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Caribbean Uncovered

4 Best Grand Cayman Bioluminescence Tours in 2024

Looking for the best Grand Cayman Bioluminescence tours for your next vacation? If so, you’re in the right place. I just got back from Grand Cayman and fell in love with the beauty and nature of the island.

You can only experience this natural phenomenon in a few places in the world. I’ve seen it first hand if I can give you one piece of advice – So, if you’re heading to Grand Cayman, don’t miss out on this once-in-a-lifetime tour.

Booking travel soon? Here are my favorite Cayman Island resources – Book your villas a vrbo.com – Find tours at viator.com – Find hotels at booking.com – Find the best deals for rental cars at Discover Cars

Night Bioluminescence Snorkel Tour

⭐ 5 stars | 2 hours √ snorkel equipment √ water and alcohol

1. Private Stingray City Snorkeling and BioBay Charter for 6 Guests

Rating ⭐5 stars | Reviews 15 | Length 6 hours | BOOK NOW!

Experience an unforgettable day on the waters of Grand Cayman with a private Stingray City and BioBay charter! With your own captain and guide, you’ll get to explore two of the most beautiful sites in the Cayman Islands .

Stop at Starfish Point and Stingray City where you can interact with friendly rays , then enjoy watching the sunset as you head to Cayman Kai – a must-see bioluminescent bay full of glowing plankton.

When I visited Stingray City , I was feeling brave so I hopped in and held, fed, and even kissed a stingray (would suggest!). With two once-in-a-lifetime experiences, this tour really can’t get any better!

On board this charter boat, you won’t have to worry about anything. All amenities are provided for up to 6 guests so that everyone can enjoy a comfortable journey out into the sea. There are even fresh showers and towels on board to freshen up.

Guest review: “We had a fantastic and memorable time. Hunter and David were professional and we enjoyed our tour to all three locations. ” (more reviews)

✅ Book this Stingray City and Bio Bay tour for 6 guests

2. Night Bioluminescence Snorkel Tour

Rating ⭐5 stars | Reviews 713 | Length 2 hours | BOOK NOW!

Experience the night in a whole new way with this Grand Cayman Bioluminescence Tour. This one-of-a-kind tour takes you on an unforgettable journey to explore the incredible bioluminescent bay Grand Cayman.

You’ll enjoy a 20-minute boat ride to Bioluminescence Cayman that will bring you up close and personal with this natural phenomenon, giving you a chance to witness its magical beauty for yourself.

The experience is even more special when you jump into the water , as it gives you an opportunity to be fully immersed in this unique environment .

Whether your preference is to stay aboard or take the plunge, there’s something special about being surrounded by thousands of glowing microorganisms that make up these waters.

Plus, if you’re lucky enough, you may even spot some sealife swimming around!

With hundreds of 5-star reviews from previous guests and crew members alike, it’s no wonder why this tour has become so popular – don’t miss out on your chance to experience something truly extraordinary!

Guest review: “An exciting way to spend an evening. A boat ride in the dark with music and fun to arrive at a mind blowing activity. Must see ! There are just a few places in the world to witness this. Do it on GC with George’s watersports Grand Cayman. ” Lori (more reviews)

✅ Book your Night Bioluminescence Tour Grand Cayman

3. Grand Cayman Islands Bioluminescent Tour

Rating ⭐4.5 stars | Reviews 78 | Length 3 hours | BOOK NOW!

Experience a unique, unbelievable adventure on Grand Cayman Island with a Bioluminescent Tour. This tour will take you to two of the island’s most beautiful and breathtaking natural attractions – Starfish Point and Bioluminous Bay.

At Starfish Point, enjoy a relaxing day at the beach with your own snacks or try out some of the drinks and food from their floating bar. There are tons of starfish for you to observe under the water. Be sure not to disturb them and take them out of the water – it will kill them.

Then as the sun sets, make your way to Bioluminous Bay where you can jump in and witness an incredible show of thousands of tiny organisms on this bioluminescence snorkel tour Grand Cayman.

At Bioluminous Bay, visitors are treated to quite a sight – it’s one of the most spectacular things to do in Grand Cayman . The microscopic organisms emit bright blue light when disturbed by movement in the water.

As you swim around these glowing waters , it creates an unreal and unforgettable experience. During this tour, all necessary equipment such as snorkel masks is provided so all you need to bring is yourself, some reef-safe sunscreen, and a towel. The tour price is per person.

Guest review: “Such a cool experience you can only have a few places in the world. This exceeded our expectations, the crew was excellent and helpful. My in-laws enjoyed the experience and they provide all the equipment you need. Excellent experience!” Jason (more reviews)

✅ Book this Starfish Point and Bioluminous Bay tour

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4. Private Stingray City Snorkeling and BioBay Charter for 10 Guests

Rating ⭐5 stars | Reviews 3 | Length 6 hours | BOOK NOW!

Experience a Grand Cayman adventure like no other with this private charter for 10 guests to snorkel and visit Stingray City and Bio Bay.

Elevate your Grand Cayman Bioluminescence Tour by experiencing it with a tour operator and guide who lives in the Cayman Islands.

Enjoy the thrill of s norkeling in beautiful reefs, interacting with friendly stingrays at the sand bar, and watching bioluminescent plankton glow as you cruise through the bay.

All your needs are taken care of – from showers and fresh towels on board to underwater camera rentals and professional photo packages are available for purchase.

Make your way out into open waters and take some time to admire the stunning sea life that surrounds you before arriving at Stingray City’s shallow sandbar home to friendly rays waiting to be hugged and kissed!

Last, jump right in amongst the bioluminescent plankton which will start glowing when stimulated by movement giving off a magical blue hue.

Guest review: “We had a group of 12 and each one of us agreed that this was by far our favorite activity while visiting Grand Cayman. Hunter and Nick were awesome tour guides! Full of knowledge, helped us tailor our trip to our liking and were a ton of fun! I would HIGHLY recommend Hunter and Nick for your next adventure if you want laid back vibes and crazy good fun! Thanks for the memories! ” (more reviews)

✅ Book this 3-stop Bioluminous Bay tour for 10

Is it safe to swim in bioluminescent bay?

While there are only a few bioluminescent bays in the world, not all of them allow you to swim in them. You are allowed to swim in Biolumious Bay in Grand Cayman and Puerto Rico.

Refer to your tour operator for safety in whatever area you’re choosing to swim in. And, if you’re scared of swimming with stingrays or sharks , this is a much chiller option! But if you’re into thrills, the Bahamas is a great option for your next diving adventure.

What do you wear on Bioluminescent Bay tour?

• bathing suit
• light jacket
• reef-safe sunscreen

When taking a Bioluminescent Bay tour, you should wear a light jacket, as the boat can get chilly when the sun is down. Your bathing suit and a cover up because the views are better when you jump in the water.

And, plenty of reef-safe sunscreen if you’ll be outdoors before the sun goes down. You might also want to bring along some water shoes if you plan on jumping in the water, but that’s not entirely necessary since you’ll be swimming most of the time.

What time of year is best for bioluminescent bay in Grand Cayman?

Grand Cayman bioluminescence bay is visible all year long. However, it’s best when there’s a new moon , meaning there’s little to no light in the night sky so the plankton can shine brightly!

Where to stay in Grand Cayman

Best places to stay in grand cayman.

You’ll find most of your hotels and resorts along Seven Mile Beach. Many villas and rentals are located on the North Side near Rum Point. I prefer the luxury life when I visit Grand Cayman, so I usually opt for villas 😉

• Kimpton Seafire Resort 9.8/10 | Exceptional
• Barefoot Kai II Villa 4.9/5 | Wonderful
• Kaibo Yacht Club 4.9/5 | Wonderful

FAQ Best Grand Cayman Bioluminescence Tours

Now that you have all the best tours in mind, here are some frequently asked questions about bioluminescence Grand Cayman

Does Grand Cayman have bioluminescence?

Yes, there is a Grand Cayman bioluminescent bay.

Where can I see bioluminescence in Cayman?

You can see bioluminescence in a bay on the north side of Grand Cayman Islands. It’s about a 10 minute if you ride Cayman kayaks from Starfish Point and a 30 or so minute boat ride from Seven-Mile Beach. There are Grand Cayman Bioluminescence kayak tours and boat tours available.

Bioluminescent Bay Cayman happens to be visible all year long.

Where are the 5 bioluminescent bays?

Puerto Rico, Grand Cayman, La Parguera, Mosquito Bay, and Vieques are the most well-known bioluminescent bays.

What time of year is best for bioluminescent bay?

The new moon is the best time of year for bioluminescent bay. December -April is also best in the Caribbean islands because the water visibility is at its clearest due to the dry climate.

Can you take pictures of the bioluminescent bay?

Yes, you can! It will be dark, so you’ll only see the glowing plankton in photos. If there’s enough, you might be able to get a photo of yourself and the plankton.

Summary: Best Grand Cayman Bioluminescence Tours

Have we gotten you excited about booking one of these 4 best Grand Cayman Bioluminescence Tours?

Exploring the bioluminescent waters of Grand Cayman is an experience that you’ll never forget. From exploring its vibrant coral reefs to swimming in its glowing waves, there’s something for everyone on a Grand Cayman Bioluminescence Tour.

Whether you’re looking for adventure or relaxation, these tours have it all and offer experiences few other destinations can provide. So if you’re searching for your next big vacation spot, don’t look any further.

• Where is Grand Cayman
• Living in the Cayman Islands
• Living in the Caribbean

Rachel is passionate about encouraging you to stop waiting and start exploring. After over a decade of traveling through the Caribbean islands, Rachel is sharing all of her secrets. She's passionate about sharing her expert Caribbean travel tips with you to make planning your trip as easy as lying on the beach.

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What is Bioluminescent Bay (Bio Bay)? Bio Bay is a bay of water on the North end of Grand Cayman situated between Rum Point and Starfish Point .  Before Hurricane Ivan in 2004 the water was too deep for the bioluminescence plankton known as the 'Pyrodinium bahamense' to thrive.  That all changed with Hurricane Ivan and now the conditions are perfect for this microscopic plankton to thrive. As a result, some estimates suggest there are between 800K - 1 MM of these plankton in a single gallon of water in the bay.  Either way, this is one of only a few locations in all the Caribbean to see this glowing phenomena and from many reports one of the brightest.

Why book a grand cayman bio bay charter considered by some to be the 'northern lights' of the underwater word, the bio bay in grand cayman is one of only a few places worldwide where you can see this glowing phenomena.  upon entering the bio bay during your boat tour, you will start to notice that the water coming off the propeller is glowing - this isn't a light rather it is the first sign of this microscopic plankton getting disturbed and thus releasing their light.  when the conditions are perfect (no moon light), you can easily see this from the comfort of the boat. either way, it is much more pronounced in the water. we recommend that you put on a mask and hop in the water to see exactly what we're talking about.   a lot of our guests tell us the bio bay feels like a scene out of the matrix or avatar.  seeing their friends/family glow in the water in the darkness of night is something they don't soon forget..

How can you enjoy Bio Bay? Bio Bay can only be enjoyed when it is dark out otherwise the light pollution will block out the glowing plankton.  Therefore, we generally only go to the Bio Bay when the moon is between the third and first quarter although it is possible to go at other times depending on the time of moon rise.  Either way, after a day of fun on the water doing a Stingray City excursion and Starfish Point tour as a part of your private Grand Cayman boat charter experience , we will take you to a beach bar where you can watch the sunset and enjoy dinner/drinks with your toes in the sand while it gets dark.  Once dark, we take a short, calm and relaxing cruise over to Bio Bay.  After spending 20 minutes or so observing this natural wonder, we head back to the dock enjoying the ~25 minute cruise across the North Sound with nothing but the stars in sight.   Trips that include a stop at Bio Bay generally end around 9 PM local time depending on the time of year.

Bio bay may be a newer attraction in grand cayman thanks to hurricane ivan in 2004, but it’s not the only attraction you can enjoy while navigating the beautiful waters of the cayman islands. here at cobalt custom charters, we offer custom boat tours that include jaunts to stingray city , starfish point , rum point ,  unique snorkeling spots scattered around the island , and so much more., book a custom grand cayman boat charter today and let us help create memories that will last a lifetime, how can you enjoy bio bay bio bay can only be enjoyed when it is dark out otherwise the light pollution will block out the glowing plankton.  therefore, we generally only go to the bio bay when the moon is between the third and first quarter although it is possible to go at other times depending on the time of moon rise.  either way, after a day of fun on the water doing a stingray city excursion and starfish point tour as a part of your custom charter experience , we will take you to a beach bar where you can watch the sunset and enjoy dinner/drinks with your toes in the sand while it gets dark.  once dark, we take a short, calm and relaxing cruise over to bio bay.  after spending 20 minutes or so observing this natural wonder, we head back to the dock enjoying the ~25 minute cruise across the north sound with nothing but the stars in sight.   trips that include a stop at bio bay generally end around 9 pm local time depending on the time of year..

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Project Description

Bio bay tours grand cayman, glow in the dark at bio bay.

You can enjoy this tour as a quick 2-hour trip or include it at the end of your day charter. We only offer private charters, so it will only be you and your family on board, allowing you more time in the water. After a day of fun activities, we can enjoy the sunset while having dinner at Kaibo beach bar. 

Once the sun has set we will head off on our Bioluminescence adventure. We’ll find the best spot to anchor, our educated captains will teach you all about this fascinating display of nature’s most captivating wonders. Our captains are great at getting the kids excited about learning and love making this experience one of your most cherished in Cayman!

It really is a once in a lifetime experience, in which many of the visitors leaving the Grand Cayman say the bioluminescence is by far the best experience of their entire trip. It’s an adventure you and your family will never forget!

After splashing around in the Bio Bay, we will slow cruise back as you stargaze in to the night sky, which makes for a perfect ending to any trip!

Beach Bar Dining

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About The Tour

The Bioluminous Eco Adventure Tour

Seafarer Adventurers

Bioluminescence Tour Grand Cayman: A Magical Experience

Grand Cayman, the largest of the Cayman Islands, is renowned for its beautiful beaches , clear waters during the day, and a captivating nighttime spectacle: the bioluminescence tour. As darkness blankets the island, certain secluded bays come alive with a soft, ethereal glow. This magical display is caused by tiny marine organisms that emit light when disturbed, creating a dance of blue and green sparkles in the water.

For those seeking a unique nighttime adventure, the Grand Cayman bioluminescence tour offers a chance to kayak or boat through these glowing waters. As you paddle, every stroke reveals a light, making you feel like you’re painting with nature’s glow sticks. Beyond the visual wonder, it’s an opportunity to learn about the delicate balance of marine ecosystems and the importance of preserving such natural wonders for future generations.

Whether you’re a seasoned traveler or a first-time visitor, the night bioluminescence tour in Grand Cayman offers a blend of beauty, science, and wonder that’s hard to find elsewhere. Take the chance to immerse yourself in this otherworldly experience.

Cayman Kayaks

The best bioluminescent tours in grand cayman.

The allure of the bioluminescent bay in Grand Cayman transcends beyond the ordinary, offering visitors a unique, enchanting experience under the Caribbean night sky. As you plan your nocturnal adventure, choosing the best bioluminescence tour becomes paramount to fully immerse yourself in the glowing spectacle of the bioluminescent plankton beneath the gentle waves.

From the tranquil kayak tours to the more expansive boat adventures, each journey through the bioluminescent bay brings you face-to-face with the delicate yet vibrant marine life that lights up the waters with a mesmerizing display. Navigate through our guide to discover the top-rated bioluminescent tours in Grand Cayman, ensuring your night-time escapade through the bioluminescence bay is luminous and unforgettable.

The following section will help you find the best bioluminescence tour in Grand Cayman.

George’s Watersports

Founded in September 2014 by George, George’s Watersports initially focused on kayak tours. George expanded into paddle board rentals and boat tours as the business grew. In 2018, George partnered with Mikol, another local from the Cayman Islands , to improve operations and provide top-notch experiences to their guests.

As you embark on a night bioluminescence snorkel tour in Grand Cayman with George’s Watersports, you can expect:

• A professional and knowledgeable team
• A variety of tour options to suit your preferences
• Quality equipment and safety measures

George and Mikol’s mission is to provide the best possible experience, whether you’re a first-time snorkeler or a seasoned expert. By choosing George’s Watersports for your Grand Cayman bioluminescence tour, you’ll be immersing yourself in the captivating underwater world of the Caribbean Sea, guided by industry professionals who prioritize your satisfaction and safety.

If you’re interested in exploring more of Grand Cayman’s marine life, George’s Watersports also offers:

• Kayak tours to explore the crystal-clear waters
• Paddle board rentals for a unique perspective atop the ocean
• Boat tours catering to various interests

With George’s Watersports, you’re in capable hands for an unforgettable night bioluminescence snorkel tour in Grand Cayman. So gear up, dive into the mesmerizing world beneath the waves, and experience the natural wonder of bioluminescent plankton lighting up the waters around you.

The Crazy Crab offers a unique and unforgettable experience, exploring the captivating Bio Bay in the Cayman Kai region of Grand Cayman. This Bay is renowned for its bioluminescent plankton, creating a magical light show when stimulated by movement. With a narrow opening and shallow waters, Bio Bay provides a warm, nutrient-rich environment perfect for these special plankton to thrive, offering a dazzling display for your snorkeling pleasure.

During your Crazy Crab, you will embark on an afternoon filled with sea, sun, and fun. Before sunset, you’ll head to Kaibo Beach restaurant to enjoy a meal or drinks while enjoying the beautiful Caribbean sunset. After dark, the adventure continues as you head to Bio Bay for a mesmerizing swim among the bioluminescent plankton. This extraordinary experience draws you in as light trails follow your every movement in the water.

While snorkeling in Bio Bay, you might also witness the fascinating mating glow worms, typically occurring two to three days after the full moon. Your journey doesn’t end when you leave the water; as you cruise back to the dock, you can relax and gaze at the starry sky above.

As part of your adventure, you can personalize your trip with optional extras such as a pickup from Kaibo, a camera rental for capturing breathtaking moments, a professional photographer, tubing, reef fishing, and more.

During your trip, you are welcome to bring any additional food and beverages, including alcohol, in non-glass containers. Remember to drink responsibly and moderately to ensure a safe and enjoyable experience.

Embrace the magic of Bio Bay and create lifelong memories with Crazy Crab’s unforgettable bioluminescent tour of Grand Cayman.

Crystal Charters

At Bio Bay, you can witness the mesmerizing display of bioluminescent microorganisms called ‘Pyrodinium Bahamanse’ that light up when the water is disturbed. Crystal Charters offers a unique bioluminescence boat tour in Grand Cayman to make this adventure memorable for you and your kids .

A great way to enjoy this experience is with a quick 2-hour trip, or you can add it to the end of your day charter. Since Crystal Charters provides private charters, you will have the boat exclusively for your family, allowing you more time to explore the captivating waters. After a day of fun activities, you can savor the sunset while having dinner at Kaibo Beach Bar, one of the best Grand Cayman beach bars .

Once the sun has set, your Bioluminescence adventure begins. The experienced captains will find the best spot to anchor and educate you about this extraordinary natural phenomenon. They are excellent at engaging kids and making the learning experience exciting.

Here are some highlights of the Crystal Charters Grand Cayman Bioluminescent Bay tour:

• Private Charters: The tour is exclusive to your group, ensuring a personalized experience.
• Experienced Captains: They are knowledgeable about the bioluminescent bay and make the trip interactive and educational.
• Snorkel Gear Provided: The tour includes all snorkeling equipment, so all you need to do is hop in the water.

To get the most out of your Bio Bay experience, the best approach is to take the plunge and observe the bioluminescence up close. As you swim in the dark, thousands of tiny sparks surround you, creating a once-in-a-lifetime moment. Many visitors to Grand Cayman claim that the bioluminescence was the highlight of their entire trip.

After exploring the Bio Bay, you can slow cruise back while stargazing into the night sky, making it a perfect ending to your adventure. Crystal Charters provides an unforgettable bioluminescence experience in the Grand Cayman that you and your family will cherish for years to come.

Cayman Snorkel Co.

Cayman Snorkel Co. offers an unforgettable experience in Grand Cayman with one of the best Bioluminescent Bay tours in Grand Cayman, one of the few places worldwide where you can witness bioluminescence. Bioluminescent plankton are unique organisms that emit light when they move and mix with air. They store energy from the sun all day and release an enchanting glow once per night. During your stay in Grand Cayman, this is a must-try activity.

On a private Bioluminescent Bay Grand Cayman tour with Cayman Snorkel Co., you can swim through Bio Bay, setting off a magical light reaction around you as you move through the water.

Bioluminescent visibility varies throughout the year due to different moon phases. Here is a list of the dates in 2023-2024 when the bioluminescence will be visible, gifts from Cayman Snorkel Co.:

• March 2023: 10th – 25th
• April 2023: 8th – 24th
• May 2023: 8th – 23rd
• June 2023: 6th – 22nd
• July 2023: 5th – 22nd
• August 2023: 4th – 20th
• September 2023: 2nd – 19th
• October 2023: 1st – 18th
• October 31st, 2023 – November 17th, 2023
• November 29th – December 16th, 2023
• December 29th, 2023 – January 15th, 2024

Cayman Snorkel Co. provides a range of private charter tours with customizable stops to experience Bio Bay:

• 2hr Private Charter to Visit Just Bio Bay : $550 USD, from 7pm-9pm
• 3hr Private Charter to Visit Bio Bay Plus 1 Customizable Stop : $750 USD, from 6pm-9pm
• 4hr Private Charter to Visit Bio Bay Plus 2 Customizable Stops : $900 USD, from 5pm-9pm

Some of the customizable stop options include Stingray City, Starfish Point, various snorkel locations, tubing, or a stop for dinner at a beachside restaurant.

Sweet Spot Watersports

Are you ready for a magical experience in Grand Cayman? Sweet Spot Watersports offers an unforgettable tour into the world of bioluminescence. Explore the enchanting Bioluminescent Bay, where millions of glowing sea animals create a spectacle. Starting from Rum Point, the customized Bio Boat takes you on an adventure through the North side of Grand Cayman, making several stops along the way.

During the 2 Hour Bioluminescence Tour, you’ll have the opportunity to observe fascinating upside-down jellyfish before arriving at the famous Bio Bay. Spend time swimming (if you choose) and learning about the amazing bioluminescent organisms with the help of knowledgeable guides.

For those seeking a private experience, Sweet Spot Watersports offers Private Excursions that include three stops: Starfish Point, upside-down jellyfish, and Bio Bay. With various group sizes and pricing options, there’s a tour suited for everyone.

Some highlights of Sweet Spot Watersports:

• Modern, customized Bio Boats designed to get you up close to the bioluminescent creatures
• Knowledgable guides that enhance your experience and share the wonders of the bioluminescent bay
• Multiple tour options for both public and private groups

With Cayman Kayaks , you can experiment with something different than the snorkeling adventures above, a bioluminescent kayak tour in Grand Cayman.

Embark on a nocturnal journey, starting with a relaxed paddle along a protected shoreline from Rum Point to the Bioluminescent Bay. As you traverse the waters, let the starlit sky above and the glowing bioluminescence below captivate you, especially during the moon’s darkest phases. Our expert naturalists will illuminate your path through the cosmos, highlighting constellations, planets, and distant galaxies. Delve into the wonders of the universe, embrace the beauty of nature, and reflect on the annals of time.

Founded in 2006, Cayman Kayaks is a family-owned venture and proudly stands as the pioneer of Grand Cayman Bioluminescence kayak tours. Their expertise lies in offering eco-friendly bioluminescent tours facilitated by double kayaks and the island’s exclusive electric boats. Their seasoned guides will navigate the night, enlightening you about this magical occurrence and emphasizing the significance of eco-conscious exploration.

The guide is equipped with a flashing light for easy identification on the water, while guests are provided with a steady light. The kayaks, designed for utmost comfort, are sit-on-top models with sturdy backrests, ensuring a smooth sail to the bay’s tranquil waters. Their shallow draft ensures easy handling, making them apt for both novices and experts. However, being at ease in the water and possessing basic swimming skills is essential. While prior paddling experience (be it kayaking, canoeing, or paddleboarding) is recommended, first-timers can rely on our guide’s tow rope for added support and guidance.

Booking Your Adventure

You can book the bioluminescence tour on the websites I mentioned above.

Many tour operators offer flexible payment options, such as reserve now & pay later . This allows you to secure your place on the tour without needing to pay upfront, giving you peace of mind and the ability to plan your vacation budget better.

Additionally, most tour operators guarantee the lowest price, ensuring you get the best value for your unforgettable experience. This means you can be confident that you are reserving your adventure at the best price possible.

Before completing your booking, check the age and group size restrictions, as well as other essential details like tour duration and start time, to ensure the tour is suitable for you and your fellow travelers.

Finally, remember to pack your snorkeling gear, a sense of adventure, and maybe even a waterproof camera to capture the magical moments as you immerse yourself in the mesmerizing bioluminescent waters of Grand Cayman. But don’t expect photos like those above if you are not a professional photo editor; this incredible phenomenon is complex to capture in photographs.

Experience With Bioluminescence and Snorkeling

Embarking on a bioluminescence tour in Grand Cayman is a unique experience that combines the thrill of snorkeling with the enchanting beauty of bioluminescent organisms in the ocean. Your adventure begins as you gear up in snorkeling equipment provided by the tour, which typically includes a mask, snorkel, and fins.

Once the sun sets, you’ll board a boat to the bioluminescent bay, where wonders await you. As you float on the water’s surface, the glittering bioluminescent creatures light up the ocean below, creating a captivating display.

The following are some highlights of your bioluminescence and snorkeling experience:

• Getting up close with bioluminescence: Snorkeling allows you to explore the bioluminescent bay in an immersive way. This close encounter with the glowing marine life offers a unique perspective you can’t get from observing the phenomenon from a boat or kayak.
• Enhanced viewing with a mask: Donning a mask improves your visibility of the bioluminescence by up to 10 times. The clear lens lets you see thousands of bright sparkles swirling around just below the water’s surface.
• Learn about the science behind the glow: Knowledgeable tour guides will share fascinating insights about how and why bioluminescent organisms produce light, adding depth to your understanding of this natural wonder.

During your nighttime snorkeling adventure , it’s essential to prioritize safety and ensure you follow the guidance of your tour operators. Adhering to their advice guarantees a positive and secure experience.

Safety and Accessibility

The tour operators mentioned above prioritize your safety and ensure an enjoyable experience, even for those with limited mobility. While safety is paramount, it’s crucial to note that the tour may not be accessible for everyone, particularly those who use wheelchairs.

Key Safety Measures:

• The tour operators are safety-oriented and well-trained to handle any situations that may arise.
• All necessary equipment, such as life jackets and snorkeling gear, is provided and maintained in good working condition.
• The boat ride to the bioluminescent bay involves a 20-minute journey, and the boat is equipped with safety equipment like life vests and first aid kits.
• Detailed safety instructions are given to all participants before the start of the tour.

Accessibility Considerations:

• Unfortunately, the tour is not wheelchair-accessible due to the nature of the activities involved.
• Participants with heart problems or severe medical conditions should consult their physician before joining the tour, as the snorkeling activity may not suit everyone.
• Infants must always sit on laps and be supervised by an accompanying adult.

To ensure a smooth and stress-free experience, here are some tips for those participating in the night bioluminescence snorkel tour:

• Wear appropriate clothing, such as a swimsuit, and bring a towel for drying off after the snorkeling session.
• If you have any medical concerns or require special accommodations, please let the tour operators know beforehand so they can provide assistance or offer alternatives.
• Be attentive to the safety instructions given by the tour guides and follow their recommendations to have a safe and memorable experience.

Considering these factors, you can enjoy a night of magical bioluminescence in Grand Cayman, knowing your safety and accessibility needs are taken care of.

Cancellations and Refunds

Most tour operators provide a free cancellation policy allowing you to cancel your booking without penalty. However, the cancellation window may vary depending on the provider. For instance, some tours allow cancellations with a full refund up to 24 hours in advance, while others may have different time frames. Make sure to review the specific cancellation policy of the provider before booking your tour.

There are a few common factors to consider when canceling your tour that may affect your refund eligibility:

• Time of cancellation – As mentioned earlier, ensure you cancel within the specified timeframe to receive a full refund.
• Weather conditions – Operators may cancel tours due to poor weather conditions. In such cases, they will offer an alternative date or a full refund.
• Unforeseen circumstances – If the tour operator cancels the trip for reasons beyond their control, they usually offer a rescheduled tour or a full refund.

To cancel your booking and claim your refund, follow the steps provided by the tour operator, which usually involve contacting their customer service team. Make sure to have your booking details handy to facilitate the process.

The Impact of Tourism

Tourism is a significant contributor to the economy of Grand Cayman, and the bioluminescence tours are no exception. This unique and mesmerizing experience attracts thousands of travelers each year, providing a steady revenue stream for local businesses and the island.

The beauty of Bio Bay, along with its rare bioluminescent phenomenon, has increased the demand for vacations to this awe-inspiring destination. More travelers seeking this adventure results in various positive revenue impacts for Grand Cayman.

Some of the direct benefits include:

• Increased bookings for bioluminescence tour operators
• More overnight stays in hotels and vacation rentals
• Higher demand for local restaurants, bars, and shops

In addition to these direct financial gains, the popularity of the bioluminescence tours indirectly promotes Grand Cayman as an appealing vacation destination for eco-tourists and marine enthusiasts alike.

These visitors often enjoy other water-based activities and excursions during their stay, such as:

• Scuba diving
• Stingray City visits
• Kayaking and paddleboarding
• Deep-sea fishing

As you plan your vacation to Grand Cayman, remember to be mindful of the fragile ecosystem that makes the bioluminescence snorkel tours possible. By ensuring that the dinoflagellates and the bay’s natural environment are protected, you can help preserve this magical underwater experience for future travelers. Booking your tour through a reputable, eco-conscious company (like I mentioned) can significantly support this effort.

Memories Of The Trip

On your night bioluminescence snorkel tour in Grand Cayman, you’ll create unforgettable memories beneath the starry sky. As you embark on this adventure, prepare for a magical encounter with nature’s glowing wonders.

Upon arrival at the bioluminescent bay, you’ll be mesmerized by the sparkling blue water, as if stardust filled the ocean. Each movement you make in the water comes to life, illuminating the surroundings and creating a breathtaking spectacle.

To make your experience even more memorable, here are a few tips for your trip:

• Wear comfortable swimwear, as you’ll be in and out of the water.
• Bring a waterproof camera or phone case to capture memories without worry.
• Listen to your guide’s instructions for the best viewing opportunities.

One of the most delightful aspects of this tour is the opportunity to witness the vibrant marine life of Grand Cayman. You’ll discover a hidden underwater world as you snorkel alongside glowing sea creatures, including:

In addition to the marine life, the serene atmosphere of the bay at night will undoubtedly leave you in awe. As you glide through the water, the gentle lapping of the waves and the whispers of the wind create a perfect symphony of sounds, enhancing your unique experience.

The night bioluminescence snorkel tour in Grand Cayman is an experience that will undoubtedly leave an indelible impression on your heart. This unforgettable adventure will allow you to connect with nature in an extraordinary way and create stories you’ll treasure for a lifetime.

If the magical experience of bioluminescence tours captivated you, imagine what lies beneath the waves. Our guide to the best scuba diving courses in Grand Cayman for beginners can help you uncover these underwater marvels.

Frequently Asked Questions

The best time to visit Bioluminescent Bay in Grand Cayman is during a new moon or when the sky is relatively dark. This will allow you to fully appreciate the fantastic light show put on by the bioluminescent organisms. Remember that you can also witness bioluminescence on darker evenings throughout the year, not just during the new moon.

You’ll most likely need to book a tour with a local provider to reach the Bioluminescent Bay in Grand Cayman. Various options include boat tours, kayak tours, or snorkeling excursions.

The water in Bioluminescent Bay is usually shallow and calm, making it suitable for people of all ages and swimming abilities. Although the depth can vary depending on specific locations, you can typically expect the water to be between 3 to 10 feet deep.

Here are some safety precautions to keep in mind during your night bioluminescence snorkel tour: – Wear a lifejacket if you’re not a confident swimmer – Listen carefully to the tour guide’s instructions and follow them – Avoid touching marine life to protect both yourself and the ecosystem – Be aware of your surroundings to prevent accidentally colliding with others in the water

While on a bioluminescence snorkel tour in Grand Cayman, you can expect to witness the enchanting phenomenon caused by tiny bioluminescent organisms known as dinoflagellates. When disturbed, these organisms emit a natural light, creating the stunning glow you observe in the water. Apart from the bioluminescent creatures, you may also spot other marine life during your snorkeling experience, such as small fish and active crustaceans at night.

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2 Hour Bioluminescence Tour | Public

Trip Highlights

Glowing bioluminescence, bioluminescence in grand cayman - boat tour, description.

The Sweet Spot—Cayman’s first boat tour to the world-famous Bio Bay. Our customized boat was specifically designed for your comfort, getting you up close and personal with millions of glowing sea animals. This one-of-a-kind experience has become a favourite activity on Grand Cayman. The Sweet Spot Cayman does two stops, including a stop at Starfish Point, an educational briefing about the upside-down jellyfish, then to the famous Bio Bay, where we spend most of our time viewing and swimming (optional) in the Bay. Although the bioluminescence can be viewed from the boat, it’s even more magnificent if you’re able to swim with them. Our informative guides will tell you all about this amazing sight.

Pricing: Adults (12+) $89.00each

Children (3-11) $69.00each

Capt. Marvin's Dock Or at Kaibo (See FAQ below for the complete address)

Why take this tour?

Our custom-made bioluminescence tour boat was specifically designed for these tours, letting you get up close and personal with the Bioluminescence while riding in comfort, perfect for enjoying with the family and kids.

Spend your time at Bio Bay

Starfish point to see the setting sun and awakening stars, frequently asked questions, where can you pick up, things to know, age requirement.

Adults (12+) | Children (3-11)

Prices range from $69 - $89 each

Tour is about Approx. 1.5 to 2.5 hrs depending on your embarkation point.

Transportation

Provided at $6 per person on public tours and $40 or $6 pp whichever is greater on private tours.

Pick-up Locations

• Capt. Marvin’s dock at 292 Raleigh Quay Governors Harbour
• Kaibo Dock 585 Water Cay Rd. Rum Point KY1-1701
• FALLS- Capt. Marvin’s main office 1114B Cayman Falls Shopping Plaza WB rd.
• Coral Sands Resort - front
• Harbour View - front
• Poinsetta - front
• St. Matthew's Res. Hall - front
• Grape Tree - ofc - Seven Mile Beach area
• Cocoplum - ofc -Seven Mile Beach area
• Georgetown Villas - no ofc
• Grandview - ofc
• Sunset Cove - Palmar open-air lobby
• Crescent Point - ofc
• Plantation Village - ofc
• Seven Mile Beach Resort - parking lot
• Tamarind Bay - ofc
• South Bay Beach Club - ofc
• Hampton by Hilton
• Hampton (Old Comfort Suites )- lobby
• Marriott Beach Resort - lobby
• Regal Beach - ofc
• Laguna del Mar - ofc
• Locale Hotel - lobby
• Seagull - parking lot
• Cayman Reef - ofc
• Island Pine - front
• Royal Palms
• Coral Caymanian - front
• Sovereign - ofc
• Cayman Club - ofc
• Lacovia - ofc
• Water Colors - lobby
• Palm Heights - lobby
• Colonial Club - ofc
• Islands Club - ofc
• Caribbean Club - Luca Restaurant
• Meridian - ofc
• Beachcomber - ofc
• H2O Lodge - front
• Coral Stone - ofc
• Ritz-Carlton - main lobby
• Villas of the Galleon - Front Office/Parking Lot
• Westin - Lobby
• Pinnacle - office
• Plantana - office
• Great House - parking lot
• Avalon - office
• Harbor Heights - ofc
• Public Beach
• Kimpton Seafire
• Renaissance - Tarquynn Manor ofc
• Heritage Club (House) - front
• London House - front
• Commonwealth - ofc
• Mandalay - ofc
• Victoria House - empty lot
• Anchorage - front
• Christopher Columbus - ofc
• Silver Sands Resort - ofc
• Discovery Point - ofc
• Aqua Bay - ofc
• The Palms - ofc
• Drifter's Cover
• Boggy Sand Condo - Front Gate
• Cemetery Beach
• Holiday Inn Lobby
• Casa Caribe - Parking Lot/Front Office
• Coral Reef House (Pink House)- Front
• Grove - Front Entrance
• Sundowner - Parking Lot

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2 Hour Excursion with Bioluminescence Tour | Private

Cayman’s first boat tour to the world-famous Bio Bay with the Sweet Spot. Our motor catamaran boat was designed with this tour in mind, getting you up close and personal with millions of glowing sea animals. This is a one-of-a-kind experience and many people’s favorite activity on Grand Cayman. The Sweet Spot Cayman does 3-stops, The first stop is Starfish Point to see the setting sun and awakening stars. The next stop is the upside-down jellyfish then to the famous Bio Bay, where we spend most of our time, viewing and swimming (optional) in the bay. Our informative guides will tell you all about this amazing sight.

Pricing: Private Tour (up to 8 people) - $900 each Additional Guests (up to 20 people) - $69 each

Private Excursions

PRICING: 2 Hour Excursion with Bioluminescence Tour

**Private | Up to 8 guests** Private Tour (up to 8 people) - $900 each Additional Guests (up to 2 people) - $69 each

Bioluminescent Tours

Grand cayman.

        There are only a few places in the world where you can experience the bioluminescence. Bio Bay, located in Grand Cayman of the Cayman Islands, is one of these places. You may be wondering what exactly are bioluminescence. Well bioluminescent plankton is an organism that emits light when moved and mixed with air. This movement causes oxidation which releases the glow you will see in the water. Each organism stores energy from the sun all day just to release this glow just once per night. Making an awesome activity to partake in during your stay here in Grand Cayman.

        With your own private charter to view the bioluminescent, you are able to get into the water, setting off your own light reaction as you swim through the Bio Bay. We highly recommend putting on a mask and snorkel during your visit here for a whole new experience. To look under the water as you move your arms through the bioluminescence, watching the tiny, green glowing plankton bounce away from your hands, is truly a magical experience. These bioluminescent are only visible during certain times of each month due to the different moon phases. Please check below to see if the bioluminescene will be visible during your visit to Grand Cayman.

Bioluminescent Visibility Schedule

Below you can view which dates the bioluminescence will be visible during each month and the tour options available.

• Decmber 29th (2023) – January 15th (2024)
• January 28th – February 13th (2024)
• February 27th – March 14th (2024)
• March 27th – April 12th (2024)
• April 26th – May 12th (2024)
• May 26th – June 11th (2024)
• June 24th – July 10th (2024)
• July 23rd – August 9th (2024)
• August 22nd – September 8th (2024)
• September 20th – October 7th (2024)
• October 20th – November 6th (2024)
• November 18th – December 6th (2024)
• December 18th (2024) – January 4th (2025)

This private charter to Bio Bay is available on our boat, Hatchling , only.  Although the Bioluminescence is a customizable stop option, due to this option needing to be viewed at a time that is very dark, there are set times below. Please contact us directly to customize a start time for full day, 6 & 8 hour charters. Other tour time options are as follows: 

• 2hr Private Charter to Visit Just Bio Bay: This Private tour is $550 USD, beginning at 7pm – 9pm.
• 3hr Private Charter to Visit Bio Bay Plus 1 Customizable Stop: This private tour is $750 USD, beginning at 6pm – 9pm.
• 4hr Private Charter to Visit Bio Bay Plus 2 Customizable Stops: This private tour is $900 USD, beginning at 5pm – 9pm.

A few customizable stops options available are Stingray City, Starfish Point, various Snorkel locations, a tubing stop option and a stop for dinner at a beachside restaurant. Click here to view all of our stop options available.  

Things To Do | Grand Cayman

Bioluminescence Snorkel Tour (Grand Cayman 2024)

Bioluminescence tour.

Video Showing Our Bioluminescence Tour

Watch Our Guest’s Video Review!

Tour Description

We take a boat to the bioluminescent bay (20 minute boat ride).

Once at the Bio Bay, you have the option to snorkel with the bioluminescence.

The visibility of the bioluminescence is 10x better in the water with a mask.

The mask allows you to see thousands of bright sparkles underwater. If you stay on the boat, you will see exactly what is seen on a kayak, it's just significantly better in the water with a mask. The bioluminescence is caused by millions of single-celled plankton called dinoflagellates that give off light when disturbed in the water at night.

• Water where we snorkel is only 4 feet deep.
• The water is not cold.
• There are NO sharks; there has never been a shark attack in Cayman.
• Bio Bay is calm with no currents or waves.
• Jellyfish are not a problem because we have full body wet suits, dive gloves and dive shoes. There are few jellyfish in the winter months, but in the summer months, there are more jellyfish due to warmer waters. Even if you were stung by one of these jellyfish, it doesn't hurt and the itchiness only lasts for 5 minutes.

This tour typically departs 15 minutes after the sun sets. It operates year-round, but only for about 2 weeks each month, due to the moon cycle. It is primarily the moon rise/set times that impact bio visibility, not the moon phase.

Tour Details

• Hotel Pickup Available
• Tour Departs From Near Seven Mile Beach
• Small Groups
• Free Beer, Sodas & Bottled Water
• Snorkeling Equipment Provided
• Comfortable Fast Boat
• Increased Visibility With The Mask
• $135 USD Per Person
• Kids Under 12 Are $110 USD
• Tour Duration is 2 Hours
• Minimum Age Is 3 Years
• Maximum Weight Is 275 lbs

What Is The Bio Bay?

The Bio Bay (Bioluminescent Bay) is a man-made bay which was dredged out nearly 30 years ago.

The Bio Bay was created as part of a real estate project; there are private villas on the shore of the bay.

The physical features of the Bio Bay trap the dinoflagellate plankton, which is why there is such a high concentration of these plankton in the bay.

There is a myth that boats and/or snorkeling are bad for the dinoflagellate plankton in the Bio Bay.

There is no evidence to suggest this is the case; there have been boats in the Bio Bay since its inception; all of the homes on the Bio Bay have docks and boats.

The visibility of the bioluminescence is always fluctuating. The factors that determine the visibility of the bioluminescence is the tide level and weather.

Additional Information

Our bioluminescence boat/snorkel tour departs from the Cayman Islands Yacht Club. This is on the west side of Grand Cayman, near Seven Mile Beach. This is NOT the George Town Yacht Club.

We recommend that guests book this tour as early in their vacation as possible; there is a relatively high risk of cancellation due to weather; if you make the reservation at the beginning of your vacation, and the tour is cancelled, then you have more potential to reschedule. Click here to view our cancellation & refund policy .

We aren't able to accommodate cruise ship passengers on this tour because this is a night-time activity, and the cruise ships leave before it gets dark.

Check Out Our TripAdvisor Reviews Below

Images Of Our Boat

Swimming With Bioluminescence

Below Is Our Tour Departure Location

Our bioluminescence boat/snorkel tour departs from the Cayman Islands Yacht Club (Dock B). This is on the west side of Grand Cayman, near Seven Mile Beach. This is NOT the George Town Yacht Club.

We also offer pickup by bus from most major hotels/resorts along Seven Mile Beach. If you need us to pick you up, then you can select your pickup location during the check out process on our website.

Can kids do our bioluminescence tour?

Yes, we frequently take kids and families on our bioluminescence snorkel tour. Our minimum age is 3-years. We have kid sized life jackets and snorkels and masks.

How much does our bioluminescence tour cost?

This tour is $135 USD per person. Kids under 12 years are $110 USD. You can read our refund and cancellation policy at the bottom of this page.

What time does our bioluminescence tour depart?

Our bioluminescence tour departs 15 minutes after the sunset. We depart at this time so that it is completely dark when we arrive at the Bio Bay. You can see our exact departure times and dates by clicking the Book Now button on our website.

Check Out Our Other Tours!

Popular searches

Best beaches, seven mile beach, stingray city, tours & excursions, bioluminescent electric boat tour.

Aboard Nightshift, an innovative electric boat, you will cruise to the bioluminescent bay beneath a star-studded night sky on a vessel like no other.

The custom designed observation deck is just 10 inches from the surface, so your hands and feet are able to reach the surface to swirl around in the bioluminescence.

The crew will share a wealth of information about the bioluminescent bay, the night sky and the upside down jellyfish that live in the bay.

Come prepared to get wet.

• Focused on preservation
• Lead by experienced staff
• Stargazing laser show
• Cayman’s ONLY electric powered boat
• Cassiopeia Jellyfish show and tell
• Transportation can be arranged
• No need to swim to experience the bioluminescence

Minimum age of 4 years old, 275lbs or under per person

Ages 4 and up

• Bioluminescent Electric Boat US $75 / person

Payment Terms

Special offer, other experiences from cayman kayaks, bioluminescence kayak night tour.

After a short kayak ride you can witness a rare and enchanting display of natural underwater lights.

Recommended ages: 6+

Mangrove Kayak Tour

Don’t miss exploring one of the most amazing and important ecological systems of the world right here in the Cayman Islands.

Recommended for all ages

More Recommendations near Rum Point

Stingray city snorkel tours.

Please let us know if you have any comments, corrections or ideas to improve!

Explore Cayman Magazine

The 2024 edition of the Explore Cayman magazine is a 160 page full colour magazine and is available on Island for free!

Explore Cayman App

The Explore Cayman app is the #1 app for the Cayman Islands and can be downloaded for free from the Apple app store.

Bioluminescent Bay

Top ways to experience Bioluminescent Bay and nearby attractions

Most Recent: Reviews ordered by most recent publish date in descending order.

Detailed Reviews: Reviews ordered by recency and descriptiveness of user-identified themes such as wait time, length of visit, general tips, and location information.

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BIOLUMINESCENT BAY: All You Need to Know BEFORE You Go (with Photos)

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• (0.30 km) 2 BR MoonLight Kai condo at Kaibo Yacht Club, ph.2
• (0.27 km) Stingray Kai Kaibo Beach Front Condo
• (0.29 km) 5BR-Two Rainbows: Oceanfront Private Villa in Rum Point-Gorgeous Barefoot Beach!
• (0.30 km) Sea Cove: Cayman Kai Villa w/ Private Dock & Waterfront Sun Deck for
• (0.30 km) "Romantica" - Luxury Oceanfront Condo at Kaibo Yacht Club Phase II
• (0.57 km) The Rum Point Club Restaurant
• (0.55 km) The Wreck Bar & Grill
• (1.23 km) Upstairs Restaurant
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• (1.24 km) KAIBO Beach Espresso

• Bio Bay Boat Tour
• Early Bird Tour
• Tel +1-345-938-3303

Cayman Boat Tours, Six Senses Cayman Islands

Six senses eco tour, adults us$110 children under 11 us$90.

Our multiple award winning Six Senses Eco Tour is a five hour, six stop adventure tour. We get to Stingray’ City after cruise ships and the local islands tours have departed!!

Six Senses Bio Bay Tour

Adults us$90 – children under 11 us$75.

Hidden in the North Sound is one of the most spectacular Bioluminescent Bays in the world. Be sure to sign up for this adventure . Click the button below for more information.

Six Senses Early Bird

Adults us$90 children under 11 us$70.

Several times each week, we are asked if we can accommodate shorter and earlier tours to avoid the midday rush at the sandbar. Click the button below for more information.

Find Us On Trip advisor.

Well over 1326 excellent reviews and counting.

“Not your run of the mill tour”

Cayman boat tours get away from the cruise ship crowds and book with six senses cayman tours. we booked the early bird tour and had the entire sandbar to ourselves (10 people total). there is nothing like swimming and feeding the rays and this is the tour to do it on..

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• Bio Electric Boat
• Sunset & Stargazing
• Morning Tour
• Transportation
• Places To Eat

BIO Bay Electric Boat

BIO BAY KAYAK

BIO BAY ELECTRIC BOAT

Sunset &  stargazing boat.

1.5 – 2 Hours

CHECK IN 7:20PM & 9:20PM

$75 USD PP + FEES Minimum Age: 4 Years Old

RUM POINT CLUB Sand Point Road ( DIRECTIONS )

Minimum 48 Hour Cancellation / Rescheduling Policy

We are honored to be the Gold Medal Winner for Best Boat Tour Company in the Cayman Islands for the ‘Best of Cayman’ 2023 Competition.

Introducing nightshift, cayman’s only electric bioluminescent boat tour.

Aboard the Nightshift, you will cruise to the bioluminescent bay under a beautiful night sky on Cayman Kayaks new and improved ELECTRIC BOAT! (scroll down for photos) You will not see any boat like this one we built! 

Cayman Kayaks, established in 2006, is the original tour operator of Bioluminescent Tours in Grand Cayman. We specialize in providing sustainable Bioluminescent Tours by double kayak and Cayman’s only ELECTRIC BOAT. Our top notch guides will lead you through the night, teach you about this natural phenomenon, and the importance of exploring in an environment-friendly manor.

From the top deck of the electric boat, be dazzled by a sky full of stars. Our skilled Naturalist will use a laser pointer to guide you through the constellations, planets, and galaxies! Stargazing is a great way to experience nature, explore science, and ponder history.    Once anchored in the bioluminescent bay, steps will lead you to a dark room where the magic continues. You will take a seat on the observation deck, which is low to the surface of the water, so your hands and feet are able to reach in to swirl around in the glowing water. 

Come experience the wonder and mystery of bioluminescence for yourself on Nightshift… a one of a kind electric boat for a one of a kind tour!    

Upcoming Tour Dates

January 28th – February 13th February 26th – March 13th CLICK HERE for future dates and availability

We schedule our tours around the moon cycle each month, to ensure a quality experience.  We only go on the darkest nights of the month! Looking for a future date? Send us an email! [email protected]

Is it safe to swim?

You are allowed to swim, but our company discourages swimming to prevent fouling the water and the risk of being stung by jellyfish.

It is a fact that thousands of jellyfish live in the bay year round on the sea bed. These jellyfish have a mild sting, but it may be very uncomfortable when stung depending on the individual and where on their bodies they get stung. There may also be other species of jellyfish with a more potent sting so again, we generally discourage swimming.

However , if you are determined to swim, PLEASE ensure you arrive for the tour free of chemicals/lotions that are not reef safe from your body before the tour. Wearing a long-sleeved rash guard would be a good idea too.

Harmful chemicals/lotions in and on your skin/hair wash off your body and end up trapped in Bio Bay harming the microscopic organisms due to the low water exchange. Since the glowing creatures are trapped in the bay, allowing their glow to increase in number, this also means that if we bring pollution to the bay these pollutants foul the waters and are also trapped. Pollutants trapped in the bay take longer periods of time to be washed out or break down and decompose. Please be respectful to the natural phenomenon.

This ecosystem is fragile! 

What to Wear:

You will get wet on this tour from walking 1-2 feet in to the shallow sandy bottom to and from the boat. You will also get wet when seated down in the observation deck while interacting with the Bioluminescence. We suggest swimsuit, t-shirt, and shoes that can get wet.  Some may enjoy a long sleeve for the ride. A towel and spare dry shorts are recommended for a comfortable drive back at the end of the tour.

Click here  for our transportation suggestions.

Accessibility On The Boat

When guests arrive at Rum Point, we meet on a sandy beach before walking to the shoreline where the boat is parked. We will walk into water that is roughly a foot deep, then walk up a sturdy staircase onto the boat. (Picture below to show the steps) From there, we kindly ask all guests to walk up a second staircase with handrails on either side and sit on a comfortable padded bench to and from the journey to the bay. Once the anchor is set, guests are able to walk down the stairs and interact with the bioluminescence from the custom designed observation deck.

Cancellation Policy

In order to continue running the high-quality trips that our guests are accustomed to experiencing with us, we need to know that you will show up. Once you book a trip with us your reservations are protected. Unlike the airline industry, we do not overbook our tours to hedge against potential cancellations. We are committed to providing you with the experience that you asked for, in return, we ask that you commit to honoring your reservation.

• For reservations of 7 or less guests, a minimum of 48 hours notice prior to scheduled tour time is required in order to receive a refund minus a booking fee of $10 USD per person + processing fees. Cancellations made within 48 hours prior to the tour time will not receive a refund.
• For reservations of 8 or more guests, a minimum of 5 days notice prior to scheduled tour time is required in order to receive a refund, minus a booking fee of $10 USD per person + processing fees. Cancellations made within 5 days of the tour time will not receive a refund.

Meet Your Guides

You are in for a treat with Tom and Josh. Both are Caymanian born and raised and are passionate about sharing their love for Bio Bay and their homeland with you. They are very kind, patient, knowledgeable and entertaining, and will bring out the inner child in all of you!  

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Bioluminescent Bay

Grand Cayman is one of a handful of destinations where you can experience the Bioluminescence phenomenon. This is one tour that should not be missed!

There are only a handful of destinations where you can experience the Bioluminescence phenomenon and Cayman is fortunate enough to be one of them!

Bioluminescence is the emission of light from the extremely high concentrations of bioluminescent phytoplankton that live in the water. When disturbed, they emit a burst of light flash lasting a fraction of a second. This light emission is used as protection to scare predators.

The Bioluminescent Bay is located on the North Side of Grand Cayman. It is a 10-15 minute kayak from Rum Point, Starfish Point and Kaibo, and approximately a 45 minute ride by boat from Seven Mile Beach.

Starfish Point

Stingray city & the sandbar, mastic reserve & trail.

In order to experience the full Bioluminescence phenomenon, this tour requires a dark sky in order for the bioluminescence to be seen properly. Therefore most tours only operate this tour at certain times of the moon cycle. Usually the week before and the week after the New Moon.

Bear in mind that many other factors will affect the visibility of the glow level and brightness. These factors include temperature, weather and tides.

During the summer months, the Bioluminescent Bay is generally packed with small jellyfish that may sting you if they are disturbed.

Below are two companies that offer tours to the Bioluminescent Bay.

Cayman Kayaks

Cayman Kayaks specialise in providing sustainable Bioluminescent Tours by double kayak and Cayman’s only electric boat.

Sea Elements

They provide an interactive adventure in the beautiful waters of the Cayman Islands. Also run Emergency First Responder certification course

Bioluminescent Bay Grand Cayman: I Visited And Reviewed With Pics

The Bio Bay in Grand Cayman is a captivating natural phenomenon. In the evening, bioluminescent microorganisms create a gentle, blue-green illumination in the water, making a kayak or boat tour an enchanting experience. While the sight is undoubtedly magical, managing expectations is important as the brightness can vary depending on the moon’s brightness.

I hired a private boat from Captain Marvin Watersports with my friends to Stingray City, Rum Point, for supper and sundown drinks, then to Bioluminescent Bay. The guides on our tour were fantastic, giving us time to swim and experience the Bio Bay like superheroes! Seeing the blue-green shoot from your hands under the water is incredible. But there are inevitable curveballs I wish I had known about before attempting this trip.

Upon my visit with the crew to Cayman, we decided to visit Sand Point Road, where Bio Bay is located. In the rest of this article, I will walk you through my experience there and what you should look out for as you plan your trip to this exciting destination on the Caribbean island.

• Bioluminescent Bay Grand Cayman Review

Table of Contents

What You Should Know Before Going

I discovered that Bioluminescent Bay in Cayman is only accessible by boat tour. Many boat charter options can include a trip to Bio Bay at the end of the day’s charter. Alternatively, you can book a direct 2-hour private charter trip to the place.

• My other friends and I stayed at Seven Mile Beach but planned to go on a bioluminescent bay tour using Captain Marvin Watersports. We had a supermoon during that period. This is always good for bioluminescence since the tides impact the amount of luminescence you see.
• I don’t recommend you go when the moon is bright because it decreases the impact of the lights in the water, so you won’t get those Instagram-worthy pictures to capture the moment.
• I also recommend you go on weekends, particularly on Sunday, which we did, because there was less traffic. Meanwhile, I first went to the East End, ate at Tukka East, and watched the sunset before heading to the departure location for the 9:30 pm tour.
• Depending on your bioluminescence tour, the typical boat charter service will depart for the bioluminescence tour 15 minutes after sunset. The idea is to ensure it is completely dark when arriving at Bio Bay.
• Before leaving, take a set of fresh clothes or a towel because you can get wet.
• If possible, don’t bring valuables along. There won’t be a safe place to store them in the kayak. Also, you may flip over.

When is Bioluminescent Bay open?

Since the bay functions at its best when it’s dark, you tend to see people visiting the Bioluminescent Bay in Cayman, mostly at night. List most other water activities and destinations on the island; there are no straight-jacket opening and closing times. The time frame for your visit depends on the specifications of your tour package.

Do you need to book in advance to visit Bioluminescent Bay?

Yes, Bioluminescent Bay in Cayman is accessible by water, and you need to book a boat charter (private or otherwise) that can take you there. The Bioluminescent Bay is located on the north side of Grand Cayman.

It is a 10-15 minute kayak ride from Rum Point, Starfish Point, and Kaibo and approximately a 45-minute ride by boat from Seven Mile Beach .

My Experience at the Bio Bay

There are two main ways to enjoy a tour of this bay. You can experience the Bioluminescence Glass Bottom Kayak Tour or the boat option.

Before we went on the kayaks, we got a brief tutorial on the starfish and how their population has been wiped out because people lifted them out of the water. I learned that the starfish can flip around if you turn them upside down, but they eat the little starfish. So they advise us not to place smaller ones near the big ones.

The kayak tour was a 30-minute paddle against the current to the bay. The paddling wasn’t strenuous, but it required effort and attention. But we enjoyed the generated lights as we agitated the microscopic creatures in the water.

The bay is a residential area, so getting accommodation after the tour was not challenging.

After getting on the sandy embankment, our guide gave us a quick astrology lesson where we learned about the two different types of jellyfish.

The highlight of the tour was the bioluminescence. It was a sight to behold.

The colorful lights around our paddles and the flashing lights became something out of Star Wars.

The glass-bottom kayaks were neat, and paddling back from the bay was easy. The overall tour to Bio Bay took 2 hours, and beyond the display, you will learn a lot about starfish, kayaking, and the wonder of bioluminescence.

My regret was not going in a swimsuit because we got soaked. After research, I discovered that some boat charters offer free swimsuits and gloves when you come on board—for example, George Watersports.

What Makes the Bio Bay in Cayman Special?

The spectacular sight at the bay is the climax of your tour. When the water’s movement disturbs the microscopic organisms, they emit a bright blue light. So as you paddle the kayak or swim in the water, you agitate the organisms to emit a glow in the dark.

The experience is indeed unreal and unforgettable.

If you book a tour with the right company, all the necessary equipment, such as snorkel masks, will be given to you. But you still need to bring some reef-safe sunscreen and a towel. T

Is it safe to swim in a Bioluminescent bay?

Swimming in a bioluminescent bay is generally safe, and safety protocols are in place whenever you book a tour of Bio Bay on Cayman.

However, according to a study by WebMD , an online publisher of news and information about human health and well-being, some bioluminescent algae produce toxins that are harmful to marine wildlife, humans, and anything that comes into contact with them.

So this is not an everyday activity. But visiting once in a while isn’t harmful.

About  Michelle Purcell

Born in California, Michelle traveled extensively through the USA and Europe before moving to South Florida during the pandemic. Her career in Marketing has taken her all across the world. Her favorite country is France but she'll never turn down a beach vacation!

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