Water activity

San Juan: Bioluminescent Bay Kayak Adventure by Night

Water activity

San Juan: Bioluminescent Bay Kayak Adventure by Night

Likely to sell out

From US$ 99 per person

Likely to sell out

Explore an amazing bioluminescent bay in San Juan on a fascinating kayak tour. Watch the glowing plankton of the Laguna Grande at night and learn about the local ecosystem as you paddle along.

About this activity

Free cancellation
Cancel up to 24 hours in advance for a full refund
Reserve now & pay later
Keep your travel plans flexible — book your spot and pay nothing today.
Covid-19 precautions
Special health and safety measures are in place. Check your activity voucher once you book for full details.
Duration 5 hours
Check availability to see starting times.
Live tour guide
English, Spanish
Pickup included
Pickup is available from selected areas of San Juan (Old San Juan, Condado, Miramar, Calle Loiza, Isla Verde). For guests staying in Rio Grande, Luquillo and Fajardo, a meeting point will be arranged. The exact pickup time will be provided one day prior to the tour.


  • Take part in a nighttime adventure to a bioluminescent bay
  • Paddle your way through the waters in a two person kayak
  • Marvel at millions of glowing plankton in the water
  • Learn about this fragile and unique ecosystem from your expert guide
Full description
Embark on a nighttime adventure into the waters of San Juan's Laguna Grande and see millions of glowing plankton. Paddle aboard on this guided evening tour. Make your way through mesmerizing mangrove channels and learn about the wonders of bioluminescence. After getting picked up from your accommodation, head to Laguna Grande. Listen to a quick overview and safety briefing from your guide before setting out. Paddle in a two-person kayak for approximately 30-minutes through the mystical mangrove channels leading to the natural reserve of the Laguna Grande. See the microscopic plankton capable of producing natural light at the touch of your hand. Explore these amazing organisms up close as your professional guide takes you on a journey to discover all their secrets. Learn how this fragile and unique ecosystem maintains a perfect balance of life, and what you can do to protect such a special place. Paddle in this safe and closed environment, and watch as the water comes alive with millions of glowing plankton. Be aware the bio bay is an unpredictable natural phenomenon that may be influenced by multiple factors. Bioluminosity levels can vary from very visible to minimal or none without any prior notice. The full moon phase may also affect the visibility of the bioluminescence. In the event of this happening, alternate methods such as the use of a tarp will be incorporated in order to appreciate it.
  • Hotel pickup and drop-off
  • Tour guide
  • Kayak and paddle
  • Life vest
  • Briefing
  • Tips
Not suitable for
  • Children under 7 years
  • Pregnant women
  • People with back problems
  • People with heart problems
  • Wheelchair users
  • People over 260 lbs (118 kg)
  • People with recent surgeries

Select participants and date



Important information

What to bring

  • Swimwear
  • Change of clothes
  • Towel
  • Comfortable clothes

Not allowed

  • Luggage or large bags
  • Alcohol and drugs
  • Valuables
  • Electronic devices

Know before you go

  • Please be mindful of the weight limit. No refunds will be issued if an incorrect weight is provided
  • The bio bay is an unpredictable natural phenomenon. Bioluminosity levels can vary without any prior notice
  • Each participant must be capable of paddling on their own in a 2-person kayak
Customer reviews

Overall rating

4.1 /5

based on 57 reviews

Review summary

  • Guide
  • Transportation
  • Value for money

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My 2nd time going, and 1st with .y older kids,.. it was ok, a but long, ut definitely worth a one time experience, nothing spectacular, but definitely worth going one time. My guide tho was amazing., and all the guides were so so patient,as I'm not a experience Kyacker, kudos to all the guides c

March 25, 2023

This was such a beautiful experience! I was worried about going when the moon was brighter but they covered us with a large tarp so we could still see all the bioluminescence in the water. Fair warning if you’re extremely claustrophobic, you may want to only go on the darkest nights sans tarp. Also, be aware it’s quite a long kayak journey to the bay so come with lots of energy and coordination. All worth it though!

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March 25, 2023

This was a great trip! The tour guides were great and really allowed us to experience all of the blue lagoon. I enjoyed the 3:30pm (6pm tour) trip because we got to watch the sunset, see the mangroves in the light, and also experience the bioluminescent plankton.

March 25, 2023

Product ID: 400689