Name: Puerto Rico: Bio Bay Swim and Sunset Charter or Late Night Tour
SKU: 361404P1
Availability: InStock
Rating: 4.9 (362 reviews)

WizardTrip

Puerto Rico: Bio Bay Swim and Sunset Charter or Late Night Tour

4.8(362)· San Juan· By Mareaito Charters

Free cancellation

From

€59per person

1 to 13 travelers per booking.

Time

1 × Adult × €59€59

Total€59

About the activity

Discover two exceptional locations: the sandbars of La Parguera and one of the world's five Biobays, uniquely offering the chance to swim within it. Enjoy our comfortable boats and experienced captains.

What's included

✓Floaties

What is not included

✕Towels and snorkeling gear

Activity itinerary

Activity Schedule 2 h We will depart 30 minutes before sunset, heading to a sandbar for swimming and sunset viewing. After bidding farewell to the sun, we'll proceed to the Biobay for a 30-minute swim amidst the bioluminescence. Finally, we will return to the dock. During peak season, a late-night tour focusing solely on the Biobay will be available, excluding the sunset experience.

Places visited

La Parguera Bioluminescent BayCayo Caracoles

How to use your ticket

Your mobile or paper ticket is accepted. One ticket is required per booking.

Meeting point and return

Meet directly in front of La Casita Sea Food. Please search for Mareaito Charters on Google Maps.

If the main route through Downtown is closed, please navigate around via Calle 1.

Meet directly in front of La Casita Sea Food. Please search for Mareaito Charters on Google Maps.

If the main route through Downtown is closed, please navigate around via Calle 1.

Meeting point

End point

This activity ends back at the meeting point.

Practical information

Service animals are permitted.
This activity is not advised for individuals with cardiovascular health issues.
Participants should possess a moderate level of physical fitness.

Activity options

Puerto Rico: Bio Bay Swim and Sunset Charter or Late Night Tour

Duration

2 h

How to prepare for your experience

Bring swimwear for swimming in the bay and at the sandbar.
Consider bringing a waterproof bag for personal items.
Listen carefully to the captain's instructions for safety.
Be prepared for a unique and potentially awe-inspiring experience.
Check the weather forecast, though the tour may proceed in light rain.
Allow ample time for travel to the meeting point.

Experience the magic of Puerto Rico's bioluminescent bay and stunning sunsets on this unforgettable boat tour.

Cancellation conditions

For a full refund, ensure cancellation at least 24 hours prior to the scheduled departure.

Any questions?

Product code: 361404P1

Activity offered by Mareaito Charters via Viator.

Who is this activity suitable for?

Travelers seeking unique natural experiences.
Individuals interested in marine life and phenomena.
Those looking for a memorable evening activity.
Adventurous travelers with a moderate fitness level.

Activity essentials

Swim in a rare bioluminescent bay.
Enjoy a beautiful sunset from a sandbar.
Experience unique natural phenomena.
Small group size for a personalized experience.
Skilled captains ensure a safe and enjoyable trip.
Visit two distinct and beautiful locations.

San Juan: good to know

Population: 342,259 (2020)
Elevation: 34 m
Currency: United States dollar
Driving: on the right
Power plugs: A, B · 120 V
Emergency number: 911
Capital city: Washington, D.C.

Average temperatures

25°Jan
25°Feb
26°Mar
26°Apr
27°May
28°Jun
28°Jul
28°Aug
28°Sept
28°Oct
27°Nov
26°Dec

Sources: Wikidata; climate: NASA POWER, 2001-2025 averages.

Frequently asked questions

Can I swim in the Bio Bay?

Yes, swimming in the Bio Bay is a key part of this tour, allowing you to interact with the bioluminescence.

What should I bring for the tour?

You should bring your swimwear. Towels and snorkeling gear are not included, so you may wish to bring your own if desired.

Is this tour suitable for everyone?

The tour requires a moderate level of physical fitness and is not recommended for travelers with poor cardiovascular health. Service animals are allowed.

What happens if the weather is bad?

The tour may be canceled in case of inclement weather, and you will be offered an alternative date or a full refund.

How far in advance do I need to cancel?

For a full refund, cancellations must be made at least 24 hours before the scheduled departure time.

What is the meeting point?

You will meet in front of La Casita Sea Food. Look for Mareaito Charters on Google Maps. If the main route is closed, go around through Calle 1.

Reviews

4.84.8(362)

5 stars

329

4 stars

3 stars

2 stars

1 star

Reviews provided by Viator, written by travellers on Viator and Tripadvisor.

★★★★★Tripadvisor review
Best bio bay experience
marangelieg2026, October 2026
The tour was about 2 hours long. Thank was was beautiful and warm. Surprisingly. We stopped for a dip at the sand bar. Than went to the bio bay. Probably one of the best experiences. Watching the water glow as I swimmer and looking up at the beautiful stars. It actually felt magical. Ended my trip in the best way possible. Loved every minute of it. Stood in the water as long as I could. I will definitely be doing this again.
★★★★★Tripadvisor review
Sunset Tour and Swimming
287alyssac, September 2026
We did the sunset tour. We got to watch the sunset while swimming on the sandbar. Once it was dark, we moved to the biobay and got to swim with the bioluminescence. It was a great time and I highly recommend this tour!
★★★★★Tripadvisor review
Horrible
kg1029, September 2026
I am appalled by this company. They were located in an area with no parking or facilities. The dock to the boat was a fall risk it was so slimy and slippery. The operators didn’t offer help at any point and were on their phones or sleeping during the time guests were in the water. Everything was so unsafe. We requested a refund because there were no bioluminescence and once they read that, one of the crew pushed my daughter while she was on the slippery dock. Don’t sign their waiver, they will not keep you safe! I would advise staying away!
Response from the operator · hectors426
Thank you for your feedback. Bioluminescence levels depend on natural conditions like moon phase and cloud cover, which we disclose in advance and cannot guarantee on any given night. Our docks are fitted with carpet to prevent slipping. Regarding the claim that a guest was pushed we reviewed video footage of the unloading process and can confirm this did not occur. We’re sorry your experience fell short of expectations
★★★★★Tripadvisor review
Wouldn’t recommend
michaelacg18, September 2026
There was very little bioluminescence. You had to be in the water moving to see it and even then it was very dim. The hosts really couldn’t give a care in the world as they were on their phones the entire time we were docked or were lying down on the boat with their eyes closed (yes, I’m serious). Not safe! We were also unable to go in the water as the ladder was difficult for someone who isn’t able bodied or strong. To boot, at the end of the tour I was almost run off of the dock by a disgruntled crew member who had clearly seen the negative review we wrote while on the tour. Wouldn’t recommend.
Response from the operator · hectors426
Thank you for your feedback. Bioluminescence levels depend on natural conditions like moon phase and cloud cover, which we disclose in advance and cannot guarantee on any given night. Our docks are fitted with carpet to prevent slipping, and our booking instructions specify that guests must be able to climb the boarding ladder unassisted, as this is a requirement for the tour. Regarding the claim that a guest was nearly run off the dock: we reviewed video footage of the unloading process and can confirm this did not occur. We’re sorry your experience fell short of expectations
★★★★★Viator review
Would not reccommend
Michaela_G, September 2026
The water doesn’t glow unless you kick your feet and even then it’s VERY dim. Would not recommend. Additionally, the captains are on their phones the whole time you are anchored. Very unsafe.
Response from the operator · hectors426
Thank you for your feedback. Bioluminescence comes from dinoflagellates that need to be agitated to glow — it’s a natural phenomenon, so brightness can vary from night to night, but it should always be visible, especially when the water is disturbed. We’re sorry it was dim during your visit. Regarding your safety concern — that’s something we take seriously and don’t take lightly. Our captains and deckhands are expected to stay attentive to swimmers and passengers at all times while anchored, not on their phones. We’ll be addressing this directly with the crew involved. We appreciate you bringing it to our attention.

34 activities · Puerto Rico

San Juan, Puerto Rico, has 34 activities, tours and experiences to book. Also worth exploring nearby: Isla Verde, Luquillo, Fajardo, Arecibo.

01Activities to book

The best experiences in San Juan

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Puerto Rico: Bio Bay Swim and Sunset Charter or Late Night Tour

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03On the water

Boats & cruises in San Juan

3 activities

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from €90★ 4.6

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04Categories

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15 activities

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Puerto Rico: Bio Bay Swim and Sunset Charter or Late Night Tour

from €59★ 4.8

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from €73★ 4.8

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from €40★ 4.8

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05Categories

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from €35★ 4.8

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from €63★ 4.7

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from €103★ 4.8

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from €104★ 4.8

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09Explore nearby

Nearby cities

4 cities

Plan your trip

Frequently asked questions about San Juan

What is there to do in San Juan?

San Juan has 34 activities, tours and day trips you can book online. Among the most booked: « Sunset Salsa Beach Class in San Juan », « Puerto Rico: Bio Bay Swim and Sunset Charter or Late Night Tour », « San Juan: Snorkeling with Turtles and Complimentary Videos ».

What are the top-rated activities in San Juan?

According to traveller reviews: « San Juan Catamaran Sunset Sail with Drinks Included » (4.9/5, 691 reviews) ; « El Yunque Rainforest Small Group Tour with Transport » (4.9/5, 1,064 reviews) ; « 3 in 1 Full Day Cueva Ventana, Indian Cave & Waterfall Adventure » (4.9/5, 739 reviews).

Can you cancel an activity in San Juan for free?

Usually, yes: 24 of the 24 most popular activities in San Juan offer free cancellation. The exact terms are shown on each activity page before you book.

What is there to visit near San Juan?

Close to San Juan: Isla Verde, Luquillo, Fajardo, Arecibo.