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Puerto Rico Bioluminescent Bay Guide

Visiting The Bioluminiscent Bays Of Puerto Rico

Updated August 2022

Puerto Rico Bioluminescents Bay Guide
Puerto Rico Bioluminescent Bay Guide

The Bioluminescent Bays Of Puerto Rico

There are five known bioluminescent bays in the world, three of which are in Puerto Rico—Vieques, Laguna Grande, and La Parguera. They are a unique attraction that shouldn’t be missed, and visiting them is the perfect nighttime adventure. Pictures can’t do them justice as they are truly a sight to see.

Puerto Rico Map

Puerto Rico Map

Puerto Rico Bioluminescents Bay Guide
Puerto Rico Bioluminescent Bay Guide

What is a Bioluminescent Bay?

The water in bioluminescent bays can be as bright as stars and light up thanks to millions of single celled microorganisms called dinoflagellates. Whenever these microorganisms are disturbed in the water from a paddle, a swimmer’s arms, or a boat motor coming by, they glow a neon blue!

Dinoflagellates can also be found in oceans, but they are more concentrated in the bays, so the glow is far more noticeable. Going to a bay with minimum light pollution is essential.

Puerto Rico Bioluminescent Bay Guide
Puerto Rico Bioluminescent Bay Guide

When to Visit a Bioluminescent Bay

The three bioluminescent bays in Puerto Rico light up year round. However, the best time of year to see the bioluminescence is during the country’s dry season, from December to April.

Rain can make the waters murky and challenging for the light to shine through, so its advised not to go during or after a shower.

The dry season is also the most popular time to visit the island of Puerto Rico, so there are high numbers of tourists around. Be sure to book your bioluminescent bay tour early!

Puerto Rico Bioluminescent Bay Guide
Puerto Rico Bioluminescent Bay Guide

What are the Three Bioluminescent Bays in Puerto Rico

Which of the three bioluminescent bays should you visit on your next trip to Puerto Rico? Here is a little more information to help you decide.

Puerto Rico Bioluminescent Bay Guide
Puerto Rico Bioluminescent Bay Guide

Vieques

Vieques is a beautiful island off the east coast of Puerto Rico, accessible by ferry from the mainland. The brightest bay in Puerto Rico, Mosquito Bay on Vieques, has some of the best views for dinoflagellates.

Known as the “brightest bay in the world,” it is truly a magical place to visit and experience on the island of Vieques. The tours here are less crowded, the island is lovely, and you’re sure to make some great memories.

  Check out this excellent Bioluminescent Bay Kayak Trip From Vieques.

   Or take a look at all of the other Bioluminescent Tours of Vieques.

Puerto Rico Bioluminescent Bay Guide
Puerto Rico Bioluminescent Bay Guide

Laguna Grande

Located on Puerto Rico’s east coast near the capital city of San Juan, you can easily book a kayak or small motorboat tour of Laguna Grande and the adjacent mangrove canal.

San Juan is a popular tourist destination, so this may be the most accessible bioluminescent bay to visit if you’re in San Juan or the El Yunque area.

  Bioluminescent Tours abound in Laguna Grande! Check out all of these amazing bioluminescent tour options.

   Take a look at these tours that stand out for excellence in Laguna Grande. Check out this Bio Bay Kayak Tour In Puerto Rico or this Bio Bay Kayak Tour In Fajardo.

Puerto Rico Bioluminescent Bay Guide
Puerto Rico Bioluminescent Bay Guide

La Parguera

On the west coast of Puerto Rico is La Parguera bay, which has been the main attraction of this part of Puerto Rico for a long time.

Unfortunately, it is the least bright of the bays due to hazy water, and there was a restriction on tours coming to the area so it could heal for a couple of years. As a result, tour companies now only take small groups in small boats to the area, with kayaking always being an option as well.

 Check out these excellent tours Sunset and Bio Bay La Parguera or La Parguera Glowing Bioluminescent Bay Boat Tour.

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