Vieques Bio Bay Tour: Mosquito Bay, glowing beneath your clear kayak.

It is a guided night paddle on Mosquito Bay, Vieques, in two-person clear-bottom kayaks. It costs $85 per person and takes about 1.5 hours, with 45 minutes to 1 hour on the water and the van from Esperanza to the bay and back included. Ages 3 and up can join.

No. Mosquito Bay is on the island of Vieques, a ferry or flight from the main island of Puerto Rico. Book this tour for a night you are staying on Vieques. Staying in San Juan or on the east coast? The Fajardo Bio Bay kayak tour is the one for you.

No. The tour runs after dark, and there is no same-day ferry back to the main island after it ends, so plan at least one night on Vieques. Staying in San Juan? Book the Fajardo Bio Bay instead: hotel pickup is available and no ferry is needed.

Take the ferry from Ceiba or a short flight to Vieques. Visitors generally travel on the ferry without a car, so arrange a taxi or rental on the island. Buy ferry tickets ahead on the official Puerto Rico Ferry site.

The tour meets in Esperanza, the small waterfront town on the south coast of Vieques. Arrive 15 minutes before your start time. Your confirmation has the exact meeting point, and the van takes you from Esperanza to Mosquito Bay and back.

Mosquito Bay holds huge numbers of dinoflagellates, tiny organisms that glow blue-green whenever the water moves. Its narrow mouth keeps them in the bay, and the mangroves around it feed them. Guinness World Records lists Mosquito Bay as the brightest bioluminescent bay.

Yes. A clear-bottom kayak has a see-through hull, so you see the glow beneath you as well as around your paddle. Each kayak seats two, so couples, friends and parents with kids paddle together while your guide leads the group.

No. Swimming is not allowed in Mosquito Bay, which is a protected natural reserve. A kayak is the best way to see the glow up close: trail your hand in the water and watch it light up, or look down through the clear hull.

The best time is a dark night near the new moon, when the sky is darkest and the glow stands out most. Check a moon calendar when you pick your dates, then book the tour, your ferry and your room on Vieques. Booking early in your stay leaves a spare night if clouds roll in.

The better bio bay is the one that fits where you are staying. Staying on Vieques? Mosquito Bay is minutes from Esperanza, so this clear kayak tour is the easy pick. Staying in San Juan or on the east coast? The Fajardo Bio Bay glows all year, with hotel pickup and no ferry.

Yes, ages 3 and up can join, and kids paddle in a two-person kayak with an adult. Little ones love watching the water light up under the clear hull. Booking with young children? Message us and we will help you pick a start time.

Yes. Each paddler can weigh up to 240 lbs. The limit keeps each two-person kayak stable and easy to steer in the dark, so everyone enjoys a smooth paddle. If you have questions about your group or who should share a kayak, message us before booking.

Wear a swimsuit or light clothes that can get wet, with sandals that slip off easily. You step through soft mud at the launch, so leave nice shoes at your hotel. Skip DEET repellent, since the bay is a protected reserve, and bring only what you need on the water.

Yes, the tour runs in light rain, and the bay still glows, often beautifully against a dark, cloudy sky. If the weather turns dangerous, the tour is called off and you choose a new date or a full refund. Booking early in your Vieques stay leaves room for another night.

Yes. Cancel the Vieques bio bay tour up to 24 hours before your start time for a full refund. If we ever cancel, for weather or any other reason, you choose a full refund or a new date, so you can book now and reserve your kayak as soon as your Vieques stay is set. The cancellation policy has every detail.