Entry No. 03 · Lajas
La Parguera in Lajas is the only bioluminescent bay in Puerto Rico where swimming is allowed, reached by motorboat from the village waterfront.
17.9700° N, 67.0450° W
17.9700° N, 67.0450° W
This is the one bay where you're not just watching the glow from a boat rail. You're moving through it, each stroke lighting up around your own hands.
The only Puerto Rico bio bay where swimming is allowed. Motorboat tours depart from the village waterfront.
Table 1
The almanac
This is the one bay where you get in the water, so two things matter, not one: aim for a new moon, give or take three nights, for the darkest sky, and check the forecast for comfortable swimming conditions. A full moon washes the glow out.
See all six months in the moon calendar →Anno MMXXVI · 2026
New moon and the three nights on either side, when the glow is strongest. Struck dates mark the full moon, when it is weakest.
None of the tour operators provide lodging. This map shows nearby places to stay, ranked how you like: price, distance, or rating.
One of the least expensive swim tours in La Parguera, though the operator's own site publishes little else in the way of reviews or details, so it pays to call ahead with questions.
Field-verified July 15, 2026
The oldest operating tour company we found across all three bays, running since 1987, with a USCG-certified captain at the wheel.
Field-verified July 14, 2026
Founded in 2007 by Capt. Uchy Mendoza, who's had a marine background since 1977, with tiers running from a swim-only trip up to a $525 VIP snorkel package.
Field-verified July 15, 2026
An hour in the water with a USCG-certified captain, reviewed across five different platforms if you want a second opinion before booking.
Field-verified July 14, 2026
Note: most of these operators take direct bookings only. Hook'd on Adventure and Aleli Tours are, per our research, also bookable through third-party platforms like Viator if you prefer booking there.
The operators above are the ones we've individually researched. GetYourGuide and Viator also list La Parguera tours beyond what's covered here, if you want to compare options or prefer booking through a marketplace.
Sponsored links to unconfirmed marketplace search results, not operators we've individually vetted. Affiliate disclosure.
Yes, La Parguera is the only one of the three Puerto Rico bio bays where swimming is allowed, always under your operator's safety briefing.
La Parguera is in Lajas, about 2.5 hours from San Juan by car. No operator offers San Juan pickup, so plan on driving or hiring a private driver.
The same new-moon rule applies here as at the other two bays, with one added variable: this is the one bay where you will be in the water, so also check the weather forecast for comfortable swimming conditions. Check the moon calendar for exact dates.
Tours typically range from $45 to $70 per person, depending on the operator and tour type.