Water that lights up blue when you move your hand or paddle is one of the most searched things to do in Puerto Escondido. You see it at Manialtepec Lagoon, west of town, on night boat tours.
Where to see it
At Manialtepec Lagoon, about 16 km west of Puerto Escondido on Highway 200 toward Pinotepa Nacional (20 to 30 minutes by car). It is a mangrove lagoon separated from the sea by a sandbar.
What it is
Plankton (tiny organisms in the water) that give off blue light when the water moves. In the dark lagoon it shows far more than in the open sea.
When it is best
On moonless or nearly moonless nights (around the new moon): with a full moon you barely see it. It tends to be stronger in the rainy season, from summer on, but it changes from year to year and week to week. Ask the operator how it looks that week before booking.
How to go and what it costs
The easiest option is a night boat tour of about 2 to 2.5 hours with hotel pickup; online platforms list them from about 45 US dollars per person. With the lagoon's boatmen, a shared boat for a group costs less per person. Some tours let you get in the water to see the glow around you.
What to bring
Swimsuit and a change of clothes if you plan to swim, sandals that can get wet, insect repellent for the mangroves and a light layer for the ride back. The glow hardly shows on phone photos: it is something to see.
Worth it by day too
The lagoon is home to hundreds of bird species (herons, pelicans, ducks) and has boat and kayak trips through the mangroves, best early in the morning.
Approximate prices and times, reviewed in October 2026. Always confirm with the business before you go.
Bioluminescence tours in the directory
ToursFrequently asked questions
Where can you see bioluminescence in Puerto Escondido?
At Manialtepec Lagoon, 20 to 30 minutes west of town on Highway 200. You visit at night by boat.
When is the best time to see the bioluminescence?
Moonless nights (around the new moon) and, in general, the rainy season from summer on. Check with the operator how it looks that week.
How much does the bioluminescence tour cost?
Tours with hotel pickup are listed online from about 45 US dollars per person; local boatmen with a group can be cheaper. Prices are approximate.
Can you swim in the lagoon?
Several tours let you get in the water for a while to see the glow around you. Ask first, and do not do it on your own at night.
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