Leatherback turtle nesting at Playa Grande: what to expect and when to go

By Ana Vargas, updated November 2026

Playa Grande is a major leatherback sea turtle nesting beach, and it is a short walk from Tamarindo. Most people staying nearby never go after dark. That is a genuine miss.

Where Playa Grande is

According to RE/MAX Ocean Surf & Sun's Playa Grande community guide, the beach sits on the western shoreline of Guanacaste province, with Playa Ventanas to the north and Playa Tamarindo to the south. From Tamarindo, you can cross the estuary by boat (a quick, informal shuttle that runs in the evening) or drive around through Huacas. The boat crossing is the faster option if you're already on the Tamarindo side and heading to a night tour.

The two beaches feel different despite being neighbors. Tamarindo has surf schools, restaurants, and a steady stream of visitors. Playa Grande is quieter, noticeably less developed, and much darker at night. That darkness is deliberate: the park manages lighting restrictions in the area because artificial light disorients both nesting females and emerging hatchlings.

The leatherback: the turtle you are going to see

The Rental Escapes Playa Grande guide describes the leatherback sea turtle as the largest sea turtle species on Earth. That description lands differently once you are actually standing near one on a dark beach. These animals can reach lengths of over six feet and weigh as much as a large motorcycle.

Unlike other sea turtles, leatherbacks do not have a hard shell. Their back is covered by a leathery, ridged skin over cartilaginous material, which is how the name came about. Watching one come out of the water and cross the sand in low light is strange in a way that is hard to describe before you have done it. It is a genuinely odd wildlife encounter.

Playa Grande is one of the more important nesting beaches for leatherbacks in the eastern Pacific. A wide, sloped beach and protected status have kept it a consistent nesting site for years.

Las Baulas National Marine Park

The nesting beaches at Playa Grande are protected by Las Baulas National Marine Park, which manages both the terrestrial beach area and the surrounding marine zone. "Las Baulas" is the Spanish name for the leatherback turtle.

The park controls visitor access during nesting season, caps the number of people allowed near a nesting female, and requires a licensed guide for any beach visit. Lighting rules cover both the beach itself and adjacent properties. Artificial light disorients nesting females and hatchlings, so the restrictions are treated seriously.

Leatherback populations on the Pacific coast of Costa Rica have faced pressure from egg poaching, bycatch, and coastal development. The park's rules are a direct response to that history, not bureaucratic formality.

When nesting season runs

According to the Rental Escapes Playa Grande guide, leatherback turtle nesting season runs from October to April, with hatchlings continuing to emerge through April. That is a long window by seasonal wildlife standards, and it means the experience is available across a wide range of travel dates.

Peak nesting activity concentrates in the middle of the season, roughly November through February, when the largest number of females are coming ashore on any given night. Arriving in those months gives you better odds of actually witnessing a nesting event, since tour guides can only take you to a turtle that is actively nesting, and some nights there are many, while others there are few or none.

The very start and end of the season (October and early April) are lower-probability windows, though they have other advantages: fewer visitors, lower accommodation rates in Tamarindo, and for April visits, the chance to witness hatchlings emerging rather than eggs being laid.

Weather during nesting season

Nesting season straddles Costa Rica's two seasons, and the experience differs depending on when you go. The Rental Escapes guide notes that the early nesting months, October and November, fall in the wetter green season, with the afternoon rain typical of that time of year. By night, when tours actually run, conditions are usually calmer, but you should expect the beach to be humid and possibly wet underfoot.

From mid-December through April, the weather shifts. Daytime temperatures average around 90 F (32 C), skies are generally clear, and nights are warm and dry. This is the weather most visitors expect from Costa Rica's Guanacaste coast, and it makes the nighttime beach visit more comfortable from a practical standpoint: you are not fighting rain gear in the dark.

For the nightly tour itself, weather matters less than you might expect. Turtles nest regardless of rain, and the tours run in most conditions. Comfort on the walk from the ranger station to the beach and back is the main practical consideration.

What the guided tour actually involves

Visitors are required to go with a licensed local guide. This is not optional. The guide manages group positioning, keeps lights and phones off when the turtle is present, and decides when a group can approach.

How a tour actually goes: you arrive at the ranger station in the evening, register with the park, and wait. A guide monitors the beach for nesting activity. Once a turtle has progressed far enough in the nesting process that she cannot be disturbed into abandoning the nest, the guide brings a small group to watch from a set distance, without lights, while she lays her eggs, covers the nest, and returns to the water.

The wait varies. Some nights you are watching a turtle shortly after arriving. Other nights you wait for hours and see nothing. That is just how it works, and a sighting after a long wait tends to feel more worth it than one that comes too easily.

Given that tours can run late and the estuary crossing back to Tamarindo does not operate after a certain hour, planning your logistics in advance matters. Ask about the return crossing schedule when you book the tour, and check whether the operator arranges transport.

How to plan the visit from Tamarindo

Staying in Tamarindo makes the logistics straightforward. The estuary boat crossing is the fastest route to Playa Grande, and it runs in the evening to accommodate tour visitors. Most turtle tour operators in Tamarindo handle the transport as part of the package.

Bring dark, neutral-colored clothing for the beach visit. The park requires that no white clothing be worn near the turtles, since the contrast can startle them. Close-toed shoes or sandals with grip are better than flip-flops on an uneven beach at night. Bring a jacket or light layer even in dry season: the beach at midnight is cooler than the town.

Phones on the beach must be in airplane mode and the camera light disabled. Flash photography is prohibited. This is one of those rules that genuinely matters for the conservation program, not just for your group's experience.

If you're staying at Cabinas Marielos, the front desk can point you toward current tour operator contacts and information about the park's current visitor program. Policies and group size limits at Las Baulas can change between seasons, so it's always worth verifying the current setup before you go. The things to do page covers leatherback season alongside other Tamarindo-area activities, and the best time to visit guide goes deeper on how turtle season fits into the overall travel calendar.

Frequently asked questions