The climate has a distinct wet and dry season, with the rains occurring mainly between June and November. During this time the conditions are warm and humid, with vegetation being very green. During the dry season the temperature is higher and humidity is quite low. The turtle nesting season begins in the late part of the wet season, so that by the time the hatchlings begin to emerge the rainy season is over and the sand is quite dry.

Playas Grande, Ventanas and Langosta form the park and are under the control of MINAE and its local park administrators. Development within the park is not permitted, and entry of persons at night during the turtle nesting season is restricted.

The town of Tamarindo is located to the south of Las Baulas, across the Tamarindo Estuary. Tamarindo is a popular tourist destination and many of the visitors to Las Baulas stay there. The Tamarindo Estuary is a RAMSAR site (wetland of International Importance) and entry is restricted. The mangrove estuary contains a wide variety of native animals, including crocodiles, fish, crabs and many species of birds. The area surrounding Las Baulas is mainly agricultural land, but there are pockets of undisturbed forest left. These are home to howler monkeys, armadillo, vultures, racoons, coyotes and many other animals and plants.