Ancient Giants Return: Leatherback Turtle Season Begins Early on Costa Rica’s Caribbean Coast

Leatherback turtles have arrived 10 days early on Costa Rica's Caribbean coast. Discover how to book night tours in Tortuguero and Cahuita for this 2026 season.

By: AXL Media

Published: Apr 3, 2026, 11:08 AM EDT

Source: The Tico Times

An Unexpected Early Window

Typically expected later in March, the arrival of the leatherbacks in early April 2026 marks a significant biological head start for the season. According to SINAC (National System of Conservation Areas), while Tortuguero is famous for its green turtle population later in the year, the March-to-June window belongs to the leatherback. The early arrival allows visitors to experience these nesting rituals before the heavy tourist crowds of the mid-year summer season arrive.

Witnessing the Gentle Giants

Leatherbacks are the largest reptiles in the ocean, capable of reaching weights up to 1,500 pounds (680 kg) and lengths of 8 feet (2.4 m). Unlike their hard-shelled cousins, they possess a unique, leathery carapace that allows them to dive deeper than any other turtle.

Intimate Nesting: Unlike the massive arribadas (mass arrivals) of Olive Ridleys on the Pacific coast, Caribbean leatherbacks nest individually, making each encounter feel personal and quiet.

Controlled Access: To protect the turtles’ night vision and nesting success, SINAC and local operators utilize a "red-light only" rule. Tours are strictly limited to small groups of 10, led by certified trackers.