Oceans & Turtles
Leatherback Season Opens on Costa Rica's Caribbean Coast for 2026
Leatherback sea turtles began nesting on Costa Rica's Caribbean beaches in spring 2026. What's known about the season, the species and guided viewing.
Green travel guide
Ethical volunteering in Costa Rica means joining a project that actually needs your help, trains and supervises you, and protects wildlife and local jobs. Long-running groups such as Turtle Love, Sea Turtle Conservancy, Osa Conservation, Corcovado Foundation and ASVO run structured programs with named staff and clear rules. Avoid anything that promises hands-on contact with wild animals or short visits to children's institutions.
You might arrive dreaming of saving turtles or planting a rainforest. The people who actually do this work spend most of their time checking data sheets, walking hot beaches at night, fixing equipment and keeping local staff paid.
Costa Rica draws a lot of people who want to do more than look at wildlife. Volunteers help with sea turtle patrols, tree nurseries, camera traps, farm work, school outreach and beach cleanups. Some programs are well run and genuinely useful. Others are pricey adventure holidays with conservation language stuck on.
The difference isn't how good your photos look. It's whether the project needs what you can offer, can supervise you properly, protects the animals and people involved, and keeps going long after you fly home. The easiest way to judge that is to learn who runs the work before you sign up. Here are some of the people and programs worth knowing, and the questions that will help you choose well.
Turtle Love works on Playa Tres, a 5 km nesting beach just south of Tortuguero National Park on the Caribbean coast. It monitors nesting and poaching, runs outreach in local schools, helps families build income that doesn't depend on turtle eggs, and shares its data with MINAE, the environment ministry.
Its team page names Renato Bruno (president and scientific director), Gustavo Ortiz (field coordinator) and Ángela Méndez (outreach coordinator), plus field assistants Gloria Guerrero, Emmanuel Bello, James Arce and Braulio Piedra. Those names matter. A volunteer might stay a week; the field team is there when the weather turns, nesting is slow or a boat needs fixing. A good program supports those jobs instead of replacing them with a rotating cast of visitors.
The volunteer page is refreshingly specific. Night patrols run 4 to 5 hours, dawn surveys cover about 10 km of beach, and volunteers get a briefing before their first shift. Hands-on work with turtles, such as measuring shells, comes only after a week of training and supervised practice. Volunteers stay at a biological station, and start dates run from February through November. The team is also honest that "we cannot guarantee sea turtle nesting or hatching activity on every survey." That's what a real research program sounds like. Fees and terms change, so check the current page rather than an old price list.
The Sea Turtle Conservancy is one of the best-known turtle groups working in Costa Rica, and its team page shows how many different jobs it takes to keep a research station going. It lists Roxana Silman as Costa Rica director, Rocío Macías Nieto as Tortuguero field coordinator, Daniel Bolom as station manager, Gisel Barroso as environmental education and outreach coordinator, and Mary Duncan as visitor center coordinator.
Each role is a different piece of the puzzle: careful data collection, station logistics, work with local families, and clear explanations for visitors. That's also the limit of voluntourism ads. Not everyone is qualified to handle a nesting turtle or take scientific measurements. STC promotes an Eco-Volunteer Program in Costa Rica or Panama on its homepage; check there for current sessions and requirements.
The right first question for any turtle project isn't "Can I hold a hatchling?" It's "Where would my skills save your team time without putting the work at risk?" For more on how turtle projects work, see our sea turtle conservation guide and the news on leatherbacks arriving early on the Caribbean coast.
On the Osa Peninsula, Osa Conservation hosts volunteers at its conservation campus between Corcovado National Park and Puerto Jiménez. Depending on the season and team needs, volunteers help with sea turtle patrols, native tree planting, camera trap work and night surveys, six days a week.
The team page shows how broad the work is. Rodrigo De Sousa manages the tropical forests program and Guido Saborío is rewilding manager. Two roles rarely featured in volunteer marketing stand out: Mairón "Titi" Ibarra, tree nursery manager, and Keitly Rodríguez, community processes coordinator. A nursery manager tracking which seedlings survive, and a coordinator working with landowners on planting, may do more lasting good than any one-day ceremonial tree planting. (As of this writing, the page lists Melissa Aubert as interim executive director while a search is under way.)
When we checked, Osa's published rates were still labeled for 2023 and 2024 reservations, so confirm current terms directly. Also ask whether a spot is open for your dates and what gear and fitness the work needs. Rubber boots are required on the trails. Our guide to reforestation in Costa Rica explains why survival rates matter more than planting numbers.
Despite its name, the Corcovado Foundation runs its sea turtle volunteer program on the Central Pacific, at Playa Palo Seco in Parrita. Its wider work covers environmental education, sustainable tourism and support for national parks on the Osa Peninsula. Francisco Delgado Mena has been executive director since the board named him in February 2024, and Zoraida Tenorio, who joined in 2010, coordinates the volunteer program, according to its team page.
The foundation's 2026 volunteer details are clear: placements run from July 1 to December 15, the minimum stay is 2 weeks, volunteers must be at least 18, in good physical shape for 4 to 6 hours of work in tough weather, speak basic Spanish or English, and carry medical travel insurance. Biologists work alongside volunteers on night patrols, nest relocation and data collection. Treat these as program terms, not immigration advice, and confirm them before booking.
ASVO (Asociación de Voluntarios al Servicio de las Áreas Silvestres Protegidas) has connected Costa Rican and international volunteers with protected areas since 1989. It lists permanent stations at Playa Buena Vista in Guanacaste, Montezuma and Tortuguero, with work ranging from turtle protection and reforestation to beach cleanups and community events. It also lists short options for people with at least 3 free days, and work with parks such as Poás, Irazú, Braulio Carrillo and Corcovado, where requirements and availability vary. It's a good fit if you want to support the park system itself.
Not every worthwhile placement involves endangered wildlife. In Mastatal, in the hills of Puriscal, Rancho Mastatal has taught tropical living skills since 2001: permaculture, natural building, timber framing and cooking. Founder Tim O'Hara started it with his wife, Robin, after moving from Seattle, according to a 2020 UNC Kenan-Flagler profile. The ranch offers courses, internships and a year-long apprenticeship, and its work-trade spots are skill-based: one current posting seeks professional arborists for the dry season.
That's the right model. Courses and apprenticeships are learning programs, and work trades want specific skills. Also in Mastatal, family-run La Iguana Chocolate says it ended its volunteer program after about a decade and now hosts students, groups and cacao courses instead. Programs change, so never assume a farm takes volunteers. See our guide to regenerative and organic farms for places to visit and learn.
The most emotionally appealing ads deserve the hardest look:
Local communities aren't a backdrop for a personal transformation story. A beach cleanup should follow the local waste plan. A tree planting needs someone to care for the seedlings for years. A classroom should serve the kids and teachers who are there all year.
Start with yourself: your language skills, fitness, specialist knowledge, comfort with heat, bugs and remote conditions, and how long you can really stay. Then ask any operator these questions:
Seasons matter too. On the Caribbean, leatherbacks nest mainly in spring and green turtles mainly from about June to October, while many Pacific programs, like Palo Seco, run from mid-year to December. The Pacific's mass olive ridley nestings at Ostional are managed by the local community and guides; read about one of 2026's biggest arribadas.
Finally, check the rules for your stay with Costa Rica's immigration authority. Being unpaid doesn't make every activity or length of stay automatically allowed on a tourist entry.
If your trip is too short for proper training, you can still be useful. Take a responsible guided visit, donate through an organization's official page, buy from the community businesses that support conservation, or join a local planting day like the one behind Curridabat's pocket forest. Supporting trained Costa Rican professionals, such as the officials learning how to care for rescued wildlife, often goes further than a weekend of unsupervised work.
Find turtle projects on the map under turtle conservation and protected areas under reserves, and browse more places in the Pura-Verde directory. For bigger-picture reading, see our guide to nature reserves and wildlife corridors. The work belongs to Costa Rica's people and ecosystems. The best contribution is the one that's still useful after you've gone home.
Pick an established project with named local staff, real training, clear rules on wildlife contact and transparent fees, and stay long enough to be useful. Avoid programs built around touching animals or short visits to children.
Yes. Groups such as Turtle Love near Tortuguero, the Sea Turtle Conservancy, Osa Conservation, Corcovado Foundation at Playa Palo Seco, and ASVO run turtle programs. Expect night patrols, data work and no guaranteed sightings.
It depends on the program. When we checked, Turtle Love accepted stays from 3 nights, Corcovado Foundation's turtle program required 2 weeks, and Osa Conservation listed stays starting at 1 to 2 weeks. Longer stays usually mean more useful work.
Usually not for entry-level work, but good programs train you first and limit what beginners do. Turtle Love, for example, requires a week of training before hands-on turtle work.
Generally no. Rescue centers focused on release keep human contact to a minimum, and hands-on photo sessions are a common sign that a place puts tourists first.
It depends on your nationality, the activity and how long you'll stay. Check current rules with Costa Rica's immigration authority and ask the program what it requires.
We checked these pages when we last updated this guide. We didn't interview the people named; their roles and words come from the sources above.
Oceans & Turtles
Leatherback sea turtles began nesting on Costa Rica's Caribbean beaches in spring 2026. What's known about the season, the species and guided viewing.
Oceans & Turtles
Thousands of olive ridley turtles nested at Ostional from Sept. 4, 2026, in one of the year's biggest arribadas, followed by a second long event mid-month.
Oceans & Turtles
Marine biologist Daniel Arauz says beachfront lights and noise are pushing nesting turtles off busy Costa Rican beaches like Tamarindo and Santa Teresa.
Wildlife
Humane World for Animals and Costa Rica's environmental security commission trained 150 officials in April 2026 to handle wildlife seized from traffickers.
Forests
About 200 volunteers planted Bosque Tacaco, a 515-square-meter Miyawaki pocket forest of 74 native species, in Curridabat on Aug. 21, 2026.
Guide
Find beach cleanups and river restoration days in Costa Rica, from Tamarindo's Clean Wave to San José's Río Torres, and learn which ones do real good.
Guide
Which Costa Rica research stations you can visit, stay at or support, from La Selva and Las Cruces to Caño Palma, Monteverde and Guanacaste.
Guide
Meet the field teams and local guides protecting sea turtles in Tortuguero, Ostional and Nicoya, and learn how to see nesting turtles responsibly.