Diving in Costa Rica
Including Cocos Island National Park, Gulf of Papagayo, and Isla del Caño Biological Reserve. On the map.
The vibe
Diving here is defined by the thrill of big-animal encounters, where you are often drifting in currents alongside massive schools of jacks or patrolling sharks. The best conditions for deep-water clarity occur during the dry season, though the nutrient-rich currents that bring the wildlife are present throughout the year. It feels like a serious, gear-focused excursion, with most operators running professional, boat-based trips that cater to those looking for a dedicated underwater adventure.
certification required
Cocos Island National Park
Puntarenas Province
Kris Mikael Krister / Wikimedia Commons (CC BY 3.0)
World-renowned for pelagic action, Cocos Island features deep oceanic cleaning stations where hundreds of scalloped hammerhead sharks, manta rays, and whale sharks congregate. Strong currents and dramatic drop-offs make this liveaboard-only destination a bucket-list adventure for advanced divers.
Access. Accessible exclusively via 36-hour liveaboard departures from Puntarenas; advanced open water certification and logged cold-water/current experience required.
Notes. Depths range from 20 to 40+ meters; strong currents and surge are common. Strict national park fees apply.
Gulf of Papagayo
Guanacaste
Earth Science and Remote Sensing Unit, NASA Johnson Space Center / Wikimedia Commons (Public domain)
Known for volcanic rock formations, underwater pinnacles, and rich nutrient-upwelling currents, the Gulf of Papagayo attracts giant manta rays, eagle rays, and schooling fish. Sites like Bat Islands (Islas Murciélago) even offer thrilling encounters with bull sharks.
Access. Easily accessible via numerous dive shops located along the Playas del Coco, Playa Hermosa, and Papagayo Peninsula resort areas.
Notes. Depths from 15 to 35 meters; some advanced sites feature strong currents and seasonal thermoclines.
Isla del Caño Biological Reserve
Puntarenas Province
Kris Mikael Krister / Wikimedia Commons (CC BY 3.0)
Located off the Osa Peninsula, this protected marine reserve offers vibrant rocky reefs teeming with white-tip reef sharks, mobula rays, sea turtles, and massive schools of jack fish. Crystal-clear waters and thriving coral formations provide exceptional biodiversity for intermediate divers.
Access. Book day-trip dive boats from Drake Bay or Uvita; boats take approximately 45 to 60 minutes depending on the departure point.
Notes. Depths range from 12 to 30 meters; seasonal currents vary. National park entry and diving permits are required.
Puerto Viejo (Carribean)
Limón Province
Aude / Wikimedia Commons (CC BY-SA 4.0)
The southern Caribbean coast of Costa Rica offers vibrant coral reef diving along the Gandoca-Manzanillo National Wildlife Refuge. Divers explore shallow reef formations, ledges, and caverns teeming with nurse sharks, rays, and colorful reef fish. Conditions here contrast sharply with the Pacific, offering warm, clear Caribbean waters during calm weather windows.
Access. Book scuba excursions through local dive operators based in Puerto Viejo de Talamanca, who navigate to nearby barrier reef sites by boat.
Notes. Diving is heavily weather-dependent, with the best visibility and calmest seas occurring during the Caribbean dry months of September and October.
Tamarindo
Guanacaste
Tamarindo — Wikidata / Wikimedia Commons
Scuba diving from Tamarindo centers around rich rocky reefs and submerged islands such as Islas Catalinas, renowned for giant Pacific manta rays. Divers experience dramatic underwater topography with swim-throughs, white-tip reef sharks, and huge schools of tropical fish. Several professional dive operators run fast boats directly to the cleaning stations.
Access. Easily bookable via multiple established dive centers in Tamarindo town, with boat departures typically launching from nearby Flamingo or Playa Potrero.
Notes. Depths range from 18 to 30 meters. Visibility varies by season, peaking from May through November when pelagic activity is highest.