Scuba Diving in Costa Rica

What diving in Costa Rica is like

Costa Rica isn't a clear-water, coral-garden destination in the way the Caribbean islands are. Its Pacific coast gets seasonal upwelling, when cool, nutrient-rich water rises from the deep. That water can cut visibility and bring sudden cold layers, but it also feeds plankton, huge schools of fish and the big animals that eat them. Divers come here for mantas, sharks, rays, turtles and schooling fish rather than for colorful hard coral.

It's also a good place to learn. The main beach towns have dive shops teaching PADI, SSI or CMAS courses, and the easy local sites make relaxed training dives.

The main dive areas

Guanacaste: Playas del Coco and Ocotal. The Gulf of Papagayo around Playas del Coco and Playa Ocotal is the country's busiest dive area and the easiest base for most visitors, about half an hour from Liberia's international airport. Dozens of rocky reefs and pinnacles lie a short boat ride from town, with white-tip reef sharks, rays, moray eels, turtles and big schools of fish. Shops such as Rocket Frog Divers run these local sites daily.

The Catalina Islands. A chain of rocky islets off Playa Flamingo, the Catalinas are best known for giant manta rays, which gather mainly from January to April. Trips run from Coco, Ocotal, Flamingo and Tamarindo.

The Bat Islands. In Santa Rosa National Park's marine sector, the Bat Islands are where experienced divers go to see bull sharks. Diving is allowed only at 3 sites, dives are deep, and the trip depends on the dry-season winds, so it usually runs best from about May to November.

Southern Nicoya: Tortuga Island. In the Gulf of Nicoya, Tortuga Island has rocky reefs, caves and drift dives with reef fish, rays and white-tip reef sharks. Montezuma Crew runs private dives there from Tambor.

South Pacific: Isla del Caño. Off the Osa Peninsula, the Isla del Caño Biological Reserve protects some of the best coral reefs on the Pacific coast. Visits need a registered guide and a prepaid reservation, and boats leave from Drake Bay, Sierpe and Uvita.

Cocos Island. More than 500 km offshore, Cocos Island is reached only by liveaboard from Puntarenas. It's famous for schooling hammerheads and is one of the best big-animal dives in the world. The 2026 park rules cap dive groups at 13 including a divemaster and end all dives by 5 pm.

The Caribbean: Cahuita and Manzanillo. Cahuita National Park was created to protect what its official map calls the most important coral reef in the country, about 600 hectares of it. Diving and snorkeling there are allowed only in marked areas, and most visitors go with a local guide. Farther south, the Gandoca-Manzanillo refuge has reefs off Manzanillo. Rivers carry sediment onto these reefs after heavy rain, so visibility varies.

When to go

There's diving all year, but conditions vary by region:

• Guanacaste. The dry season, roughly December to April, brings sunshine but also strong Papagayo winds and cooler, sometimes greener water from upwelling. The rainy months from May to November often bring warmer water and calmer seas offshore, and that's when the Bat Islands are usually most reliable. Manta season at the Catalinas is mainly January to April.
• South Pacific. Isla del Caño can be dived all year. SINAC lists January to April as the drier months, when seas are often calmer.
• Cocos Island. Liveaboards run all year; ask operators about recent sightings for your dates.
• Caribbean. Calm, clear spells are the key, and local shops are the best guide to when they happen.

Planning tips

• Bring your card and logbook. Shops will ask, especially for the Bat Islands and Cocos.
• Get dive insurance. It's required by some operators and wise everywhere, especially for remote trips.
• Plan your flight. The Divers Alert Network recommends waiting at least 12 hours after a single no-decompression dive before flying, and at least 18 hours after multiple dives or multiple days of diving. Many divers simply keep the last day dry. The drive from the coast to San José also climbs into the mountains, which counts as altitude.
• Mix it with fishing. Coco, Flamingo, Tamarindo, Quepos and Drake Bay all have both dive shops and fishing charters, so it's easy to split a trip. Cocos and Caño are no-fishing reserves.

Learn more

Our sister site scuba.cr covers Costa Rica's dive sites, shops and marine life in depth. If you'd rather stay near the surface, see our snorkeling guide.