Diving in Costa Rica’s Caribbean: Best Sites and Seasons

Scuba diving in Costa Rica is mostly a Pacific story: Caño Island, the Catalina and Bat Islands, and Cocos Island draw most divers. The Caribbean coast is different. It has the country’s main coral reefs, shallow and warm, off Cahuita, Punta Uva and Manzanillo. The best months are September and October, with a second window from about February to April. Rain can cloud the water for a day or two at a time.

This guide is for divers and snorkelers planning time on Costa Rica’s southern Caribbean coast. It covers where to dive and snorkel, when visibility is best, what you’ll see, costs and courses, and how the Caribbean compares with the Pacific.

Caribbean diving	At a glance
Main areas	Cahuita National Park, Punta Uva, Manzanillo and the Gandoca-Manzanillo Wildlife Refuge
Type of diving	Shallow coral reefs; easy conditions on calm days
Best months	September and October; second window about February to April
Water temperature	About 81°F to 84°F (27°C to 29°C) year-round
Visibility	Up to about 80 feet (25 meters) on the best days; near zero for a day or two after heavy rain
Base towns	Cahuita, Puerto Viejo, Punta Uva
From San José	About 3.5 to 4.5 hours by road

Caribbean vs. Pacific

Diving in Costa Rica: Caribbean or Pacific?

Pick the coast by what you want to see.

• Pacific: big animals. Rocky volcanic sites, schools of fish, white-tip reef sharks, rays and, in season, manta rays and bull sharks. Most dive trips and shops are here.
• Caribbean: coral. Shallow fringing reefs with sponges, sea fans, reef fish, lobsters and the occasional nurse shark. Fewer operators, smaller boats and a laid-back Afro-Caribbean coast to stay on.

Area	Best for	Season
Cahuita, Punta Uva, Manzanillo (Caribbean)	Shallow coral reefs, snorkeling, beginners on calm days	September–October; February–April
Gulf of Papagayo and Catalina Islands (North Pacific)	Training dives, manta rays at the Catalinas	December–April for visibility and mantas
Bat Islands (North Pacific)	Bull sharks; advanced divers only	About May–November
Caño Island (South Pacific)	The most consistent visibility in the country, reef sharks, rays	December–April is clearest
Cocos Island	Hammerheads and big pelagics; experienced divers on liveaboards	Year-round trips of 8 to 12 days

For the Pacific options, see our guides to Caño Island and Marino Ballena National Park.

Where to go

Best Diving and Snorkeling on the Caribbean Coast

Cahuita National Park

Cahuita protects the best-developed coral reef on Costa Rica’s Caribbean coast, with brain, elkhorn and staghorn corals close to shore. It’s best known as a snorkeling reef. To snorkel the main reef off Punta Cahuita, you need a certified guide; tours leave by boat from Cahuita village and usually run about two hours. The Kelly Creek entrance in the village works on a donation; the Puerto Vargas entrance farther south charges a fee.

Two old wrecks lie in shallow water off the park. In 2025, archaeologists confirmed they are the Danish slave ships Fridericus Quartus and Christianus Quintus, lost here in 1710. Cannons and the yellow bricks the ships carried still lie on the seabed.

Punta Uva

About 8 kilometers south of Puerto Viejo, Punta Uva has reef close enough to snorkel from the beach on flat days. Look for parrotfish and sergeant majors near shore, and octopus and moray eels in the rocks. Skip it when there’s swell or the water looks brown. Dive boats also run from Punta Uva to deeper reefs in the Gandoca-Manzanillo refuge, just minutes offshore.

Manzanillo and the Gandoca-Manzanillo Wildlife Refuge

At the end of the coast road, about 13 kilometers south of Puerto Viejo, Manzanillo sits inside the Gandoca-Manzanillo Wildlife Refuge. Its reefs hold sea fans, sponges, angelfish, parrotfish, lobsters, rays and nurse sharks. Most scuba trips on this coast go here, by boat from Punta Uva or Manzanillo. Boat trips in the area also often spot bottlenose and tucuxi dolphins. Punta Mona, a point at the southern end of the refuge, is reached by boat or a long trail from Manzanillo.

Planning where to stay? See our Puerto Viejo travel guide and our picks for hotels on the Caribbean coast.

Timing

Best Time for Diving on the Caribbean Coast

The Caribbean doesn’t follow the Pacific’s dry and rainy seasons, so a good month here can be a wet one on the other coast.

• September and October: the best window. Seas are usually calm and there’s little runoff, so visibility peaks.
• February to April: a reliable second window.
• November to January: swell and rain make visibility hard to count on, and the Caribbean surf season starts around December.
• June to August: mixed. Runoff from rain reduces visibility, but calm days happen.

Heavy rain sends silt down the rivers, and nearshore visibility can drop close to zero for 24 to 48 hours. Keep a flexible day in your plans, and go early; mornings are usually calmer. Water stays about 81°F to 84°F (27°C to 29°C), so a thin wetsuit or rash guard is enough.

Underwater

What You’ll See

• Corals and invertebrates: brain, elkhorn and staghorn corals, sea fans, sponges, anemones, urchins, sea cucumbers and lobsters
• Reef fish: parrotfish, angelfish, sergeant majors and butterflyfish
• Bigger animals: nurse sharks, stingrays, moray eels and sea turtles
• From the boat: dolphins around Manzanillo

Don’t expect the big shark and manta encounters of the Pacific islands. The Caribbean’s appeal is shallow, colorful reef in warm water. To learn more about the turtles you may see, read our guide to sea turtle nesting sites in Costa Rica.

Costs

Costs, Courses and Booking

Option	Typical cost
Guided snorkel tour, Cahuita	About $35–$55 per person
Snorkel gear rental	About $5–$15 per day
Two-tank boat dive (local reefs, Costa Rica)	About $80–$120
Intro dive for non-certified beginners	About $100–$200; minimum age 10
Open Water certification	About $350–$550, 2 to 4 days

• Certification: bring your card or app login. Certified-diver trips require it.
• Booking: shops in Cahuita, Puerto Viejo and Punta Uva run dives. Book a couple of days ahead, and expect start times to shift with tides and sea conditions.
• Insurance: check that your travel insurance covers scuba, or buy dive-specific coverage. See do you need travel medical insurance for Costa Rica.
• Sun protection: use reef-safe sunscreen and a rash guard. See our Costa Rica packing list.

Getting there

Getting to the Caribbean Coast

From San José, take Route 32 east through Braulio Carrillo National Park to Limón, then south along the coast. Plan on about 3.5 to 4.5 hours to Cahuita or Puerto Viejo. Buses run from San José, and shuttles connect the coast with San José and other tourist towns. See our Costa Rica bus guide. For background on the region, read about Afro-Caribbean culture in Costa Rica and the history of Limón.

Reef care

Protect the Reef

These reefs are under pressure. A 1991 earthquake lifted part of Cahuita’s reef out of the water, where it died, and silt and farm runoff from inland rivers block the light corals need. Don’t touch or stand on coral, keep fins off the bottom, never feed fish, and book with operators who brief you on reef rules.

Avoid these

Common Mistakes

• Planning a one-day visit right after heavy rain.
• Expecting Pacific-style shark and manta encounters.
• Snorkeling the main Cahuita reef without a guide.
• Booking dives for December or January and counting on clear water.
• Diving and flying on the same day.

FAQ

Diving in Costa Rica FAQ