Costa Rica’s Pacific coast hides one of Central America’s great diving secrets — and from Vista Bendita, the best of it is within day-trip reach. An hour or so offshore lies Caño Island, home to the finest diving on mainland Costa Rica: coral pinnacles patrolled by reef sharks, caves stacked with resting whitetips, and seasonal visits from giant manta rays and the occasional whale shark. And far beyond it, out where the open Pacific turns deep and wild, sits the legendary Cocos Island — a place Jacques Cousteau called one of the most beautiful islands in the world, and many divers call the best dive site on Earth. This guide covers the dive sites you can actually reach from Ojochal, what you’ll see at each, and the bucket-list giant waiting at the end.
If you’re still mapping out your whole trip, our overview of what to do in Ojochal and the Osa Peninsula is a good place to start, and divers will also want to read our guides to islands, bays & boat-access beaches and the best beaches near Ojochal.
The Day-Trip Diving: Caño Island
For divers based on the Costa Ballena, essentially all day-trip diving centers on Caño Island Biological Reserve, reached by boat (about 60–90 minutes) from Uvita or, more commonly for divers, from Sierpe/Drake Bay. The waters here hold the largest concentration of reef-building coral on Costa Rica’s Pacific side, and the island offers roughly 15–20 dive sites with remarkable variety: coral gardens, towering rock pinnacles, sand channels, swim-throughs, caves, and arches. Visibility is normally very good — regularly reaching around 30 meters (100 ft) in season — and the water is a warm 21–30°C.
Below are the standout sites, roughly from gentlest to most advanced. For the island’s geology, archaeology (those mysterious stone spheres), and the snorkeling-focused experience, see our dedicated Caño Island and boat-access guide.
Coral Garden (Jardín de Coral) — Beginner / Last Dive
Depth: ~5–12 m (13–40 ft). A shallow, calm, current-light site featuring a beautiful, profuse hard-coral garden — exactly what its name promises. Because it’s gentle and shallow, it’s often chosen as the last dive of the day and is a favorite for newer divers and night dives.
Scenery: Colorful hard-coral beds, easy terrain.
Fish & life: A profusion of tropical reef fish — parrotfish, angelfish, butterflyfish, damselfish — drifting over the coral.
Cueva del Tiburón (Shark Cave) — Easy / Intermediate
Depth: ~10–15 m (33–55 ft). The closest dive site to the island and one of the most reliably thrilling. A small cave shelters a group of resting whitetip reef sharks — often around ten at a time, stacked together in the daytime. You don’t enter the cave; you swim close enough to watch the sharks inside, an unforgettable and surprisingly relaxed encounter in calm, shallow water.
Scenery: Coral formations around a shallow cave.
Fish & life: Resting whitetip reef sharks, parrotfish, damselfish, and an exceptional variety of moray eels (five-plus species).
El Barco Hundido (“The Shipwreck” / El Sharko) — Intermediate
Depth: ~12–22 m (40–72 ft). Despite the name (“sunken boat”), this is not a wreck dive — the original boat is long gone, and it’s now a rock formation that draws huge schools of fish.
Scenery: Rocky reef structure that aggregates schooling fish.
Fish & life: Large groupers, big schools of grunts, scorpionfish, sea turtles, manta rays, and plenty of sharks.
Los Arcos & Paraíso — Intermediate
Depth: ~10–18 m (30–55 ft). Los Arcos (“The Arches”) is a dramatic site of natural rock arches and swim-throughs — finning through these imposing underwater formations is a highlight in itself. Paraíso (“Paradise”) is another favorite of dive crews, rich in reef life.
Scenery: Arches, tunnels, and swim-throughs through volcanic rock.
Fish & life: Reef fish, rays, turtles, and schooling species moving through the structures.
Devil’s Rock (Roca del Diablo) — Intermediate / Advanced
Depth: ~18–35 m (60–115 ft). An extension on the northwest of the same platform as Bajo del Diablo, known for abundant tropical fish life alongside bigger animals.
Scenery: Rock platform dropping into deeper water.
Fish & life: Whitetip and nurse sharks, moray eels, mobula and manta rays, plus game fish like tuna and wahoo.
Bajo del Diablo (Devil’s Pinnacle) — Advanced / The Crown Jewel
Depth: ~5 m at the shallowest pinnacle top, descending rapidly past 18–25 m, with the deeper “Bajo del Diablo Deep” exceeding 20–35 m (and pinnacles rising from over 45 m / 150 ft). This is the most famous site on the island and, on a good day, one of the best dives in all of Costa Rica — a vast maze of towering rock pinnacles, peaks, valleys, channels, and swim-throughs draped in soft corals and gorgonian fans. You can do several completely different dives here. Moderate-to-strong currents bring in pelagic life, so it’s best for divers with around 20–30+ logged dives.
Scenery: Dramatic pinnacle topography, the best visibility on the island.
Fish & life: Swirling bait balls of jacks, giant snappers, groupers and amberjack, barracuda, reef sharks; the deeper section is where the scalloped hammerheads and, May–November, occasional bull sharks appear. The site is named for the giant manta rays (“devil rays”) that visit, best late December to early March.
What You’ll See — and When
Caño Island is reef-and-pelagic in one. On a typical day expect whitetip reef sharks, sea turtles (hawksbills and greens), huge schools of jacks and barracuda, parrotfish, angelfish, moray eels, pufferfish, and scorpionfish. If sea turtles capture your imagination, don’t miss our deep dive on the species, nesting, and how to help right here in Ojochal: Sea Turtle Conservation at Reserva Playa Tortuga.
The seasonal big-ticket sightings are what make timing matter:
- Manta rays: peak late December – early March (the dry season also brings the best visibility, 25–30 m).
- Scalloped hammerheads: possible at the deeper sites, shy and reward patience and calm conditions.
- Bull sharks: more likely May – November at the deeper spots.
- Whale sharks: rare but possible, with some sightings December–March — a true stroke of luck.
- Humpback whales: heard and sometimes seen from the boat in season — Marino Ballena National Park was created to protect them.
Best overall diving window: the dry season, roughly December–April, for the calmest seas and clearest water — though the green season brings its own big-animal action for those who don’t mind choppier crossings. (Wondering what to throw in your bag for a day on the boat? Our guide to what to do in Ojochal and the rest of our blog cover the seasons in detail.)
Where to Dive: Recommended Operators
Caño Island is a strictly protected reserve with capped daily diver numbers, so you must go with a licensed operator — and booking ahead in high season (December–April) is essential. Most dive-focused trips launch from Sierpe or Drake Bay (closest to the island), while snorkel-and-dive day trips also run from Uvita. A few well-established, reputable operators:
- Costa Rica Dive and Surf — Uvita-based, running day trips to Caño Island. costaricadiveandsurf.com
- Costa Rica Adventure Divers — Drake Bay, daily Caño Island dive tours for all levels. costaricaadventuredivers.com
- Mad About Diving — Drake Bay PADI dive center. madaboutdiving.com
We’re glad to help Vista Bendita guests choose and arrange a trip with a reserve-licensed operator that fits your experience level — just ask. Prefer to stay topside on the water? See our complete fishing guide and our roundup of surfing, SUP, kayaking & ocean activities.
A Note on Closer-to-Shore Diving
Honest expectation-setting: the mainland beaches right around Ojochal are better for surfing, beachcombing, and snorkeling the tide pools than for scuba — the diving worth gearing up for is at Caño Island. If you want reef time without a full dive trip, the snorkeling at Caño is world-class on its own, and the same operators run snorkel-only spots. For shoreline exploring, our guide to the best beaches near Ojochal has you covered.
The Best Dive in Costa Rica: Cocos Island (Isla del Coco)
No serious discussion of Costa Rican diving ends anywhere but here. Cocos Island is a remote, uninhabited, intensely protected speck of jungle-covered rock about 550 km (340 miles) off the Pacific coast — the only emergent peak of a submerged volcanic mountain range, a UNESCO World Heritage Site and national park. Jacques Cousteau called it one of the most beautiful islands in the world. Most divers who reach it call it the best dive of their lives.
Why it’s legendary: Cocos is the hammerhead capital of the planet. At famous sites like Bajo Alcyone and Dirty Rock, divers hang in the current and watch schools of dozens — sometimes hundreds — of scalloped hammerhead sharks cruise the cleaning stations overhead. And the hammerheads are only the headline: whale sharks, manta rays, eagle rays, silky sharks, tiger sharks, Galapagos sharks, marbled rays, huge schools of jacks and snapper, dolphins, sailfish, tuna, and wahoo all converge on these nutrient-rich waters. Around 20 dive sites ring the island, from shallow bays to sheer vertical walls.
Getting there is a commitment. This is the most important thing to understand: Cocos is reachable only by liveaboard. There are no facilities and no day trips. Boats depart from Puntarenas (about a 2-hour drive from San José) and the open-ocean crossing takes roughly 30–36 hours each way. Trips are typically 10 days all-in. Pack seasickness medication — the crossing can be rough.
It’s for advanced divers only. Strong currents, deep dives (often to ~30 m / 100 ft, frequently on nitrox), open-ocean conditions, and variable visibility make Cocos unsuitable for beginners or non-divers. Operators generally require a solid number of logged dives and advanced certification. The two best-known liveaboard operators are the Okeanos Aggressor (aggressor.com) and the Undersea Hunter Group (underseahunter.com); berths book up many months in advance.
When to go:
- Dry season (December–May): calmer seas, smoother crossings, good visibility; brings silky sharks, dolphins, and mobulas. Best for less weather-hardened divers.
- Rainy season (June–November): rougher crossings and more rain, but the nutrient-rich water draws the largest numbers of hammerheads, whale sharks, and mantas. For peak big-animal action, this is the time — May through August is often cited as the sweet spot.
It’s not cheap, it’s not easy, and it’s not for everyone — but if you’re a serious diver, a Cocos Island liveaboard is the apex trip of a diving career. Many guests fly into Costa Rica via San José and pair it with a recovery stay on the coast; if Cocos is on your bucket list, building a few decompression days at Vista Bendita before or after the voyage is a beautiful way to bookend the adventure. While you’re unwinding back on land, the stargazing here under some of the darkest skies in the Americas is the perfect counterpoint to a week underwater.
Practical Tips for Diving Near Ojochal
- Book Caño Island day trips ahead in high season — diver numbers are capped by the reserve and permits sell out (Dec–April especially).
- Match the site to your experience and tell your operator your logged-dive count honestly — Coral Garden and Shark Cave for newer divers, Bajo del Diablo for the experienced.
- Use reef-safe sunscreen and take nothing from the reserve.
- Bring seasickness medication for the boat ride out — take it an hour before departure.
- Not certified? Some operators offer a pool-training intro the day before; otherwise the snorkeling at Caño is superb.
- Plan Cocos far in advance — liveaboard berths book up many months ahead.
Dive Site Reference & Coordinates
For planning, here are the key locations. (Caño Island individual-site coordinates are approximate and clustered tightly around the island; use the island coordinate to navigate, and your dive operator for precise GPS.)
- Caño Island (Isla del Caño) — approx. 8.7195° N, 83.8836° W — Open in Google Maps
- Bajo del Diablo / Devil’s Pinnacle — on the western platform, ~2.5 km off the island’s western point (cluster near the island coordinate above)
- Cueva del Tiburón (Shark Cave) — closest site to the island, near the island coordinate
- Uvita boat departure (Playa Uvita / Marino Ballena) — approx. 9.1456° N, 83.7370° W — Open in Google Maps
- Sierpe (common dive-boat launch) — approx. 8.8569° N, 83.4719° W — Open in Google Maps
- Cocos Island (Isla del Coco) — approx. 5.5236° N, 87.0581° W — Open in Google Maps (note: ~550 km offshore; liveaboard access only)
From a relaxed coral garden full of parrotfish to a wall of hammerheads in the open blue, Costa Rica’s Pacific offers some of the most exhilarating diving on the planet — and the gateway is right here. Gear up: the reef sharks of Caño are waiting just over the horizon, and somewhere far beyond, the hammerheads of Cocos are circling.
Diving Caño on your stay, or dreaming of Cocos? Tell us about it in the comments — and if you’d like help arranging a day trip with a reputable, reserve-licensed operator, just reach out.
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After a day exploring waterfalls, beaches, whale watching tours, restaurants, and rainforest adventures, relax in the peaceful mountain setting of Vista Bendita overlooking Costa Rica’s South Pacific coast.
Enjoy ocean views, tropical wildlife, a private pool, and easy access to some of the region’s best experiences near Ojochal and Uvita.
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