Serving Tamarindo, Playa Flamingo, Potrero, and Playas del Coco.

Under The Sea Diving
PADI Dive Center
Two scuba divers exploring a rocky reef with bubbles rising toward the sunlit surface off the Guanacaste coast, Costa Rica
PADI 5★ Dive Center · Playa Potrero, Costa Rica

Explore the Pacific's Best Dive Sites

The Best Scuba Diving in Costa Rica

Experience the best scuba diving in Guanacaste Costa Rica, with Under The Sea Diving. From your first breath underwater to bull sharks at the Bat Islands and manta rays at the Catalinas, our multilingual PADI instructors make every dive safe, relaxed, and unforgettable.

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Diving in Guanacaste, Costa Rica

Scuba Diving Tours, Courses & Conservation in Guanacaste

Experience the best scuba diving in Costa Rica with Under The Sea Diving, your PADI dive center in Playa Potrero. From your first breath underwater to advanced technical certifications, we offer the full range of diving in Guanacaste — guided scuba tours to the Catalina and Bat Islands, PADI courses from Open Water to Divemaster, hands-on marine conservation dives, and technical specialties for every level. Whether it's your first dive or your five-hundredth, the Pacific's vibrant underwater world starts here.

Scuba diver silhouetted against sunlight while descending in deep blue water off Playa Potrero, Costa Rica Scuba Diving Tours Explore Guanacaste's world-class dive sites at the Catalina and Bat Islands, where manta rays, sea turtles, schooling fish, and bull sharks fill the nutrient-rich Pacific waters. From Discover Scuba first-timers to certified fun dives, shark dives, and night dives, our local guides handle every detail so you can focus on the thrill. Group of smiling scuba students in dive gear aboard the boat before a course dive in Guanacaste, Costa Rica PADI Dive Courses Get certified in the clear waters of Guanacaste, from your first Discover Scuba experience to PADI Open Water, Advanced, Rescue, and Master Scuba Diver. Learn at your own pace with e-learning and hands-on dives at the Catalina Islands, guided by professional PADI instructors dedicated to your safety. Scuba diver removing tangled ghost fishing line during a marine conservation dive in Guanacaste, Costa Rica Marine Conservation Diving Turn your passion for diving into a force for good with hands-on programs — Shark Conservation, AWARE Coral Reef, Dive Against Debris, and Underwater Naturalist specialties. Help protect Guanacaste's Pacific ecosystems and the sharks, manta rays, and coral reefs that call these waters home. Technical diver gliding over a coral reef with a diver propulsion vehicle (DPV) in Guanacaste, Costa Rica Technical Scuba Diving Go beyond recreational limits with technical training built for Guanacaste's volcanic pinnacles, arches, and deep sites at the Bat and Catalina Islands. Master Nitrox, Deep, Sidemount, Wreck, and DPV specialties to safely explore the depths where bull sharks, giant manta rays, and big pelagics roam.

Explore Costa Rica's Pacific Dive Sites

From the Catalina Islands to the legendary Bat Islands, the waters off Guanacaste hold some of Costa Rica's most thrilling dives — manta rays, bull sharks, and big-animal encounters in the warm Pacific. Here's where we'll take you.

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Dive the Guanacaste Highlights

Diver with a manta ray at the Catalina Islands, Guanacaste, Costa Rica Catalina Islands Manta rays, mobulas, and schooling fish over volcanic pinnacles — the Catalinas are Guanacaste's go-to for graceful big-animal encounters. Bull shark diving at the Bat Islands in Guanacaste, Costa Rica Bat Islands (Islas Murciélago) The legendary home of the bull sharks. An advanced, adrenaline-charged dive at one of Costa Rica's most famous sites.
From the Dive Log

The Dive Report

Local dive conditions, marine life spotlights, and tips from the crew — your guide to scuba diving in Guanacaste, straight from the water.

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Trusted by Divers Worldwide

What Our Clients Say About Dive Tours in Costa Rica

Divers from around the world trust Under The Sea Diving for safe, unforgettable diving in Guanacaste — here's what they have to say.

Find Us on KAYAK

Under The Sea Diving is featured in KAYAK's travel guide for Playa Potrero. Planning your Guanacaste trip? Check out their guide for flights, stays, and things to do — then come dive with us.

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Ready for the Best Scuba Diving in Costa Rica?

From thrilling dive tours to professional PADI certification, our team is ready to help you plan the perfect adventure in Guanacaste — whether it's your first dive or your five-hundredth.

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