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Experience the best scuba diving in Costa Rica with Under The Sea Diving, your premier dive center to the vibrant underwater world of Guanacaste. Our mission is to ignite the spirit of exploration and awe beneath the waves, offering a gateway to a world of personalized underwater experiences. We also aim to provide a safe, unforgettable diving experience while promoting marine conservation and showcasing the stunning ocean life of this region. Guanacaste scuba diving offers an incredible variety of sites, from volcanic rock formations to expansive coral reefs teeming with marine life, including manta rays, bull sharks, reef sharks, whale sharks, and sea turtles. Our professional team is dedicated to giving you an unparalleled adventure with the highest level of service, whether you're a first-time diver or an experienced enthusiast looking to explore the hidden gems of the Pacific.
ABOUT USDive into the heart of marine conservation with Under The Sea Diving. We offer the best scuba diving in Costa Rica's Guanacaste region, with a mission to actively protect the vibrant ocean life we explore. Our expert guides, deeply knowledgeable about the local marine ecosystem, lead unforgettable conservation focused scuba diving tours that are as educational as they are exhilarating. We believe every dive is an opportunity to contribute to a healthier ocean.
CONSERVATION
Ready for an adventure? Our tours with Under The Sea Diving offer a thrilling gateway to Costa Rica's hidden marine world. Guided by local experts, you'll explore some of the Pacific's most renowned dive sites through our Diving Guanacaste Excursions. Known for its warm waters and diverse ecosystems, Guanacaste diving offers something for every skill level. From beginner-friendly reefs to challenging volcanic pinnacles, we provide a safe and exciting experience for all. Want to discover the Pacific's secrets? Explore our scuba diving in Costa Rica tours today.
TOURS
Ready to take your passion to the next level? Our professional PADI scuba diving courses in Costa Rica will teach you to dive in the warm, clear waters of Guanacaste. Whether you're seeking your first certification or ready to advance your skills, our expert instructors are here to guide you with hands-on experience at some of the Pacific's best dive sites. Our courses provide the knowledge and confidence you need to explore the ocean safely. Ready to take the plunge? Dive into our PADI scuba diving certification courses today.
COURSESTake your diving to the next level with our PADI technical scuba diving courses. Our expert instructors offer advanced certifications in Scuba Diving Costa Rica, preparing you to safely explore more challenging underwater environments. Master specialties like Nitrox and Deep Dive, or learn to dive with enriched air Nitrox with our PADI EANx diving course. Guanacaste is the perfect place to expand your skills and become a more capable and confident diver. Ready for a new challenge? Browse our technical diving certifications in Costa Rica today.
TECHNICALWhether you're a seasoned diver or just curious about what lies beneath the waves, The Dive Report is your comprehensive guide to the underwater world of Guanacaste, Costa Rica. Our blog covers everything from the best local dive sites and what to expect on your first tour, to detailed breakdowns of the marine life you'll encounter and tips for new divers. We share our passion and knowledge to help you get the most out of your experience and find out for yourself why we call these waters home.
FULL DIVE LOG
Published on: 04.06.2026
NEWS & UPDATES June is here, and the ocean keeps surprising us! Thanks to our amazing community for diving with us, supporting the crew, and continuing to create unforgettable underwater memories. Our creature of the month is the nudibranch, tiny, colorful, and endlessly cool. These sea slugs come in an incredible range of shapes and […]
Published on: 19.05.2026
Best Time To Dive Costa Rica | A Local’s Month-by-Month Guide After running dives out of Playa Potrero almost every day for the past two years, the question I get more than any other is some version of “when should I come?” It’s a fair question, and the honest answer is that there isn’t one […]
Published on: 07.05.2026
Celebrating 2 Years of Diving in Guanacaste | May News & Updates May is here, and the ocean keeps surprising us! Thank you to our amazing community for diving with us, supporting the crew, and continuing to create unforgettable underwater memories. Our creature of the month is the Seahorse—one of the ocean’s most unique and […]
Ready to turn your underwater dreams into a reality? We believe every dive should be an unforgettable experience. From thrilling scuba diving tours to professional certification courses, we offer the best diving in Guanacaste, Costa Rica. Our team of experts is ready to help you plan your perfect adventure, whether you're a beginner or an experienced diver. Want to take the plunge? Contact us today to plan your adventure.
CONTACT US!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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