Two Boats and a Lagoon
Located in the tranquil lagoon at Jules Undersea Lodge in Key Largo, we offer intimate, personalized dive trips for small groups in a truly unique setting.
Best Scuba Diving in the Florida Keys
Come dive at Ocean First's newest location in Key Largo, Florida—widely recognized as the diving capital of the United States. Surrounded by the vibrant tropical waters of the Florida Keys, Key Largo offers diverse marine environments, including mangroves, seagrass beds, and world-class coral reefs. Backed by 20 years of leadership in the scuba industry, Ocean First offers exceptional underwater experiences for divers of all skill levels—from beginner scuba classes and advanced training to citizen science research opportunities. Complete your adventure with our convenient Dive & Stay packages, combining comfortable accommodations with world-class diving for a seamless Key Largo getaway.
SSI Scuba Certification Courses
At Ocean First, we offer comprehensive scuba dive training in a fun, safe, and comfortable environment — fostering lifelong divers and committed ocean stewards.
Key Largo Reef & Wreck Dive Charters
Explore Key Largo’s iconic reefs and wrecks with Ocean First’s small-group dive charters, offering safe, personalized adventures for divers and snorkelers of all experience levels.
Professional Development Training Center
Train for your dive career at Ocean First's Professional Development Training Center in Key Largo, located in one of the world's premier diving destinations. Become an SSI Dive Professional through hands-on training that builds advanced skills, confidence, and ocean knowledge. At Ocean First, you can start as a Dive Guide, progress to Open Water Instructor, or cross over from another agency with expert support. Our flexible, year-round courses are designed for divers pursuing career advancement or personal growth at their own pace. Turn your passion into a profession with Ocean First in Key Largo.
This is a great shop to dive with if you’re in Key Largo. They have smaller boats than most and will take you to some hidden gem dive sites. Looking forward to diving with them again. Hopefully this November for my wife’s birthday.
- DL Canuck (June 2026)
Awesome dive shop! Great staff!
- Ninna (May 2026)
We had a wonderful day of diving with Ocean First Key Largo. They were incredibly friendly and the boat was first rate. We loved that Alisia was in the water with us---it's always nice to have a guide to follow. We had a great day of visibility. Water was a little chilly, but it's still March and to be expected. We HIGHLY recommend Ocean First in Key Largo!!! Top Notch Operation!
- Chelly (April 2026)
Absolutely stellar experience! The entire team was professional yet friendly. Al is an amazing guide and made sure everyone felt safe and supported. 10/10 would dive with Ocean First again!
- Matt N. (June 2025)
Jardin and his crew were incredible. Alisia was the most passionate and enthusiastic dive guide we've ever had — she made our 100th dive unforgettable.
- Robert S. (June 2025)
We had a wonderful experience! The crew took us to six incredible reef and wreck dives while we completed AOW training. We'll definitely return on our next Key Largo trip!
- Kristin K. (June 2025)
Citizen Science at the OFI Research Station
As part of our partnership with MarineLab, the Ocean First Institute (OFI) has established a state-of-the-art research facility adjacent to our Key Largo dive shop. This facility supports groundbreaking conservation research focused on endangered species and impacted marine habitats.
Through hands-on student programs and science-based conservation projects, OFI works to train the next generation of conservation-minded scientists and ensure a sustainable future for our oceans.
TIDES is an immersive science camp for 12–18 year-olds, offering a transformational journey into marine science and ocean conservation. Learn more
Explore the world’s oceans with Ocean First. Whether you're seeking tropical reefs, land excursions, or custom dive adventures, we offer full-service travel planning and expert scuba training in paradise.
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