Diving in the United States: 87 Sites From Springs to Open Ocean

The United States holds 87 published dive sites spanning a temperature range that would suit a drysuit diver in the Pacific Northwest and a rash-guard diver in the Florida Keys on the same calendar day. Water temps run 8–28°C depending on region and season, and the country dives year-round somewhere. Whether you want a freshwater cavern with 30 m visibility or a Gulf Coast jetty where barracuda hang in the current, there's a real dive here.

Best dive sites in the United States

• Dry Tortugas National Park – Intermediate-level open-water diving 113 km west of Key West. Visibility reaches 30 m around the coral-encrusted moat walls and offshore patch reefs. Green sea turtles are a reliable sighting.
• Ginnie Spring – A beginner-friendly Florida freshwater spring with a consistent 30 m viz and 22°C water regardless of season. The cavern entrance draws divers who aren't yet cave-certified; the flow is gentle enough to fin against comfortably.
• Rainbow Spring – Another beginner spring, 25 m visibility, with a wide boil and easy entry. Manatees pass through in cooler months.
• Ichetucknee Spring – 25 m viz, beginner-rated, fed by nine springs along a short river stretch. Snorkelers and divers share the water; arrive early on weekends.
• Jackson Blue Spring – One of the clearer beginner springs in the Florida Panhandle, 25 m viz, with a cavern zone that tempts but requires proper training to enter safely.
• Volusia Blue Spring – 20 m viz, beginner-friendly, and a designated manatee refuge November through March when the animals crowd the warm outflow.
• Weeki Wachee Spring – 15 m viz, beginner-rated, known for its mermaid shows above water and surprisingly good fish life below.
• John D MacArthur Beach State Park – Beginner site on Florida's southeast coast, 15 m viz, with reef structure close to shore and regular bottlenose dolphin activity offshore.
• Fort Pickens Jetties – 6 m viz, beginner-rated, but the rock structure holds sheepshead, flounder, and occasional great barracuda. Good for a first Gulf dive.
• Phil Foster Park Snorkel Reef – 10 m viz, beginner, an artificial reef in the Blue Heron Bridge area of Riviera Beach that punches well above its depth rating for macro life.

When is the best time to dive in the United States

The US dives year-round. Florida springs are consistent in any month—water temperature stays around 20–22°C and visibility doesn't change with the weather. Gulf and Atlantic sites are warmest June through September (up to 28°C) and clearest in late spring before summer plankton blooms. If you're targeting green sea turtles or dolphin encounters on the Atlantic side, May through October gives the longest daylight and calmest seas.

Is the United States good for beginners

Yes—the majority of listed sites are beginner-rated. Florida's freshwater springs are among the best first-dive environments anywhere: no current to fight, no salt to manage buoyancy against, and visibility that regularly hits 25–30 m. Open-water beginners should start there before moving to lower-visibility coastal sites like Fort Pickens Jetties.

What you'll see

Green sea turtles appear at reef and spring sites across Florida. Bottlenose dolphins are seen around coastal sites, particularly off John D MacArthur Beach. Great barracuda patrol jetties and artificial reefs along the Gulf and Atlantic coasts—they're curious but not aggressive.

FAQ

Do I need a special permit to dive Dry Tortugas? You need a park entry fee and must arrive by ferry or seaplane; there's no road access. Diving itself requires no additional permit, but anchoring has restrictions—check current NPS rules before booking a liveaboard.

Are the Florida springs cold? Spring water holds a steady 20–22°C year-round. In summer that feels refreshing; in winter it's warmer than the air. A 3 mm wetsuit is comfortable for most divers.

Can I dive the US without certification? Most sites require at least an Open Water certification. Several operators at spring sites and coastal parks offer discover-scuba experiences for uncertified divers under direct supervision.

What visibility should I realistically expect outside the springs? Coastal and ocean sites vary widely—Fort Pickens Jetties averages around 6 m, while Dry Tortugas can reach 30 m. Check recent dive logs on the site pages before travelling to a specific location.

United States dive map