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Middle Keys
Florida, United States2 dive sites
About This Area
The Middle Keys, spanning from Duck Key to the Seven Mile Bridge, offer a mix of reef and wreck diving with fewer crowds than the Upper Keys. Marathon serves as the main hub for dive operations accessing sites like Sombrero Reef and the Thunderbolt wreck.
Features
- •Famous Sombrero Reef lighthouse and marine sanctuary
- •Thunderbolt wreck - 188-foot cable layer intentionally sunk as artificial reef
- •Coffins Patch reef system with abundant marine life
- •Mix of shallow and deep dive sites for various experience levels
- •Patch reefs accessible to snorkelers and beginners
- •Visibility 40-80 feet depending on conditions
Diving Tips
- •Water temps 76-86°F year-round
- •Boat dives primarily from Marathon marinas
- •Summer for best visibility; winter brings occasional choppy seas
- •Rash guard sufficient; light wetsuit in winter
- •Less crowded than Upper Keys sites
- Check reef mooring conditions before planning trips
