Conditions & tides
Scored by DiveConnect's site-physics model
Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.
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About this site
Third Reef lies off the Florida coast near Marathon in the Florida Keys, part of the reef tract that runs parallel to the island chain in the Atlantic. This stretch of shallow water reef sits offshore of the Keys' Middle Keys section, accessible by short boat runs from local marinas. It is rated a beginner dive, making it a straightforward option for those looking to explore the reef tract without demanding conditions.
AI overviewDurable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.
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