Flat Cay
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
Flat Cay is a small islet off the southwestern coast of St. Thomas in the U.S. Virgin Islands, sitting in the Caribbean Sea near the approach to Charlotte Amalie harbor. Dive and snorkel trips to the cay are typically run out of nearby St. Thomas marinas. The reef here reaches a maximum depth of around 15.2 metres and is rated a beginner dive.
AI overviewMarine life here
Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.
Mustard Hill CoralPorites astreoidesReported here · unconfirmed
Massive Starlet CoralSiderastrea sidereaReported here · unconfirmed
Finger CoralPorites poritesReported here · unconfirmed
Boulder star coralOrbicella franksiReported here · unconfirmed
Lobed Star CoralOrbicella annularisReported here · unconfirmed
Greater Star CoralMontastraea cavernosaReported here · unconfirmed
Durable 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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