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.
Dived here today? How were conditions vs. what we showed?
About this site
Nai Harn offers clear waters with visibility often exceeding 20 meters. The site features a mix of coral-covered boulders and sandy patches, home to reef fish, moray eels, and occasional leopard sharks. Gentle currents make it ideal for beginners, while deeper sections attract experienced divers. The sloping reef transitions to a sandy bottom at 18 meters, where garden eels sway in the current. Night dives reveal octopus and crustaceans. Calm conditions prevail from November to April, with warm water year-round. Nearby pinnacles host schools of barracuda and trevally.
Marine life here
Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.
Moorish IdolZanclus cornutusReported here · unconfirmed
Blue LinckiaLinckia laevigataReported here · unconfirmed
Moon WrasseThalassoma lunareReported here · unconfirmed
Mottled Lightfoot CrabGrapsus albolineatusReported here · unconfirmed
Indo-Pacific Sergeant MajorAbudefduf vaigiensisReported here · unconfirmed
Red-tailed ButterflyfishChaetodon collareReported here · unconfirmed
Checkerboard WrasseHalichoeres hortulanusReported 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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