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
Onnason beach lies on Okinawa's main island in Japan, in Onna Village along the East China Sea coast, an area known for shallow shore diving and snorkeling access over a reef bottom. The site has a maximum depth of around 3 metres and is considered a beginner dive. Divers have also reported strong currents here at times, so it is worth checking conditions before entering the water even given the shallow depth.
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.
Zebra LionfishDendrochirus zebraReported here · unconfirmed
Tawny Hermit CrabCoenobita rugosusReported here · unconfirmed- Ophiopteron elegansReported here · unconfirmed
Dark Red-spined Brittle StarOphiothrix (Acanthophiothrix) purpureaReported 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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