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
Okinoshima Kaisuiyokujo sits at Tateyama, on the tip of the Boso Peninsula in Chiba Prefecture, Japan, an area known for its beaches and rocky coves along Tokyo Bay's outer edge. It is considered a beginner site.
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.
Thread-sail FilefishStephanolepis cirrhiferReported here · unconfirmed- Horn DragonetCallionymus curvicornisReported here · unconfirmed
Encrusting Horn CoralHydnophora exesaReported here · unconfirmed
Loggerhead Sea TurtleCaretta carettaReported 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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