Ogasawara lies far out in the Pacific Ocean, reachable only by a long ferry journey from Tokyo, and that isolation shapes both the effort required and the diving on offer. The four sites in our database, a wreck, two reefs, and a deep wall-and-drift site, cover a wide skill range, from the beginner-accessible wreck at Barachin to the advanced deep wall at Sohugan, which reaches fifty metres and carries strong currents throughout. All diving is by boat only. Recorded species include silvertip sharks, whitetip reef sharks, Napoleon wrasse, green sea turtles, bottlenose dolphins, dogtooth tuna, emperor angelfish, and peacock mantis shrimp.
Monthly water temperature across Ogasawara's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperatures stay above twenty degrees Celsius year-round, warming to the upper twenties from late summer through autumn. The warmest and calmest conditions for reaching the islands typically fall between summer and early autumn, which also aligns with the peak activity window noted in the research.
1 operator
Water temperature around Ogasawara ranges from about 21°C in February to 28°C in August, based on satellite sea-temperature data for its dive sites.
In the warm season (about 28°C) a rash guard or 3mm shorty is comfortable in Ogasawara; in the coldest months (about 21°C) step up to a 5mm suit.
Fin maps 4 sites in Ogasawara (3 scuba diving sites).
1 more site to explore
