IOP and East Izu covers the eastern shore of the Izu Peninsula along Sagami Bay, with five sites ranging from the well-known Izu Oceanic Park to the wreck and reef at Shobusawa Beach. Entry is by shore or boat depending on the site, and the skill range spans beginner to advanced. Izu Oceanic Park itself is built on lava-flow topography and features kelp forests, natural reef, and artificial structures, with a concrete ramp and handrails to assist entry. Visibility averages around fourteen metres annually but improves considerably in winter, when clarity is at its best. Water temperatures sit in the upper teens through winter and reach the upper twenties in late summer.
Monthly water temperature across IOP & East Izu's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Winter offers the best visibility on the east coast, with clarity improving significantly from the murkier summer months when plankton is abundant. Temperatures drop into the upper teens from winter through early spring, requiring appropriate thermal protection, particularly for longer dives at sites like Izu Oceanic Park.
1 operator
Water temperature around IOP & East Izu ranges from about 17°C in February to 26°C in September, based on satellite sea-temperature data for its dive sites.
In the warm season (about 26°C) a 3mm full suit is comfortable in IOP & East Izu; in the coldest months (about 17°C) step up to a 7mm or semi-dry suit.
Fin maps 5 sites in IOP & East Izu (3 scuba diving sites and 1 snorkelling spots).
1 more site to explore
