Kyushu faces three water bodies, the Sea of Japan, the East China Sea, and the Pacific Ocean, and the seven sites in our database cover a wide range of dive types: reefs, wrecks, caves, drop-offs, drift dives, and muck at sites including the Goto Islands, Kujyukushima Islands, and Iki Island. Water temperatures sit in the mid-to-upper teens Celsius through winter and reach the mid-twenties in summer, making the warmer months the most comfortable season. Recorded species include nudibranchs, sea kraits, seamoths, snake eels, dogtooth tuna, and zebra bullhead sharks.
Monthly water temperature across Kyushu's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Temperatures range from the mid-teens in winter to the mid-to-upper twenties by late summer, with the warmest window running from July through October. Divers targeting wrecks at the Goto Islands or reef walls at sites like Ooshima Point will find conditions most forgiving in the summer months.
11 operators
Hondo, Japan
Ushibuka, Japan
Isahaya, Japan
Water temperature around Kyushu ranges from about 16°C in February to 26°C in August, based on satellite sea-temperature data for its dive sites.
In the warm season (about 26°C) a 3mm full suit is comfortable in Kyushu; in the coldest months (about 16°C) step up to a 7mm or semi-dry suit.
Fin maps 7 sites in Kyushu (7 scuba diving sites and 2 snorkelling spots, with some suited to both).
3 more sites to explore
