Kosrae is a remote Pacific island in the Federated States of Micronesia, surrounded by a barrier reef that produces walls, drop-offs, reef flats, and wreck sites within a single compact area. Water temperature stays warm year-round, nudging slightly higher from mid-year through autumn. Visibility is frequently very high, particularly at wall and reef sites, which makes reading the topography straightforward even for less experienced divers. Sites range from shallow coral gardens and an old clam farm accessible to beginners, through to deeper walls and drift dives at places such as Shark Island and Walung Drop Off that suit intermediate divers. Resident species include whitetip reef sharks, silvertip sharks, Napoleon wrasse, green sea turtles, dogtooth tuna, and giant morays, while the Lelu Wrecks add a historical dimension to the diving.





Monthly water temperature across Kosrae's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperature varies only slightly across the year, remaining warm throughout and rising by a degree or so from mid-year through to late autumn. Trade winds dominate from November to June, but the south and west sides of the island retain sheltered, diveable conditions during that period. Diving is not typically offered on Sundays, as the local community observes that day for church.
6 operators
Lelu, Micronesia
Micronesia
Lelu, Micronesia
Micronesia
Micronesia
Water around Kosrae stays near 30°C all year, based on satellite sea-temperature data for its dive sites.
With water around 29–30°C, a rash guard or 3mm shorty works in Kosrae year-round.
Fin maps 6 sites in Kosrae (6 scuba diving sites and 1 snorkelling spots, with some suited to both).
4 more sites to explore