Beach
Yonaha-Maehama
Miyakojima, Japan · sea 29.1 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 17 km offshore, at the nearest open water cell of a 0.25° grid.
About
Yonaha Maehama (与那覇前浜ビーチ, Miyakoan:Maipama) is a popular bathing beach on Miyakojima Island in Miyakojima City, Okinawa Prefecture in Japan.
Questions
How warm is the sea at Yonaha-Maehama?
The sea off Yonaha-Maehama averages 29.1 °C at its warmest, in August, and 22.7 °C at its coolest. These are monthly means from NOAA's OISST v2.1 satellite and buoy record for 1991 to 2020, sampled at the beach's own coordinates.
When can you swim at Yonaha-Maehama?
The sea reaches 20 °C or more from All year. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Yonaha-Maehama?
Yonaha-Maehama is on the coast of Miyakojima, Japan, at 24.7361, 125.2611. The map on this site flies straight to it.