Beach
Daecheon Beach
Daecheon-dong, South Korea · sea 24.9 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 14 km offshore, at the nearest open water cell of a 0.25° grid.
About
Daecheon Beach is a beach in Boryeong, South Korea. It is the biggest of South Korea's western beaches and stretches 3.5 km. It's the location of the Boryeong Mud Festival.
Questions
How warm is the sea at Daecheon Beach?
The sea off Daecheon Beach averages 24.9 °C at its warmest, in August, and 5.3 °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 Daecheon Beach?
The sea reaches 20 °C or more from July to September. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Daecheon Beach?
Daecheon Beach is on the coast of Daecheon-dong, South Korea, at 36.3127, 126.5097. The map on this site flies straight to it.