Beach
Haeundae Beach
Haeundae District, South Korea · sea 26.1 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020.
About
Haeundae Beach (Korean: 해운대해수욕장) is an urban beach in Busan, South Korea, located in the eponymous Haeundae District.
Questions
How warm is the sea at Haeundae Beach?
The sea off Haeundae Beach averages 26.1 °C at its warmest, in August, and 13.7 °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 Haeundae Beach?
The sea reaches 20 °C or more from June to October. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Haeundae Beach?
Haeundae Beach is on the coast of Haeundae District, South Korea, at 35.1585, 129.1605. The map on this site flies straight to it.