Beach
Ishizu Beach
Yaizu, Japan · sea 26.5 °C at its warmest, in August

Sea temperature month by month
16.1Jan
15.2Feb
15.5Mar
16.9Apr
19.1May
21.6Jun
24.4Jul
26.5Aug
25.7Sep
23.3Oct
20.9Nov
18.3Dec
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020.
About
coastal region on Suruga Bay in Japan
Wikipedia has no article about this beach yet. It is on the atlas from its Wikidata record and its photograph.
Questions
How warm is the sea at Ishizu Beach?
The sea off Ishizu Beach averages 26.5 °C at its warmest, in August, and 15.2 °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 Ishizu Beach?
The sea reaches 20 °C or more from June to November. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Ishizu Beach?
Ishizu Beach is on the coast of Yaizu, Japan, at 34.8425, 138.3354. The map on this site flies straight to it.