Beach
Three Mile Beach
Westland District, New Zealand · sea 17.6 °C at its warmest, in February

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
beach near Ōkārito, New Zealand
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 Three Mile Beach?
The sea off Three Mile Beach averages 17.6 °C at its warmest, in February, and 12.5 °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 Three Mile Beach?
The sea here never averages 20 °C in any month, so swimming means cold water all year. Some people do it anyway.
Where is Three Mile Beach?
Three Mile Beach is on the coast of Westland District, New Zealand, at -43.2500, 170.1180. The map on this site flies straight to it.
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