Beach
Eastern Beach
Auckland Region, New Zealand · sea 21.1 °C at its warmest, in February

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 27 km offshore, at the nearest open water cell of a 0.25° grid.
About
beach in Auckland, 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 Eastern Beach?
The sea off Eastern Beach averages 21.1 °C at its warmest, in February, and 13.8 °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 Eastern Beach?
The sea reaches 20 °C or more from January to March. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Eastern Beach?
Eastern Beach is on the coast of Auckland Region, New Zealand, at -36.8682, 174.9102. The map on this site flies straight to it.