Beach
The Basin
Rottnest Island Authority, Australia · sea 22.3 °C at its warmest, in February

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 15 km offshore, at the nearest open water cell of a 0.25° grid.
About
The Basin is a popular ocean swimming location at the northeast of Rottnest Island, between Pinky Beach and Longreach Bay in Western Australia. John T.
Questions
How warm is the sea at The Basin?
The sea off The Basin averages 22.3 °C at its warmest, in February, and 18.7 °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 The Basin?
The sea reaches 20 °C or more from December to June. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is The Basin?
The Basin is on the coast of Rottnest Island Authority, Australia, at -31.9886, 115.5359. The map on this site flies straight to it.
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