Beach
Four Mile Beach
Queensland, Australia · sea 29.1 °C at its warmest, in February

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 20 km offshore, at the nearest open water cell of a 0.25° grid.
About
beach in Port Douglas, Australia
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 Four Mile Beach?
The sea off Four Mile Beach averages 29.1 °C at its warmest, in February, and 23.4 °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 Four Mile Beach?
The sea reaches 20 °C or more from All year. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Four Mile Beach?
Four Mile Beach is on the coast of Queensland, Australia, at -16.5198, 145.4735. The map on this site flies straight to it.