Beach
Seventy-Five Mile Beach
Queensland, Australia · sea 26.9 °C at its warmest, in February

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 19 km offshore, at the nearest open water cell of a 0.25° grid.
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 Seventy-Five Mile Beach?
The sea off Seventy-Five Mile Beach averages 26.9 °C at its warmest, in February, and 21.5 °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 Seventy-Five 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 Seventy-Five Mile Beach?
Seventy-Five Mile Beach is on the coast of Queensland, Australia, at -25.3817, 153.1839. The map on this site flies straight to it.