Beach
Shelly Beach
New South Wales, Australia · sea 23.3 °C at its warmest, in February

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020.
About
Shelly Beach (also known as Shelley Beach) is a beach located in Manly, a suburb of Sydney, New South Wales, Australia. It is adjacent to North Head and Fairy Bower.
Questions
How warm is the sea at Shelly Beach?
The sea off Shelly Beach averages 23.3 °C at its warmest, in February, and 18.1 °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 Shelly Beach?
The sea reaches 20 °C or more from November to May. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Shelly Beach?
Shelly Beach is on the coast of New South Wales, Australia, at -33.8005, 151.2980. The map on this site flies straight to it.