December is a popular month to ask about Cottesloe Beach because conditions can shift week to week along this coast. Expect the water near 22.0°C, with daily variation from wind, tides and recent storms. We refresh the live value from Open-Meteo Marine every hour, so the headline above always reflects the current state of the Indian Ocean.
Cottesloe Beach sea temperature in December — averages 22.0°C
The sea at Cottesloe Beach in Australia averages 22.0°C during December, based on long-run climatology for the Indian Ocean. Use the live reading below for today's actual water and the monthly grid to compare with the rest of the year.
Average sea · December
22.0°C
warm · Excellent
Live water now
…
Recommended wetsuit
Rash vest or swimsuit
At 22.0°C most swimmers and surfers are comfortable in a swimsuit or thin rash top.
Monthly comparison
Yes — comfortable for most swimmers · Cottesloe Beach
Can you swim at Cottesloe Beach in June? — 19.0°C water19.0°CCan you swim at Cottesloe Beach in July? — 18.0°C water18.0°CCan you swim at Cottesloe Beach in August? — 18.0°C water18.0°CCan you swim at Cottesloe Beach in September? — 19.0°C water19.0°CCan you swim at Cottesloe Beach in October? — 20.0°C water20.0°CCan you swim at Cottesloe Beach in November? — 21.0°C water21.0°C
Frequently asked questions
What is the average sea temperature at Cottesloe Beach in December?
Cottesloe Beach averages 22.0°C in December, based on long-run climatology for the Indian Ocean.
Is the sea warm enough to swim at Cottesloe Beach in December?
Yes, most swimmers find 22.0°C comfortable for unrestricted swimming.
Do I need a wetsuit at Cottesloe Beach in December?
Most swimmers don't need a wetsuit; a rash vest helps for longer sessions.