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Average water temperature in Sydney

On this page you find the mean water temperature over the year in Sydney (New South Wales), Australia. Get insights into the water temperature fluctuations and discover what they mean for visitors.


In Sydney, the water undergoes seasonal changes. The warmest month is January, with an average water temperature of 21°C.

The coldest water temperature month, August, has an average temperature of 16°C. It may not be the ideal time for a swim.


Forecast for Sydney

Fri   Dec 27
35°C | 21°C
NW 10 m/s
1.5 mm
broken clouds and rain

broken clouds and rain

Sat   Dec 28
25°C | 20°C
E 8 m/s
1.3 mm
partly cloudy and  chance of rain

partly cloudy and chance of rain

Sun   Dec 29
26°C | 18°C
SE 9 m/s
almost clear and no rain

almost clear and no rain

Interested in more climate information?

This site provides you with all the information you need about the climate in Sydney.

Our site offers climate and forecast data for every country in the world. Are you going to Australia? On this website you can find historical weather averages for many cities in Australia. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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