Water temperature in Sydney (NSW)

This data the coastal Sydney ocean water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current ocean temperature in Sydney

Water temperature in Sydney today is 20.7°C. Based on our historical data over a period of ten years, the warmest water in this day in the Tasman Sea near Sydney was recorded in 2013 and was 21.7°C, and the coldest was recorded in 2008 at 16.4°C. Sea water temperature in Sydney is expected to drop to 19.1°C in the next 10 days. September average water temperature in Sydney is 19.1°C, the minimum temperature is 15.8°C, and the maximum is 22.2°C.

The swimming season in Sydney lasts from January to December, twelve months per year! During those months, Sydney water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Sydney in winter reaches 19.6°C, in spring 20.1°C, in summer the average temperature rises to 23.8°C, and in autumn it is 23.3°C.

Sydney water temperature now

The ocean salinity in Sydney is 35.54‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Sydney for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Sydney. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Sydney. Data in table shown for 10 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Sydney

Sydney weather forecast

Current temperature and weather

Data in a table show Sydney temperature today (10 September 2025). For more information and forecast for a few days, go to the weather forecast Sydney.

0-3 h	3-6 h	6-9 h	9-12 h
17.2°C	16.6°C	15.4°C	16°C

12-15 h	15-18 h	18-21 h	21-24 h
16.3°C	16.5°C	15.9°C	15.8°C

Sydney water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Sydney. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Sydney on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Sydney

The nearest beaches and cities from Sydney with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Dover Heights	18.5°C	16°C		2.01 m
Manly	18.5°C	17°C		2.01 m
Dee Why	18.4°C	17°C		1.72 m
Narrabeen	18.4°C	17°C		1.44 m
Collaroy	18.4°C	17°C		1.44 m
Bensville	18.4°C	16°C		1.2 m
Newport	18.4°C	17°C		1.44 m
Mona Vale	18.4°C	17°C		1.44 m
Warriewood	18.4°C	17°C		1.44 m
Mosman	18.3°C	16°C		1.49 m

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Sydney Harbour

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Our report for Sydney is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.