Water temperature in Mosman

This data the coastal Mosman 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 Mosman

Water temperature in Mosman today is 17.9°C. Based on our historical data over a period of ten years, the warmest water in this day in the Tasman Sea near Mosman was recorded in 2015 and was 18.7°C, and the coldest was recorded in 2018 at 15.6°C. Sea water temperature in Mosman is expected to drop to 17.7°C in the next 10 days. September average water temperature in Mosman is 17.8°C, the minimum temperature is 15.6°C, and the maximum is 20.3°C.

The swimming season in Mosman lasts from November to June. During those months, Mosman water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Mosman in winter reaches 18.2°C, in spring 19°C, in summer the average temperature rises to 22.5°C, and in autumn it is 22.1°C.

Mosman water temperature now

The ocean salinity in Mosman is 35.30‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Mosman 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 Mosman. 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 Mosman. Data in table shown for 5 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Mosman

Mosman weather forecast

Current temperature and weather

Data in a table show Mosman temperature today (5 September 2025). For more information and forecast for a few days, go to the weather forecast Mosman.

0-3 h	3-6 h	6-9 h	9-12 h
14.8°C	13.5°C	12.9°C	15.8°C

12-15 h	15-18 h	18-21 h	21-24 h
16.3°C	15.6°C	14.4°C	14.7°C

Mosman water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Mosman. 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 Mosman 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 Mosman

The nearest beaches and cities from Mosman 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
Cremorne	17.9°C	16°C		1.06 m
Darling Point	17.9°C	16°C		1.06 m
Point Piper	17.9°C	16°C		1.06 m
Bondi Beach	17.9°C	16°C		1.06 m
Bronte	17.9°C	16°C		1.06 m
Clovelly	17.9°C	16°C		1.06 m
Crows Nest	17.7°C	16°C		1.06 m
Dover Heights	18.1°C	16°C		1.42 m
Greenwich	17.7°C	16°C		1.06 m
Kirribilli	17.7°C	16°C		1.06 m

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Our report for Mosman 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.