Water temperature in Fremantle

This data the coastal Fremantle 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 Fremantle

Water temperature in Fremantle today is 18.6°C. Based on our historical data over a period of ten years, the warmest water in this day in the Indian Ocean near Fremantle was recorded in 2014 and was 18.8°C, and the coldest was recorded in 2016 at 16.5°C. Sea water temperature in Fremantle is expected to drop to 18°C in the next 10 days. September average water temperature in Fremantle is 17.6°C, the minimum temperature is 15.8°C, and the maximum is 19.2°C.

The swimming season in Fremantle lasts from November to May. During those months, Fremantle water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Fremantle in winter reaches 18.5°C, in spring 18.7°C, in summer the average temperature rises to 22.6°C, and in autumn it is 21.6°C.

Fremantle water temperature now

The ocean salinity in Fremantle is 35.24‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Fremantle 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 Fremantle. 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 Fremantle. Data in table shown for 26 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Fremantle

Fremantle weather forecast

Current temperature and weather

Data in a table show Fremantle temperature today (26 September 2025). For more information and forecast for a few days, go to the weather forecast Fremantle.

0-3 h	3-6 h	6-9 h	9-12 h
16.4°C	16.2°C	14.2°C	16°C

12-15 h	15-18 h	18-21 h	21-24 h
17.5°C	17.3°C	16.3°C	15.1°C

Fremantle water temperature by month

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

The nearest beaches and cities from Fremantle 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
North Fremantle	18.4°C	17°C		0.96 m
Coogee	18.7°C	17°C		1.3 m
Leighton Beach	18.7°C	17°C		1.17 m
Cottesloe	18.4°C	17°C		0.96 m
Mosman Park	18.4°C	17°C		0.96 m
Peppermint Grove	18.4°C	17°C		0.96 m
Attadale	18.1°C	18°C		0.96 m
Dalkeith	18.1°C	18°C		0.96 m
Swanbourne	18.7°C	17°C		1.27 m
Garden Island	19°C	17°C		1.32 m

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South Fremantle

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Our report for Fremantle 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.