Fremantle Sea Temperature

Looking to find out what the sea water temperature in Fremantle is for today and the next few days? Below are data and charts that will give you information about sea temperatures in Fremantle and nearby locations.

Water temperature in Fremantle right now

Below is the current sea temperature for Fremantle, Australia on 26th September 2023.

18.03° C

(64.46° F)

  • yesterday: 18.08° C (64.55° F)
  • a week ago: 18.03° C (64.45° F)

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

The average sea temperature for Fremantle on September 26th over the last 10 years is 18.32° C (64.98° F), with a low temperature of 17.19° C (62.94° F) and a high of 19.28° C (66.7° F).

Analysis and forecast for Fremantle water temperatures

The water temperature in Fremantle today is lower than the average temperature of 18.32° C (64.98° F) and the temperature on this day last year, 26th September 2022, was 18.05° C (64.49° F).

The chart and table below shows the change in water temperature in Fremantle over the last 30 days:

Date Temperature (Celsius) Temperature (Fahrenheit)
September 26 18.03° C 64.46° F
September 25 18.08° C 64.55° F
September 24 18.18° C 64.72° F
September 23 18.03° C 64.45° F
September 22 18.34° C 65.01° F
September 21 18.12° C 64.62° F
September 20 18.11° C 64.6° F
September 19 18.03° C 64.45° F
September 18 18.19° C 64.74° F
September 17 18.2° C 64.76° F
September 16 18.48° C 65.26° F
September 15 18.6° C 65.48° F
September 14 18.5° C 65.3° F
September 13 18.62° C 65.52° F
September 12 18.45° C 65.21° F
September 11 18.4° C 65.12° F
September 10 18.05° C 64.49° F
September 9 17.94° C 64.29° F
September 8 17.78° C 64° F
September 7 17.74° C 63.93° F
September 6 17.94° C 64.29° F
September 5 18.22° C 64.8° F
September 4 18° C 64.4° F
September 3 18.37° C 65.07° F
September 2 18.32° C 64.98° F
September 1 18.57° C 65.43° F
August 31 18.76° C 65.77° F
August 30 18.63° C 65.53° F
August 29 18.69° C 65.64° F
August 28 18.84° C 65.91° F
August 27 18.84° C 65.91° F

The actual nearshore temperatures may vary by several degrees and this can also be heavily affected by weather. Strong winds can cause cold, deep waters to replace the surface waters that had been warmed by the sun, and heavy rain can also reduce the temperature of the sea surface temperature as well.

Water temperature in Fremantle by month

The chart below shows the monthly average water temperature in Fremantle.

For more detailed information on how the sea temperature in Fremantle changes for each month of the year, choose from the months below.

Fremantle map and nearby water temperatures

Locations near Fremantle

The highest temperature in Australia today is 29.21° C (84.58° F) in Darwin. The lowest is in Austins Ferry, where the temperature of the water is 11.72° C (53.1° F).

Why measure sea surface temperatures (SST) in Fremantle?

The ocean covers about 71% of the Earth's surface, and scientists record the sea surface temperature (SST) of locations such as Fremantle because they want to understand and learn how the ocean communicates with the atomosphere of Earth.

SST is one measure that provides information on the global climate, and it can be used to predict the weather in Fremantle as well as atmospheric model simulations and to study marine ecosystems in the area.

Data source and citation

Raw data for the calculations made to find the sea surface temperature in Fremantle comes from the National Oceanic and Atmospheric Administration (NOAA) and their 1/4° daily Optimum Interpolation Sea Surface Temperature.

The water temperature data is constructed by combining observations from different platforms (satellites, ships, buoys, and Argo floats) on a regular global grid. A spatially complete sea surface temperature map is then built by interpolating to fill in gaps in the data.

If you'd like to use any of the information above in the format it is presented, please use the citation tool below.

  • "Fremantle Sea Temperature". Accessed on September 26, 2023.

  • "Fremantle Sea Temperature"., Accessed 26 September, 2023

  • Fremantle Sea Temperature. Retrieved from