St Kilda beach Sea Temperature

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

Water temperature in St Kilda beach right now

Below is the current sea temperature for St Kilda beach, Australia on 18th July 2025.

11.57° C

(52.82° F)

  • yesterday: 11.62° C (52.91° F)
  • a week ago: 11.61° C (52.9° F)

Water at this temperature is cold and will feel very cold initially, but the body will get used to it and longer swims are possible. Experienced swimmers can manage several hours of swimming, however hypothermia is still a very big risk.

The average sea temperature for St Kilda beach on July 18th over the last 10 years is 11.49° C (52.68° F), with a low temperature of 10.89° C (51.6° F) and a high of 12.14° C (53.85° F).

Analysis and forecast for St Kilda beach water temperatures

The water temperature in St Kilda beach today is higher than the average temperature of 11.49° C (52.68° F) and the temperature on this day last year, 18th July 2024, was 11.53° C (52.75° F).

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

Date Temperature (Celsius) Temperature (Fahrenheit)
July 18 11.57° C 52.82° F
July 17 11.62° C 52.91° F
July 16 11.57° C 52.83° F
July 15 11.6° C 52.88° F
July 14 11.67° C 53.01° F
July 13 11.71° C 53.08° F
July 12 11.47° C 52.65° F
July 11 11.61° C 52.9° F
July 10 11.78° C 53.2° F
July 9 11.75° C 53.15° F
July 8 11.85° C 53.33° F
July 7 11.92° C 53.46° F
July 6 11.77° C 53.19° F
July 5 11.87° C 53.37° F
July 4 11.9° C 53.42° F
July 3 12.12° C 53.82° F
July 2 12.1° C 53.78° F
July 1 12.12° C 53.82° F
June 30 12.02° C 53.64° F
June 29 12.02° C 53.64° F
June 28 12.04° C 53.67° F
June 27 12.18° C 53.92° F
June 26 12.27° C 54.09° F
June 25 12.35° C 54.23° F
June 24 12.49° C 54.48° F
June 23 12.57° C 54.63° F
June 22 12.34° C 54.21° F
June 21 12.5° C 54.5° F
June 20 12.54° C 54.57° F
June 19 12.53° C 54.55° F
June 18 12.81° C 55.06° 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 St Kilda beach by month

The chart below shows the monthly average water temperature in St Kilda beach.

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

St Kilda beach map and nearby water temperatures

Locations near St Kilda beach

The highest temperature in Australia today is 26.76° C (80.16° F) in Darwin. The lowest is in Port Phillip Bay, where the temperature of the water is 10.73° C (51.31° F).

Why measure sea surface temperatures (SST) in St Kilda beach?

The ocean covers about 71% of the Earth's surface, and scientists record the sea surface temperature (SST) of locations such as St Kilda beach 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 St Kilda beach 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 St Kilda beach 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.

  • "St Kilda beach Sea Temperature". SeaTemperatures.net. Accessed on July 18, 2025. http://seatemperatures.net/australia-and-oceania/australia/st-kilda-beach/.

  • "St Kilda beach Sea Temperature". SeaTemperatures.net, http://seatemperatures.net/australia-and-oceania/australia/st-kilda-beach/. Accessed 18 July, 2025

  • St Kilda beach Sea Temperature. SeaTemperatures.net. Retrieved from http://seatemperatures.net/australia-and-oceania/australia/st-kilda-beach/.