Hillarys Sea Temperature

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

Water temperature in Hillarys right now

Below is the current sea temperature for Hillarys, Australia on 21st June 2024.

19.56° C

(67.22° F)

  • yesterday: 19.52° C (67.14° F)
  • a week ago: 21.33° C (70.39° 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 Hillarys on June 21st over the last 10 years is 20.45° C (68.81° F), with a low temperature of 18.8° C (65.84° F) and a high of 21.56° C (70.81° F).

Analysis and forecast for Hillarys water temperatures

The water temperature in Hillarys today is lower than the average temperature of 20.45° C (68.81° F) and the temperature on this day last year, 21st June 2023, was 19.5° C (67.1° F).

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

Date Temperature (Celsius) Temperature (Fahrenheit)
June 21 19.56° C 67.22° F
June 20 19.52° C 67.14° F
June 19 20.76° C 69.37° F
June 18 21° C 69.8° F
June 17 21.12° C 70.02° F
June 16 21.04° C 69.87° F
June 15 21.33° C 70.39° F
June 14 21.33° C 70.39° F
June 13 21.43° C 70.57° F
June 12 21.36° C 70.45° F
June 11 21.35° C 70.43° F
June 10 21.34° C 70.41° F
June 9 21.21° C 70.18° F
June 8 21.84° C 71.31° F
June 7 21.32° C 70.38° F
June 6 21.2° C 70.16° F
June 5 21.5° C 70.7° F
June 4 21.46° C 70.63° F
June 3 21.66° C 70.99° F
June 2 21.79° C 71.22° F
June 1 21.93° C 71.47° F
May 31 21.91° C 71.44° F
May 30 21.99° C 71.58° F
May 29 22.1° C 71.78° F
May 28 22.18° C 71.92° F
May 27 22.22° C 72° F
May 26 22.14° C 71.85° F
May 25 22.21° C 71.98° F
May 24 22.35° C 72.23° F
May 23 22.43° C 72.37° F
May 22 22.41° C 72.34° 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 Hillarys by month

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

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

Hillarys map and nearby water temperatures

Locations near Hillarys

The highest temperature in Australia today is 26.89° C (80.41° F) in Port Musgrave. The lowest is in Port Phillip Bay, where the temperature of the water is 13.07° C (55.53° F).

Why measure sea surface temperatures (SST) in Hillarys?

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

  • "Hillarys Sea Temperature". SeaTemperatures.net. Accessed on June 21, 2024. http://seatemperatures.net/australia-and-oceania/australia/hillarys/.

  • "Hillarys Sea Temperature". SeaTemperatures.net, http://seatemperatures.net/australia-and-oceania/australia/hillarys/. Accessed 21 June, 2024

  • Hillarys Sea Temperature. SeaTemperatures.net. Retrieved from http://seatemperatures.net/australia-and-oceania/australia/hillarys/.