Heron island Sea Temperature

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

Water temperature in Heron island right now

Below is the current sea temperature for Heron island, Australia on 13th December 2025.

27.6° C

(81.68° F)

  • yesterday: 27.54° C (81.57° F)
  • a week ago: 27.27° C (81.09° F)

This water temperature is comparable to that of a swimming pool, but it might be higher than most open water swimmers prefer for serious swimming. Make sure to drink plenty of water before and after swimming and don't wear a wetsuit to avoid overheating.

The average sea temperature for Heron island on December 13th over the last 10 years is 26.17° C (79.1° F), with a low temperature of 25.42° C (77.76° F) and a high of 27.59° C (81.66° F).

Analysis and forecast for Heron island water temperatures

The water temperature in Heron island today is higher than the average temperature of 26.17° C (79.1° F) and the temperature on this day last year, 13th December 2024, was 27.59° C (81.66° F).

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

Date Temperature (Celsius) Temperature (Fahrenheit)
December 13 27.6° C 81.68° F
December 12 27.54° C 81.57° F
December 11 27.52° C 81.54° F
December 10 27.44° C 81.39° F
December 9 27.45° C 81.41° F
December 8 27.36° C 81.25° F
December 7 27.36° C 81.25° F
December 6 27.27° C 81.09° F
December 5 27.25° C 81.05° F
December 4 27.21° C 80.98° F
December 3 27.36° C 81.25° F
December 2 27.58° C 81.64° F
December 1 27.78° C 82° F
November 30 27.83° C 82.09° F
November 29 27.82° C 82.08° F
November 28 27.69° C 81.84° F
November 27 27.67° C 81.81° F
November 26 27.21° C 80.98° F
November 25 27.03° C 80.65° F
November 24 26.89° C 80.4° F
November 23 26.66° C 79.99° F
November 22 26.32° C 79.38° F
November 21 26.05° C 78.89° F
November 20 25.9° C 78.62° F
November 19 25.77° C 78.39° F
November 18 25.68° C 78.22° F
November 17 25.77° C 78.39° F
November 16 25.73° C 78.31° F
November 15 25.33° C 77.59° F
November 14 25.31° C 77.56° F
November 13 25.21° C 77.38° 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 Heron island by month

The chart below shows the monthly average water temperature in Heron island.

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

Heron island map and nearby water temperatures

The highest temperature in Australia today is 30.81° C (87.46° F) in Broome. The lowest is in Bruny Island, where the temperature of the water is 15.39° C (59.7° F).

Why measure sea surface temperatures (SST) in Heron island?

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

  • "Heron island Sea Temperature". SeaTemperatures.net. Accessed on December 13, 2025. http://seatemperatures.net/australia-and-oceania/australia/heron-island/.

  • "Heron island Sea Temperature". SeaTemperatures.net, http://seatemperatures.net/australia-and-oceania/australia/heron-island/. Accessed 13 December, 2025

  • Heron island Sea Temperature. SeaTemperatures.net. Retrieved from http://seatemperatures.net/australia-and-oceania/australia/heron-island/.