St Helens Sea Temperature

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

Water temperature in St Helens right now

Below is the current sea temperature for St Helens, Australia on 28th March 2024.

18.13° C

(64.64° F)

  • yesterday: 18.78° C (65.8° F)
  • a week ago: 19.03° C (66.25° 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 St Helens on March 28th over the last 10 years is 18.01° C (64.42° F), with a low temperature of 17.15° C (62.87° F) and a high of 19.31° C (66.76° F).

Analysis and forecast for St Helens water temperatures

The water temperature in St Helens today is higher than the average temperature of 18.01° C (64.42° F) and the temperature on this day last year, 28th March 2023, was 18.07° C (64.53° F).

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

Date Temperature (Celsius) Temperature (Fahrenheit)
March 28 18.13° C 64.64° F
March 27 18.78° C 65.8° F
March 26 18.87° C 65.97° F
March 25 18.93° C 66.07° F
March 24 19.02° C 66.24° F
March 23 18.9° C 66.02° F
March 22 18.85° C 65.93° F
March 21 19.03° C 66.25° F
March 20 19.22° C 66.6° F
March 19 19.34° C 66.81° F
March 18 19.37° C 66.87° F
March 17 19.19° C 66.54° F
March 16 19.13° C 66.43° F
March 15 19.4° C 66.92° F
March 14 19.29° C 66.72° F
March 13 19.5° C 67.1° F
March 12 19.35° C 66.83° F
March 11 19.55° C 67.19° F
March 10 19.41° C 66.94° F
March 9 19.22° C 66.6° F
March 8 19.19° C 66.54° F
March 7 19.57° C 67.23° F
March 6 19.11° C 66.4° F
March 5 19.12° C 66.42° F
March 4 19.17° C 66.51° F
March 3 19.3° C 66.74° F
March 2 19.4° C 66.92° F
March 1 19.55° C 67.19° F
February 29 19.6° C 67.28° F
February 28 19.65° C 67.37° F
February 27 19.54° C 67.17° 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 Helens by month

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

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

St Helens map and nearby water temperatures

The highest temperature in Australia today is 32.8° C (91.04° F) in Port Hedland. The lowest is in Bruny Island, where the temperature of the water is 16.28° C (61.31° F).

Why measure sea surface temperatures (SST) in St Helens?

The ocean covers about 71% of the Earth's surface, and scientists record the sea surface temperature (SST) of locations such as St Helens 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 Helens 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 Helens 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 Helens Sea Temperature". SeaTemperatures.net. Accessed on March 28, 2024. http://seatemperatures.net/australia-and-oceania/australia/st-helens/.

  • "St Helens Sea Temperature". SeaTemperatures.net, http://seatemperatures.net/australia-and-oceania/australia/st-helens/. Accessed 28 March, 2024

  • St Helens Sea Temperature. SeaTemperatures.net. Retrieved from http://seatemperatures.net/australia-and-oceania/australia/st-helens/.