Hermanus Sea Temperature
Looking to find out what the sea water temperature in Hermanus is for today and the next few days? Below are data and charts that will give you information about sea temperatures in Hermanus and nearby locations.
Water temperature in Hermanus right now
Below is the current sea temperature for Hermanus, South Africa on 19th May 2024.
16.42° C
(61.56° F)
- yesterday: 16.47° C (61.65° F)
- a week ago: 15.81° C (60.46° 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 Hermanus on May 19th over the last 10 years is 16.15° C (61.06° F), with a low temperature of 13.43° C (56.17° F) and a high of 17.37° C (63.27° F).
Analysis and forecast for Hermanus water temperatures
The water temperature in Hermanus today is higher than the average temperature of 16.15° C (61.06° F) and the temperature on this day last year, 19th May 2023, was 16.52° C (61.74° F).
The chart and table below shows the change in water temperature in Hermanus over the last 30 days:
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 Hermanus by month
The chart below shows the monthly average water temperature in Hermanus.
For more detailed information on how the sea temperature in Hermanus changes for each month of the year, choose from the months below.
Hermanus map and nearby water temperatures
Locations near Hermanus
The highest temperature in South Africa today is 25.26° C (77.47° F) in Sodwana Bay. The lowest is in Port Nolloth, where the temperature of the water is 11.44° C (52.6° F).
Why measure sea surface temperatures (SST) in Hermanus?
The ocean covers about 71% of the Earth's surface, and scientists record the sea surface temperature (SST) of locations such as Hermanus 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 Hermanus 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 Hermanus 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.
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"Hermanus Sea Temperature". SeaTemperatures.net. Accessed on May 19, 2024. http://seatemperatures.net/africa/south-africa/hermanus/.
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"Hermanus Sea Temperature". SeaTemperatures.net, http://seatemperatures.net/africa/south-africa/hermanus/. Accessed 19 May, 2024
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