Georgetown Sea Temperature

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

Water temperature in Georgetown right now

Below is the current sea temperature for Georgetown, Ascension Island on 28th April 2025.

28.95° C

(84.12° F)

  • yesterday: 28.89° C (84.01° F)
  • a week ago: 27.51° C (81.52° 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 Georgetown on April 28th over the last 10 years is 28.13° C (82.63° F), with a low temperature of 27.34° C (81.21° F) and a high of 29.02° C (84.24° F).

Analysis and forecast for Georgetown water temperatures

The water temperature in Georgetown today is higher than the average temperature of 28.13° C (82.63° F) and the temperature on this day last year, 28th April 2024, was 29.02° C (84.24° F).

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

Date Temperature (Celsius) Temperature (Fahrenheit)
April 28 28.95° C 84.12° F
April 27 28.89° C 84.01° F
April 25 27.56° C 81.61° F
April 24 27.61° C 81.7° F
April 23 27.56° C 81.61° F
April 22 27.56° C 81.61° F
April 21 27.51° C 81.52° F
April 20 27.57° C 81.63° F
April 19 27.63° C 81.73° F
April 18 27.71° C 81.88° F
April 17 27.68° C 81.82° F
April 16 27.79° C 82.02° F
April 15 27.74° C 81.93° F
April 14 27.91° C 82.24° F
April 13 27.82° C 82.08° F
April 12 28.01° C 82.42° F
April 11 27.53° C 81.55° F
April 10 27.48° C 81.46° F
April 9 27.45° C 81.41° F
April 8 27.48° C 81.46° F
April 7 27.56° C 81.61° F
April 6 27.56° C 81.61° F
April 5 27.53° C 81.55° F
April 4 27.56° C 81.61° F
April 3 27.47° C 81.45° F
April 2 27.56° C 81.61° F
April 1 27.58° C 81.64° F
March 31 27.55° C 81.59° F
March 30 27.61° C 81.7° F
March 29 27.64° C 81.75° F
March 28 27.73° C 81.91° 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 Georgetown by month

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

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

Georgetown map and nearby water temperatures

The highest temperature in Ascension Island today is 29.42° C (84.96° F) in Georgetown. The lowest is in Georgetown, where the temperature of the water is 29.42° C (84.96° F).

Why measure sea surface temperatures (SST) in Georgetown?

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

  • "Georgetown Sea Temperature". SeaTemperatures.net. Accessed on April 28, 2025. http://seatemperatures.net/africa/ascension-island/georgetown/.

  • "Georgetown Sea Temperature". SeaTemperatures.net, http://seatemperatures.net/africa/ascension-island/georgetown/. Accessed 28 April, 2025

  • Georgetown Sea Temperature. SeaTemperatures.net. Retrieved from http://seatemperatures.net/africa/ascension-island/georgetown/.