St Lucia Sea Temperature

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

Water temperature in St Lucia right now

Below is the current sea temperature for St Lucia, South Africa on 29th March 2024.

26.27° C

(79.29° F)

  • yesterday: 26.49° C (79.69° F)
  • a week ago: 26.76° C (80.17° 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 St Lucia on March 29th over the last 10 years is 26.71° C (80.07° F), with a low temperature of 25.95° C (78.71° F) and a high of 27.4° C (81.32° F).

Analysis and forecast for St Lucia water temperatures

The water temperature in St Lucia today is lower than the average temperature of 26.71° C (80.07° F) and the temperature on this day last year, 29th March 2023, was 26.29° C (79.32° F).

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

Date Temperature (Celsius) Temperature (Fahrenheit)
March 29 26.27° C 79.29° F
March 28 26.49° C 79.69° F
March 27 26.7° C 80.06° F
March 26 26.58° C 79.84° F
March 25 26.43° C 79.57° F
March 24 26.55° C 79.79° F
March 23 26.52° C 79.74° F
March 22 26.76° C 80.17° F
March 21 26.9° C 80.42° F
March 20 26.86° C 80.35° F
March 19 26.9° C 80.42° F
March 18 26.87° C 80.37° F
March 17 26.99° C 80.58° F
March 16 27.37° C 81.27° F
March 15 27.26° C 81.07° F
March 14 27.7° C 81.86° F
March 13 27.83° C 82.09° F
March 12 27.79° C 82.02° F
March 11 27.6° C 81.68° F
March 10 27.09° C 80.76° F
March 9 26.86° C 80.35° F
March 8 27.11° C 80.8° F
March 7 27.23° C 81.01° F
March 6 27.2° C 80.96° F
March 5 27.33° C 81.19° F
March 4 27.35° C 81.23° F
March 3 27.47° C 81.45° F
March 2 27.57° C 81.63° F
March 1 27.57° C 81.63° F
February 29 27.44° C 81.39° F
February 28 27.39° C 81.3° 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 Lucia by month

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

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

St Lucia map and nearby water temperatures

The highest temperature in South Africa today is 27.56° C (81.62° F) in Sodwana Bay. The lowest is in Bloubergstrand, where the temperature of the water is 15.78° C (60.41° F).

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

The ocean covers about 71% of the Earth's surface, and scientists record the sea surface temperature (SST) of locations such as St Lucia 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 Lucia 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 Lucia 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 Lucia Sea Temperature". SeaTemperatures.net. Accessed on March 29, 2024. http://seatemperatures.net/africa/south-africa/st-lucia/.

  • "St Lucia Sea Temperature". SeaTemperatures.net, http://seatemperatures.net/africa/south-africa/st-lucia/. Accessed 29 March, 2024

  • St Lucia Sea Temperature. SeaTemperatures.net. Retrieved from http://seatemperatures.net/africa/south-africa/st-lucia/.