Saint John's Sea Temperature

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

Water temperature in Saint John's right now

Below is the current sea temperature for Saint John's, Antigua and Barbuda on 26th May 2022.

27.64° C

(81.76° F)

  • yesterday: 27.43° C (81.38° F)
  • a week ago: 27.47° C (81.45° 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 Saint John's on May 26th over the last 10 years is 27.6° C (81.69° F), with a low temperature of 26.9° C (80.42° F) and a high of 28.56° C (83.41° F).

Analysis and forecast for Saint John's water temperatures

The water temperature in Saint John's today is higher than the average temperature of 27.6° C (81.69° F) and the temperature on this day last year, 26th May 2021, was 27.64° C (81.75° F).

The chart and table below shows the change in water temperature in Saint John's over the last 30 days:

Date Temperature (Celsius) Temperature (Fahrenheit)
May 26 27.64° C 81.76° F
May 25 27.43° C 81.38° F
May 24 28.05° C 82.49° F
May 23 27.99° C 82.38° F
May 22 27.99° C 82.38° F
May 21 27.97° C 82.35° F
May 20 27.7° C 81.86° F
May 19 27.47° C 81.45° F
May 18 27.41° C 81.34° F
May 17 27.38° C 81.28° F
May 16 27.54° C 81.57° F
May 15 27.45° C 81.41° F
May 14 27.62° C 81.72° F
May 13 27.54° C 81.57° F
May 12 27.51° C 81.52° F
May 11 27.38° C 81.28° F
May 10 27.69° C 81.84° F
May 9 27.63° C 81.73° F
May 8 27.51° C 81.52° F
May 7 27.48° C 81.46° F
May 6 27.42° C 81.36° F
May 5 27.33° C 81.19° F
May 4 27.21° C 80.98° F
May 3 27.04° C 80.67° F
May 2 26.85° C 80.33° F
May 1 26.65° C 79.97° F
April 30 26.68° C 80.02° F
April 29 26.49° C 79.68° F
April 28 26.47° C 79.65° F
April 27 26.56° C 79.81° F
April 26 26.61° C 79.9° 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 Saint John's by month

The chart below shows the monthly average water temperature in Saint John's.

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

Saint John's map and nearby water temperatures

Locations near Saint John's

The highest temperature in Antigua and Barbuda today is 27.38° C (81.29° F) in Falmouth. The lowest is in Falmouth, where the temperature of the water is 27.38° C (81.29° F).

Why measure sea surface temperatures (SST) in Saint John's?

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

  • "Saint John's Sea Temperature". SeaTemperatures.net. Accessed on May 26, 2022. http://seatemperatures.net/central-america-and-the-caribbean/antigua-and-barbuda/saint-johns/.

  • "Saint John's Sea Temperature". SeaTemperatures.net, http://seatemperatures.net/central-america-and-the-caribbean/antigua-and-barbuda/saint-johns/. Accessed 26 May, 2022

  • Saint John's Sea Temperature. SeaTemperatures.net. Retrieved from http://seatemperatures.net/central-america-and-the-caribbean/antigua-and-barbuda/saint-johns/.