World sea water temperatures

Water temperature in Saint John (USVI) in May

Is it warm enough to swim in Saint John in May? Average water temperature in Saint John in May is 81.7°F and therefore suitable for comfortable swimming. The warmest sea in Saint John in May is 85.3°F, and the coldest is 79.7°F. Average high air temperature in Saint John in May is 84°F, and average low temperature is 73°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Saint John

Changes water temperature in Saint John in May 2025, 2024

To get an accurate forecast for the water temperature in Saint John for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Saint John, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of May.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
May 181.9°F82.8°F79.9°F82.8°F
May 281.9°F82.9°F79.9°F82.9°F
May 381.7°F83.1°F79.7°F83.1°F
May 481.7°F83.1°F79.9°F83.1°F
May 581.9°F83.1°F79.9°F83.1°F
May 681.9°F83.5°F79.7°F83.5°F
May 782.2°F83.5°F79.9°F83.5°F
May 882.4°F83.1°F79.7°F83.1°F
May 982.4°F83.3°F79.7°F83.3°F
May 1082.6°F83.3°F79.9°F83.3°F
May 1182.8°F83.7°F80.1°F83.7°F
May 1282.8°F83.5°F80.1°F83.5°F
May 1382.4°F83.7°F80.1°F83.7°F
May 1482.4°F83.8°F80.2°F83.8°F
May 1582.2°F83.8°F80.2°F83.8°F
Day 2025 2024 Min Max
May 1682.4°F84°F79.9°F84°F
May 1782.2°F84.4°F80.2°F84.4°F
May 1882.4°F84.6°F80.2°F84.6°F
May 1982.4°F84.7°F80.4°F84.7°F
May 2082.4°F84.9°F80.2°F84.9°F
May 2182.8°F84.9°F80.2°F84.9°F
May 2282.9°F84.9°F80.2°F84.9°F
May 2383.1°F84.7°F80.6°F84.7°F
May 2482.9°F84.6°F80.6°F84.6°F
May 2582.9°F84.7°F80.6°F84.7°F
May 2683.1°F84.7°F80.6°F84.7°F
May 2783.1°F84.9°F80.8°F84.9°F
May 2883.1°F84.9°F80.8°F84.9°F
May 2982.9°F84.9°F81°F84.9°F
May 3082.8°F84.9°F81°F84.9°F
May 3183.1°F85.3°F81.1°F85.3°F
Saint John water temp chart in May

Average water temperature in Saint John in May over a decade

20162017201820192020
81.7°F81.3°F80.6°F81°F82.6°F
20212022202320242025
81.3°F81.1°F82.8°F84°F82.6°F

Saint John sea state in May

Chart comparing the height of waves in Saint John in May over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Waves height in Saint John in May

Weather and climate in Saint John in May

This data display average monthly climate indicators in Saint John in May based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip

  • Average HIGH temperature84°F
  • Average LOW temperature73°F
  • Average rainfall days12 days
  • Average rainfall130mm/5.1''
  • Average daylight13h
  • Average sunshine8h
  • Average UV index12

Saint John water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Where is the warm sea water in May?

Want to know where the water temperature in May is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

Temperature in neighboring cities

The nearest locations with the average water temperature in May. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Cruz Bay81.7°F79.7°F85.3°F
Trunk Bay81.7°F79.7°F85.3°F
Coki Beach81.7°F79.7°F85.3°F
Sapphire Beach81.7°F79.7°F85.3°F
Maho Bay81.7°F79.5°F85.3°F
Cinnamon Bay81.7°F79.5°F85.3°F
Rendezvous Bay81.7°F79.7°F85.5°F
Coral Bay81.7°F79.5°F85.3°F
Salt Pond Beach81.7°F79.7°F85.5°F
Jost Van Dyke81.5°F79.3°F84.7°F

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for Saint John is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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