World sea water temperatures

Water temperature in Portsmouth (NC) in May

Is it warm enough to swim in Portsmouth in May? Average water temperature in Portsmouth in May is 71.2°F and therefore suitable for comfortable swimming. The warmest sea in Portsmouth in May is 78.1°F, and the coldest is 63°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Portsmouth

Changes water temperature in Portsmouth in May 2025, 2024

To get an accurate forecast for the water temperature in Portsmouth for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Portsmouth, 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 168°F64.2°F64.2°F73.8°F
May 268.4°F66.6°F65.8°F73.9°F
May 368.7°F66.2°F66.2°F73.4°F
May 468.2°F67.3°F66.2°F73°F
May 568.5°F69.1°F66.7°F72.9°F
May 670.3°F68.4°F67.5°F72.3°F
May 770.2°F68.4°F66.6°F71.2°F
May 871.2°F67.1°F67.1°F72°F
May 972°F69.1°F67.1°F72.7°F
May 1072.1°F66.4°F66.4°F73°F
May 1172.1°F65.7°F65.7°F73°F
May 1271.8°F65.7°F65.7°F73.2°F
May 1372°F65.1°F65.1°F72.9°F
May 1472.7°F65.5°F63°F73.2°F
May 1573.6°F66.7°F66.7°F73.6°F
Day 2025 2024 Min Max
May 1674.5°F67.8°F67.5°F74.5°F
May 1773°F69.3°F68.2°F73°F
May 1872.5°F69.8°F68.4°F73.2°F
May 1973.9°F65.3°F65.3°F74.1°F
May 2073.4°F66.9°F66.9°F73.6°F
May 2174.5°F67.3°F67.3°F74.5°F
May 2274.7°F67.1°F67.1°F74.8°F
May 2373.9°F67.5°F67.5°F73.9°F
May 2473.9°F69.3°F69.3°F74.7°F
May 2574.3°F70.5°F70.5°F75.4°F
May 2674.3°F74.5°F70.2°F76.6°F
May 2774.3°F73.6°F71.1°F75.9°F
May 2871.8°F73°F70.7°F76.8°F
May 2972.7°F72.5°F70.2°F76.6°F
May 3073.2°F73.9°F70.3°F77.9°F
May 3173.4°F73.8°F70°F78.1°F
Portsmouth water temp chart in May

Average water temperature in Portsmouth in May over a decade

20162017201820192020
71.1°F72.5°F71.8°F72.9°F70°F
20212022202320242025
70.7°F71.1°F70°F68.5°F72.1°F

Portsmouth sea state in May

Chart comparing the height of waves in Portsmouth 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 Portsmouth in May

Portsmouth 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
Davis71.1°F65.1°F78.6°F
Buxton70.5°F61.2°F78.3°F
Engelhard71.2°F61.2°F80.1°F
Cape Hatteras70.7°F59.4°F78.3°F
Oriental72°F63.5°F81.1°F
Outer Banks70°F59.2°F78.1°F
Harkers Island71.2°F63.1°F79.3°F
Cape Lookout71.1°F64.4°F78.4°F
Beaufort71.2°F63.9°F80.8°F
Minnesott Beach72°F62.1°F82.2°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 Portsmouth 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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