World sea water temperatures

Water temperature in Dennis Port in May

Is it warm enough to swim in Dennis Port in May? Average water temperature in Dennis Port in May is 52°F and therefore is not suitable for comfortable swimming. The warmest sea in Dennis Port in May is 61.9°F, and the coldest is 45°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Dennis Port

Changes water temperature in Dennis Port in May 2025, 2024

To get an accurate forecast for the water temperature in Dennis Port for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Dennis Port, 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 150.5°F49.6°F45°F50.5°F
May 250.5°F48.7°F45.9°F50.5°F
May 350.9°F49.6°F46.2°F51.3°F
May 448.9°F49.6°F45.9°F50.9°F
May 549.6°F48.9°F46.6°F51.3°F
May 650°F48.9°F46.8°F51.4°F
May 752.3°F48°F46.2°F52.3°F
May 852.3°F49.1°F47.1°F53.2°F
May 951.8°F50°F47.7°F53.6°F
May 1053.6°F51.4°F47.7°F53.6°F
May 1154°F51.4°F47.1°F54°F
May 1253.8°F49.8°F47.5°F53.8°F
May 1351.3°F51.8°F47.1°F53.4°F
May 1453.1°F51.4°F46.9°F54.7°F
May 1553.1°F52.2°F48.6°F55°F
Day 2025 2024 Min Max
May 1653.2°F52.2°F49.1°F55°F
May 1754.5°F51.6°F48.4°F56.1°F
May 1855.9°F52°F49.1°F56.7°F
May 1955.9°F52.9°F49.1°F56.8°F
May 2054.9°F50.2°F49.3°F56.3°F
May 2154.9°F50.4°F49.5°F58.3°F
May 2254°F53.6°F50.2°F57°F
May 2352.9°F55.9°F50.9°F57.6°F
May 2453.2°F56.3°F50.7°F59°F
May 2552.9°F56.1°F51.6°F58.6°F
May 2654.5°F55.6°F52.2°F59.7°F
May 2753.4°F56.1°F52.5°F59°F
May 2853.8°F57.7°F53.1°F59.7°F
May 2954.7°F59.7°F52.7°F60.6°F
May 3051.1°F58.3°F51.1°F60.8°F
May 3153.8°F58.6°F53.4°F61.9°F
Dennis Port water temp chart in May

Average water temperature in Dennis Port in May over a decade

20162017201820192020
51.4°F50.5°F51.4°F51.6°F50.9°F
20212022202320242025
54.3°F52.3°F54.5°F52.5°F52.9°F

Dennis Port sea state in May

Chart comparing the height of waves in Dennis Port 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 Dennis Port in May

Dennis Port 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
Sea Street Beach52°F45°F61.9°F
Bass River52.5°F45.3°F62.2°F
Smugglers Beach52.5°F45.3°F62.2°F
Bank Street Beach51.3°F44.8°F61.5°F
Harwich Port52.2°F45°F61.9°F
West Dennis52.7°F45.1°F63.1°F
West Yarmouth53.1°F45.5°F62.6°F
Sea Gull Beach53.1°F45.5°F62.6°F
Seagull Beach53.1°F45.5°F62.6°F
Lewis Bay53.1°F45.5°F62.6°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 Dennis Port 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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