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Water temperature in Cape Henlopen (DE) in May

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Is it warm enough to swim in Cape Henlopen in May? Average water temperature in Cape Henlopen in May is 58.6°F and therefore is not suitable for comfortable swimming. The warmest sea in Cape Henlopen in May is 71.2°F, and the coldest is 50.4°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Cape Henlopen

Changes water temperature in Cape Henlopen in May 2025, 2024

To get an accurate forecast for the water temperature in Cape Henlopen for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Cape Henlopen, 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 153.4°F55.9°F50.4°F57.9°F
May 254.1°F56.1°F51.4°F59.4°F
May 354.7°F56.7°F52.5°F57.7°F
May 454.1°F56.5°F52.9°F58.5°F
May 554.7°F56.5°F53.6°F58.5°F
May 657.6°F56.7°F53.6°F61.2°F
May 755.4°F56.8°F53.4°F59.7°F
May 856.5°F56.5°F53.8°F59.4°F
May 956.5°F56.5°F53.4°F60.1°F
May 1057.6°F57.7°F52.3°F59.5°F
May 1159.7°F57.2°F52°F59.9°F
May 1257.7°F57.2°F52.5°F59.9°F
May 1356.1°F57°F52.7°F60.4°F
May 1459.2°F56.5°F52.9°F59.9°F
May 1561.9°F58.8°F54.3°F61.9°F
Day 2025 2024 Min Max
May 1660.4°F57°F55.4°F61.2°F
May 1761.9°F57.4°F55.2°F61.9°F
May 1860.8°F58.6°F55.2°F61.2°F
May 1962.8°F61.5°F56.1°F62.8°F
May 2062.1°F58.3°F55.4°F62.1°F
May 2162.1°F59.5°F55.9°F62.8°F
May 2261.2°F60.8°F54.7°F63.1°F
May 2360.4°F62.4°F55.8°F64°F
May 2460.3°F60.8°F56.1°F64.9°F
May 2560.1°F62.1°F52.7°F65.5°F
May 2661.2°F62.4°F55.8°F67.8°F
May 2760.6°F65.7°F58.3°F67.6°F
May 2858.6°F64.2°F58.6°F68°F
May 2959.5°F64.8°F58.5°F68.5°F
May 3061.3°F63.9°F60.4°F70.5°F
May 3161.7°F63.9°F61°F71.2°F
Cape Henlopen water temp chart in May

Average water temperature in Cape Henlopen in May over a decade

20162017201820192020
57°F58.6°F59°F60.3°F55.4°F
20212022202320242025
58.6°F57°F60.1°F59.2°F58.8°F

Cape Henlopen sea state in May

Chart comparing the height of waves in Cape Henlopen 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 Cape Henlopen in May

Cape Henlopen 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
Broadkill Beach59.7°F51.3°F71.8°F
Towers Beach58.5°F50°F71.1°F
Rehoboth Bay58.6°F50°F71.1°F
Cape May Point58.5°F50.2°F70.9°F
Lower Township58.8°F50.4°F71.1°F
Wildwood57.4°F49.3°F70.2°F
Villas60.1°F51.4°F71.4°F
Dover61.9°F52.5°F72.7°F
Avalon57.2°F49.1°F69.8°F
Ocean City58.6°F50°F71.2°F

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  • rural Delaware Bay, middle section, Nantuxent Cove, picture taken at Money Island NJ
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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 Cape Henlopen 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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