World sea water temperatures

Water temperature in Bethany Beach (DE) in May

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Is it warm enough to swim in Bethany Beach in May? Average water temperature in Bethany Beach in May is 58.5°F and therefore is not suitable for comfortable swimming. The warmest sea in Bethany Beach in May is 71.1°F, and the coldest is 49.6°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Bethany Beach

Changes water temperature in Bethany Beach in May 2025, 2024

To get an accurate forecast for the water temperature in Bethany Beach for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Bethany Beach, 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 155.9°F56.3°F49.6°F56.8°F
May 255.6°F55.8°F50.4°F57.9°F
May 355.6°F55.6°F51.8°F57.9°F
May 454.9°F55°F52.3°F58.1°F
May 555.9°F55.4°F52.9°F58.5°F
May 657.2°F56.3°F52.5°F61.3°F
May 757.6°F58.8°F51.4°F59.7°F
May 860.1°F56.8°F51.6°F60.1°F
May 960.1°F57.4°F52.2°F60.1°F
May 1058.6°F57.2°F51.6°F59.5°F
May 1159.2°F57°F51.6°F59.7°F
May 1259.5°F56.8°F52.2°F60.3°F
May 1359°F56.8°F51.8°F60.4°F
May 1460.1°F55.4°F52°F60.8°F
May 1560.6°F55.4°F53.6°F61°F
Day 2025 2024 Min Max
May 1660.6°F56.7°F54.7°F61.7°F
May 1760.6°F58.1°F54.9°F61.3°F
May 1860.8°F58.1°F55.4°F61.9°F
May 1962.1°F58.6°F55.6°F63.1°F
May 2062.2°F58.5°F55.4°F62.2°F
May 2162.1°F60.8°F55.6°F63.1°F
May 2260.6°F60.4°F56.3°F63.3°F
May 2360.3°F61°F57.2°F65.1°F
May 2460.1°F62.6°F58.5°F64.9°F
May 2560.3°F63.1°F54.9°F65.5°F
May 2661.5°F63.9°F56.5°F68°F
May 2761.5°F62.2°F56.1°F67.6°F
May 2860.3°F62.4°F57°F68°F
May 2961.7°F64.6°F58.8°F68.4°F
May 3062.2°F64.2°F60.1°F70.2°F
May 3161.3°F63.3°F60.3°F71.1°F
Bethany Beach water temp chart in May

Average water temperature in Bethany Beach in May over a decade

20162017201820192020
56.7°F58.1°F58.5°F59.9°F55.9°F
20212022202320242025
58.6°F56.8°F60.3°F58.8°F59.5°F

Bethany Beach sea state in May

Chart comparing the height of waves in Bethany Beach 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 Bethany Beach in May

Bethany Beach 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
Indian River Inlet58.6°F50°F71.1°F
Fenwick Island58.5°F49.6°F71.1°F
Rehoboth Bay58.6°F50°F71.1°F
Towers Beach58.5°F50°F71.1°F
Cape Henlopen58.6°F50.4°F71.2°F
Broadkill Beach59.7°F51.3°F71.8°F
Slaughter Beach60.6°F52.2°F72.1°F
Cape May Point58.5°F50.2°F70.9°F
Cape May57.7°F49.6°F70.5°F
Diamond Beach57.6°F49.3°F70.3°F

Bethany Beach photo gallery

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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 Bethany Beach 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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