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Water temperature in Bethany Beach (DE) in August

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Is it warm enough to swim in Bethany Beach in August? Average water temperature in Bethany Beach in August is 75°F and therefore suitable for comfortable swimming. The warmest sea in Bethany Beach in August is 80.2°F, and the coldest is 65.5°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 August 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 August.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
August 171.4°F68.2°F68.2°F79.9°F
August 273°F69.1°F69.1°F77.9°F
August 373.6°F67.3°F67.3°F78.1°F
August 473.6°F66.7°F66.7°F79.2°F
August 574.5°F68.5°F68.5°F79.2°F
August 673.6°F68°F68°F78.4°F
August 773.8°F65.5°F65.5°F78.6°F
August 873.4°F66.4°F66.4°F78.6°F
August 973.9°F66.4°F66.4°F78.3°F
August 1074.3°F67.8°F67.8°F79°F
August 1174.8°F68.5°F68.5°F79.5°F
August 1275.6°F69.3°F69.3°F80.2°F
August 1375.2°F71.1°F71.1°F79.9°F
August 1476.6°F71.4°F71.4°F79.7°F
August 1577.2°F71.4°F71.4°F79.2°F
Day 2025 2024 Min Max
August 1678.1°F72.5°F72.3°F79.2°F
August 1777.9°F70°F69.6°F78.8°F
August 1877.4°F70°F70°F79°F
August 1975.2°F70.7°F70.7°F77.9°F
August 2076.3°F68°F68°F78.1°F
August 2175.2°F67.6°F67.6°F77.9°F
August 2273.9°F67.8°F67.8°F77.5°F
August 2374.7°F69.1°F69.1°F77.9°F
August 2474.7°F69.4°F69.4°F77.4°F
August 2575.6°F69.3°F69.3°F78.3°F
August 2675.6°F69.3°F69.3°F79.2°F
August 2774.7°F69.6°F69.6°F79.2°F
August 2874.5°F71.2°F71.2°F78.4°F
August 2974.3°F71.8°F70.7°F79°F
August 3073.8°F71.2°F70°F79.2°F
August 3173.6°F72°F70.2°F79.3°F
Bethany Beach water temp chart in August

Average water temperature in Bethany Beach in August over a decade

20162017201820192020
77.4°F75.2°F77.7°F75°F76.1°F
20212022202320242025
75.9°F74.7°F72.3°F69.3°F73.4°F

Bethany Beach sea state in August

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

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 August?

Want to know where the water temperature in August 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 August. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Indian River Inlet74.8°F64.6°F79.9°F
Fenwick Island75.6°F68.4°F81°F
Rehoboth Bay75°F66.9°F79.5°F
Towers Beach74.8°F67.8°F79.3°F
Cape Henlopen75°F68.2°F79.9°F
Broadkill Beach75.7°F69.6°F81.5°F
Slaughter Beach76.5°F71.4°F82°F
Cape May Point74.7°F67.8°F80.1°F
Cape May74.5°F65.3°F79.5°F
Diamond Beach74.7°F64.8°F79.7°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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