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Water temperature in Au Sable (MI) in August

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Is it warm enough to swim in Au Sable in August? Average water temperature in Au Sable in August is 70°F and therefore suitable for comfortable swimming. The warmest sea in Au Sable in August is 75.7°F, and the coldest is 64.8°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Au Sable

Changes water temperature in Au Sable in August 2025, 2024

To get an accurate forecast for the water temperature in Au Sable for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Au Sable, 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 171.8°F73.8°F64.8°F73.8°F
August 271.1°F75.4°F66.2°F75.4°F
August 370.7°F75.2°F66.6°F75.2°F
August 471.1°F74.7°F66.7°F74.7°F
August 571.8°F75.7°F66.6°F75.7°F
August 671.6°F74.7°F66.6°F74.7°F
August 772.3°F73.8°F66.9°F73.8°F
August 872.7°F73.4°F66.9°F73.4°F
August 972.7°F73.8°F66.9°F73.8°F
August 1073.2°F73.2°F66.9°F73.9°F
August 1174.3°F72.1°F66.9°F74.3°F
August 1274.7°F70.7°F66.9°F74.7°F
August 1374.1°F69.8°F66.4°F74.1°F
August 1474.8°F70.3°F65.7°F74.8°F
August 1574.5°F71.4°F65.3°F74.5°F
Day 2025 2024 Min Max
August 1672.1°F72.3°F64.9°F74.3°F
August 1772.7°F72°F64.9°F73.9°F
August 1872°F71.6°F65.3°F74.3°F
August 1971.8°F70.7°F66.4°F73.9°F
August 2070°F69.4°F66.6°F74.1°F
August 2169.6°F68.2°F67.3°F73.9°F
August 2269.6°F68°F66.6°F73.2°F
August 2370.2°F68.7°F66.6°F73.4°F
August 2469.8°F68.7°F66.7°F73.6°F
August 2568.7°F69.3°F65.8°F73.4°F
August 2668.4°F70.3°F65.1°F73.6°F
August 2767.1°F70.7°F64.9°F73.6°F
August 2866.6°F70.5°F65.1°F73.4°F
August 2966°F70.2°F65.1°F73.9°F
August 3065.7°F69.4°F65.5°F73.6°F
August 3165.3°F70.2°F65.3°F73.4°F
Au Sable water temp chart in August

Average water temperature in Au Sable in August over a decade

20162017201820192020
72.9°F67.5°F72°F69.3°F72.5°F
20212022202320242025
71.4°F69.4°F68.9°F71.6°F71.8°F

Au Sable 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

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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 Au Sable 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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