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Water temperature in American River (Folsom) (CA) in August

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Is it warm enough to swim in American River (Folsom) in August? Average water temperature in American River (Folsom) in August is 78.8°F and therefore suitable for comfortable swimming. The warmest water in American River (Folsom) in August is 89.6°F, and the coldest is 68°F. To find out the water temperature today and in the coming days, go to Current water temperature in American River (Folsom)

Changes water temperature in American River (Folsom) in August 2025, 2024

To get an accurate forecast for the water temperature in American River (Folsom) for any chosen month, compare two years within a 10 year range using the chart below.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024
August 175.2°F 
August 275.2°F80.6°F
August 375.2°F82.4°F
August 477°F 
August 577°F 
August 677°F80.6°F
August 778.8°F82.4°F
August 880.6°F82.4°F
August 980.6°F80.6°F
August 1082.4°F 
August 1180.6°F80.6°F
August 1278.8°F 
August 1378.8°F 
August 1477°F78.8°F
August 1575.2°F77°F
Day 2025 2024
August 1675.2°F77°F
August 1773.4°F75.2°F
August 1877°F75.2°F
August 1978.8°F77°F
August 2078.8°F75.2°F
August 2178.8°F73.4°F
August 2278.8°F73.4°F
August 2380.6°F71.6°F
August 2480.6°F73.4°F
August 2580.6°F73.4°F
August 2680.6°F73.4°F
August 2778.8°F75.2°F
August 2880.6°F77°F
August 2980.6°F77°F
August 3080.6°F78.8°F
August 3180.6°F77°F

Average water temperature in American River (Folsom) in August over a decade

20162017201820192020
75.2°F78.6°F82°F
20212022202320242025
79.9°F78.3°F80.2°F77.2°F78.4°F

American River (Folsom) 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

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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 American River (Folsom) 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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