Wisconsin water temperature in September

Is Wisconsin too cold to swim in fall? In September water temperature in some cities of Wisconsin is above 68°F and it is enough for comfortable bathing. Based on average water temperature observations over the past ten years, the warmest water temperature in Wisconsin in September was 68.5°F (in Lake Winnebago), and the coldest 60.3°F (in Port Wing). To find out the sea temperature today and in the coming days, go to Current sea temperature in Wisconsin

Wisconsin surface temperature in September

Wisconsin cities and resorts with the values of the average water temperature in September in recent years.
For more detailed information about water temperature, surf forecast, weather and time of sunrise and sunset in any specific area of your interest, just click on a city name. For ease of search, all places are also grouped by the first letter of the name.

To find out what the water temperature was in Wisconsin any day over a period of the last ten years, select the month

Places with the warmest average water temperature in Wisconsin in September. Also indicated are the maximum and minimum temperatures in September for these locations based on observations over the past 10 years

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Our report for United States 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.