World sea water temperatures

Water temperature in Harrisville (MI) in September

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Is it warm enough to swim in Harrisville in September? Average water temperature in Harrisville in September is 65.5°F and therefore is not suitable for comfortable swimming. The warmest water in Harrisville in September is 71.8°F, and the coldest is 56.7°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Harrisville

Changes water temperature in Harrisville in September 2025, 2024

To get an accurate forecast for the water temperature in Harrisville for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Harrisville, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of September.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
September 164.9°F69.8°F64.9°F71.8°F
September 265.8°F68.7°F65.5°F71.6°F
September 366.2°F68.4°F65.1°F71.1°F
September 466.2°F68.2°F63.5°F70.3°F
September 5 68°F62.6°F70.5°F
September 6 68°F63.9°F70.3°F
September 7 67.8°F63.9°F70.5°F
September 8 66.4°F63.5°F71.4°F
September 9 64.9°F62.6°F71.1°F
September 10 64.6°F63.5°F70.5°F
September 11 65.3°F62.8°F68.7°F
September 12 65.3°F61.5°F68.5°F
September 13 65.8°F60.3°F68°F
September 14 67.1°F60.8°F68.2°F
September 15 67.6°F61°F68°F
Day 2025 2024 Min Max
September 16 68.4°F60.4°F69.1°F
September 17 68.2°F60.4°F70°F
September 18 68.4°F60.1°F68.9°F
September 19 68.9°F59.4°F68.9°F
September 20 68.4°F58.1°F68.4°F
September 21 68.7°F57.7°F68.7°F
September 22 68.4°F56.7°F68.4°F
September 23 68°F56.8°F68°F
September 24 67.3°F57.4°F67.3°F
September 25 68°F57.4°F68°F
September 26 67.1°F58.1°F68.7°F
September 27 68°F58.8°F68°F
September 28 67.5°F59.5°F67.5°F
September 29 67.5°F59.5°F67.5°F
September 30 67.5°F58.6°F67.5°F
Harrisville water temp chart in September

Average water temperature in Harrisville in September over a decade

20152016201720182019
65.1°F67.5°F65.5°F66.6°F63.1°F
20202021202220232024
64.8°F67.3°F66.6°F65.8°F67.5°F

Harrisville sea state in September

Chart comparing the height of waves in Harrisville in September 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 Harrisville in September

Harrisville 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 September?

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

AvrMinMax
Alcona65.1°F56.1°F71.8°F
Black River64.9°F55.8°F72°F
Oscoda66.2°F57.9°F73°F
Ossineke64.4°F55.2°F71.4°F
Thunder Bay64.2°F55°F71.1°F
Alpena64.2°F55°F71.6°F
Tawas City66.6°F58.8°F73.6°F
Oak Beach66.9°F59°F74.1°F
Port Crescent66.9°F59°F73.6°F
Caseville67.5°F59.4°F76.1°F

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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 Harrisville 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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