World sea water temperatures

Water temperature in Harvey (MI) in September

Is it warm enough to swim in Harvey in September? Average water temperature in Harvey in September is 61.2°F and therefore is not suitable for comfortable swimming. The warmest water in Harvey in September is 67.8°F, and the coldest is 50.7°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Harvey

Changes water temperature in Harvey in September 2025, 2024

To get an accurate forecast for the water temperature in Harvey for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Harvey, 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 164.2°F64.9°F60.1°F67.3°F
September 264.4°F64.4°F59.7°F67.3°F
September 364.4°F64.6°F59.2°F67.6°F
September 464°F64.4°F59.4°F67.6°F
September 5 64.6°F59.5°F67.8°F
September 6 62.8°F58.6°F67.6°F
September 7 62.8°F56.7°F66.7°F
September 8 61.7°F55.8°F66.9°F
September 9 61.9°F58.8°F66.4°F
September 10 61.3°F59°F66°F
September 11 61.5°F55.9°F65.5°F
September 12 63°F53.8°F64.9°F
September 13 63.7°F52.5°F64.8°F
September 14 64.4°F54.5°F65.1°F
September 15 65.3°F54.5°F65.3°F
Day 2025 2024 Min Max
September 16 64.9°F53.6°F64.9°F
September 17 64.9°F53.6°F64.9°F
September 18 64.4°F53.4°F64.8°F
September 19 64.8°F54.3°F64.8°F
September 20 65.5°F53.8°F65.5°F
September 21 64.6°F52.7°F64.6°F
September 22 65.1°F54.5°F65.1°F
September 23 64°F53.1°F64°F
September 24 63.5°F52.7°F63.9°F
September 25 61.9°F50.7°F63.5°F
September 26 63.1°F50.7°F63.3°F
September 27 64°F50.9°F64°F
September 28 63.9°F51.6°F63.9°F
September 29 64.4°F51.4°F64.4°F
September 30 64°F51.6°F64°F
Harvey water temp chart in September

Average water temperature in Harvey in September over a decade

20152016201720182019
62.4°F64.8°F60.1°F58.3°F59.2°F
20202021202220232024
59.9°F63.5°F62.8°F61°F63.9°F

Harvey sea state in September

Chart comparing the height of waves in Harvey 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 Harvey in September

Harvey 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
Marquette61.2°F50.5°F67.8°F
Rock River61.7°F51.4°F69.3°F
Au Train61.9°F51.4°F70°F
Christmas61.9°F51.8°F70.3°F
Munising61.9°F52.3°F68.5°F
Pictured Rocks61.3°F51.8°F67.5°F
Keweenaw Bay61.9°F52.2°F69.3°F
Gladstone64.9°F57.4°F72.3°F
Rapid River64.9°F57.4°F72.3°F
L'Anse62.6°F50.9°F72.5°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 Harvey 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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