World sea water temperatures

Water temperature in Alpena (MI) in September

Is it warm enough to swim in Alpena in September? Average water temperature in Alpena in September is 64.2°F and therefore is not suitable for comfortable swimming. The warmest water in Alpena in September is 71.6°F, and the coldest is 55°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Alpena

Changes water temperature in Alpena in September 2025, 2024

To get an accurate forecast for the water temperature in Alpena for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Alpena, 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 165.3°F69.6°F63.9°F71.6°F
September 265.7°F67.8°F62.1°F70.7°F
September 366°F67.8°F61.9°F70.2°F
September 464°F66.4°F60.1°F70.5°F
September 5 66°F59.5°F70.3°F
September 6 66.7°F58.6°F70.3°F
September 7 63.7°F59.5°F69.8°F
September 8 63.1°F61.2°F70.2°F
September 9 63.3°F61.3°F69.8°F
September 10 62.6°F62.6°F68.7°F
September 11 63.1°F61.5°F67.6°F
September 12 63.7°F59.9°F68°F
September 13 64.4°F59.4°F68°F
September 14 65.8°F58.8°F67.6°F
September 15 66.4°F58.5°F66.9°F
Day 2025 2024 Min Max
September 16 66.9°F58.3°F67.5°F
September 17 66.4°F58.1°F67.8°F
September 18 66.7°F56.7°F67.6°F
September 19 67.6°F55.4°F67.8°F
September 20 66.9°F55.4°F67.3°F
September 21 67.3°F55.4°F67.8°F
September 22 66.2°F55°F66.2°F
September 23 66.7°F55.8°F66.7°F
September 24 66.9°F56.3°F66.9°F
September 25 66.9°F56.5°F67.1°F
September 26 66.2°F56.7°F67.8°F
September 27 66.9°F57.2°F66.9°F
September 28 67.3°F57.4°F67.3°F
September 29 66.7°F57.2°F66.7°F
September 30 66.2°F55.9°F66.2°F
Alpena water temp chart in September

Average water temperature in Alpena in September over a decade

20152016201720182019
64.2°F65.7°F64.9°F64.9°F61°F
20202021202220232024
63.9°F66.2°F65.8°F64.6°F66°F

Alpena sea state in September

Chart comparing the height of waves in Alpena 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 Alpena in September

Alpena 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
Thunder Bay64.2°F55°F71.1°F
Ossineke64.4°F55.2°F71.4°F
Black River64.9°F55.8°F72°F
Harbor View63.1°F52.7°F70°F
Presque Isle Harbor63.1°F52.7°F70°F
Alcona65.1°F56.1°F71.8°F
Rogers City63°F54.1°F69.8°F
Manitou Beach63°F54.7°F69.6°F
Evergreen Beach63°F54.9°F69.4°F
Oscoda66.2°F57.9°F73°F

Michigan photo gallery

  • South end in the mouth of Lake Erie taken from Amherst Point Canada
  • Presque Isle sunset
  • Lake Michigan,  South Haven beach
  • Sunset at the Pier in New Buffalo

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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 Alpena 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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