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Water temperature in Harpswell Center (ME) in September

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Is it warm enough to swim in Harpswell Center in September? Average water temperature in Harpswell Center in September is 60.6°F and therefore is not suitable for comfortable swimming. The warmest sea in Harpswell Center in September is 67.5°F, and the coldest is 56.1°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Harpswell Center

Changes water temperature in Harpswell Center in September 2025, 2024

To get an accurate forecast for the water temperature in Harpswell Center for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Harpswell Center, 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 162.6°F64.4°F59.9°F66.2°F
September 263.7°F63.7°F59.2°F65.5°F
September 364.2°F62.8°F58.5°F65.8°F
September 464.2°F62.4°F57.9°F65.8°F
September 5 62.1°F58.1°F67.5°F
September 6 62.2°F58.3°F66.9°F
September 7 62.4°F58.5°F67.5°F
September 8 61.5°F58.1°F66.4°F
September 9 60.8°F58.3°F67.1°F
September 10 60.4°F58.3°F67.5°F
September 11 59.7°F58.3°F66.6°F
September 12 60.3°F57.7°F65.1°F
September 13 61.3°F57.6°F64.9°F
September 14 61.2°F57.7°F66.4°F
September 15 61.5°F57.2°F65.3°F
Day 2025 2024 Min Max
September 16 62.1°F57.2°F63.9°F
September 17 62.2°F57.2°F63.5°F
September 18 61.2°F57°F63.1°F
September 19 60.8°F57°F63.5°F
September 20 60.8°F56.5°F62.4°F
September 21 60.3°F56.1°F63.7°F
September 22 60.8°F56.5°F63.3°F
September 23 60.4°F56.8°F63.9°F
September 24 60.6°F56.7°F63.7°F
September 25 59.9°F56.5°F63.1°F
September 26 59.4°F56.3°F65.1°F
September 27 61°F56.7°F64.4°F
September 28 60.1°F56.8°F63.3°F
September 29 60.4°F57.2°F63°F
September 30 60.6°F57.2°F61.7°F
Harpswell Center water temp chart in September

Average water temperature in Harpswell Center in September over a decade

20152016201720182019
61°F61.3°F59.4°F62.4°F61°F
20202021202220232024
59.9°F63.3°F61.2°F62.4°F61.2°F

Harpswell Center sea state in September

Chart comparing the height of waves in Harpswell Center 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 Harpswell Center in September

Harpswell Center 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
Freeport60.6°F56.1°F67.5°F
Bailey Island60.6°F56.3°F67.5°F
Yarmouth60.6°F56.3°F68.2°F
Casco Bay60.6°F56.5°F67.5°F
Phippsburg60.1°F55.8°F67.6°F
Woolwich59.9°F55.4°F68.5°F
Peaks Island60.8°F56.7°F67.5°F
Popham Beach60.3°F55.8°F67.1°F
Portland60.8°F56.3°F67.5°F
Reid State Park59.9°F55.6°F66.9°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 Harpswell Center 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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