World sea water temperatures

Water temperature in Monhegan (ME) in September

Is it warm enough to swim in Monhegan in September? Average water temperature in Monhegan in September is 59°F and therefore is not suitable for comfortable swimming. The warmest sea in Monhegan in September is 65.7°F, and the coldest is 54.9°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Monhegan

Changes water temperature in Monhegan in September 2025, 2024

To get an accurate forecast for the water temperature in Monhegan for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Monhegan, 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 160.8°F61.3°F58.6°F64.9°F
September 262.6°F60.6°F57.7°F63.7°F
September 362.4°F59.7°F57°F63.7°F
September 462.4°F60.4°F56.7°F63°F
September 5 61.3°F56.7°F63.9°F
September 6 61.2°F57.4°F64.6°F
September 7 60.8°F57.6°F65.5°F
September 8 61.2°F57.2°F65.5°F
September 9 59.4°F56.7°F65.7°F
September 10 58.6°F57.4°F65.5°F
September 11 58.3°F57.2°F64.6°F
September 12 59°F56.8°F63°F
September 13 59.4°F57°F65.3°F
September 14 59.7°F57°F64°F
September 15 59.5°F57°F61.9°F
Day 2025 2024 Min Max
September 16 60.3°F56.7°F61.5°F
September 17 59.9°F56.5°F61.2°F
September 18 58.6°F55.8°F62.8°F
September 19 58.3°F55°F62.2°F
September 20 58.1°F55.4°F62.2°F
September 21 57.9°F55.8°F62.1°F
September 22 57.7°F55.9°F62.1°F
September 23 58.3°F55.6°F62.4°F
September 24 59.4°F55°F62.4°F
September 25 58.5°F55°F62.2°F
September 26 58.1°F54.9°F62.2°F
September 27 57.4°F55.2°F62.1°F
September 28 56.8°F55.2°F61.3°F
September 29 56.3°F55.8°F61.2°F
September 30 56.7°F55.6°F60.4°F
Monhegan water temp chart in September

Average water temperature in Monhegan in September over a decade

20152016201720182019
58.8°F59.5°F57.9°F59.7°F58.3°F
20202021202220232024
59.4°F61°F59.5°F60.3°F59°F

Monhegan sea state in September

Chart comparing the height of waves in Monhegan 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 Monhegan in September

Monhegan 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
Christmas Cove59.5°F55.2°F66.6°F
Cushing58.6°F54.9°F65.5°F
Friendship59.2°F55.2°F66.6°F
Waldoboro59.2°F55.2°F66.6°F
Southport59.7°F55.4°F67.1°F
Saint George58.5°F54.9°F65.7°F
Boothbay Harbor59.7°F55.4°F67.3°F
Reid State Park59.9°F55.6°F66.9°F
Georgetown59.9°F55.6°F66.9°F
Popham Beach60.3°F55.8°F67.1°F

Maine photo gallery

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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 Monhegan 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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