World sea water temperatures

Water temperature in Acadia (ME) in September

Is it warm enough to swim in Acadia in September? Average water temperature in Acadia in September is 56.1°F and therefore is not suitable for comfortable swimming. The warmest sea in Acadia in September is 61.5°F, and the coldest is 52.7°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Acadia

Changes water temperature in Acadia in September 2025, 2024

To get an accurate forecast for the water temperature in Acadia for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Acadia, 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 157.7°F58.1°F54.1°F61.5°F
September 260.4°F58.5°F54°F60.6°F
September 360.1°F57.7°F52.7°F60.6°F
September 460.3°F57.9°F53.1°F60.3°F
September 558.6°F57.6°F53.6°F59.2°F
September 658.5°F57°F53.6°F59.7°F
September 757.9°F57°F54.1°F59.7°F
September 856.3°F57.4°F54.1°F59.9°F
September 956.3°F56.8°F54.1°F58.8°F
September 1056.1°F56.5°F54.3°F61.2°F
September 1156.1°F56.5°F54.5°F59.5°F
September 1256.7°F56.8°F53.8°F59°F
September 1356.1°F57°F53.8°F58.8°F
September 1457.2°F57.6°F54°F59.2°F
September 1557°F57.4°F53.8°F58.8°F
Day 2025 2024 Min Max
September 1656.7°F57.2°F53.2°F58.8°F
September 1757°F56.7°F53.1°F58.3°F
September 1858.3°F57°F53.2°F59.4°F
September 1958.1°F56.8°F53.6°F58.3°F
September 2056.7°F56.7°F53.6°F57.7°F
September 2156.3°F56.5°F54°F58.1°F
September 2256.8°F55.6°F53.6°F57.7°F
September 2356.3°F55.4°F53.4°F57.6°F
September 2455.8°F55°F53.6°F57.6°F
September 25 55.9°F53.2°F58.1°F
September 26 55.4°F53.4°F58.5°F
September 27 56.8°F53.1°F58.5°F
September 28 56.1°F53.2°F57.9°F
September 29 55.6°F53.8°F57.7°F
September 30 56.8°F53.4°F57.2°F
Acadia water temp chart in September

Average water temperature in Acadia in September over a decade

20152016201720182019
55.8°F56.8°F55°F57.2°F55.8°F
20202021202220232024
55.8°F58.1°F57.7°F57.2°F56.8°F

Acadia sea state in September

Chart comparing the height of waves in Acadia 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 Acadia in September

Acadia 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
Seal Harbor Beach56.1°F52.7°F61.5°F
Southwest Harbor56.3°F52.9°F61.9°F
Islesford56.1°F52.7°F61.7°F
Sand Beach56.1°F52.7°F61.9°F
Seawall56.1°F52.9°F61.9°F
Winter Harbor56.1°F52.9°F61.9°F
Lamoine56.7°F52.9°F64°F
Union River Bay57.4°F54°F63.3°F
Frenchboro56.5°F53.4°F62.4°F
Ellsworth57.7°F54°F64.2°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 Acadia 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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