World sea water temperatures

Water temperature in Edgartown (MA) in September

Is it warm enough to swim in Edgartown in September? Average water temperature in Edgartown in September is 67.8°F and therefore is not suitable for comfortable swimming. The warmest sea in Edgartown in September is 73.6°F, and the coldest is 61.9°F. Average high air temperature in Edgartown in September is 72°F, and average low temperature is 55°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Edgartown

Changes water temperature in Edgartown in September 2025, 2024

To get an accurate forecast for the water temperature in Edgartown for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Edgartown, 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 169.4°F69.3°F66.6°F73.4°F
September 269.1°F69.3°F66.6°F73.4°F
September 368.5°F69.6°F66.2°F73.6°F
September 468.7°F69.4°F66.6°F72.5°F
September 5 68.7°F66.2°F73°F
September 6 68.2°F65.7°F73.6°F
September 7 68°F65.5°F73.4°F
September 8 68.2°F66°F73°F
September 9 68.2°F66.4°F72.9°F
September 10 67.6°F66.2°F72.3°F
September 11 66.9°F66.2°F71.6°F
September 12 67.8°F66°F73.2°F
September 13 67.8°F64.8°F71.1°F
September 14 68.7°F65.1°F72.3°F
September 15 68.7°F64.4°F71.4°F
Day 2025 2024 Min Max
September 16 68.7°F65.3°F70.5°F
September 17 66.2°F64.8°F70.9°F
September 18 66.7°F64°F71.2°F
September 19 66.6°F63.9°F71.6°F
September 20 66.2°F64.4°F71.1°F
September 21 64.9°F64.2°F70.5°F
September 22 64.9°F63.5°F70.5°F
September 23 63°F63°F70.3°F
September 24 64°F63.5°F70.3°F
September 25 62.4°F62.4°F70°F
September 26 61.9°F61.9°F70°F
September 27 62.1°F62.1°F69.4°F
September 28 62.2°F62.2°F69.1°F
September 29 63.9°F63°F69.3°F
September 30 64.6°F63°F68.4°F
Edgartown water temp chart in September

Average water temperature in Edgartown in September over a decade

20152016201720182019
70°F69.3°F66.4°F70.2°F67.6°F
20202021202220232024
67.8°F70.9°F69.1°F68.4°F66.6°F

Edgartown sea state in September

Chart comparing the height of waves in Edgartown 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 Edgartown in September

Weather and climate in Edgartown in September

This data display average monthly climate indicators in Edgartown in September based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip

  • Average HIGH temperature72°F
  • Average LOW temperature55°F
  • Average rainfall days9 days
  • Average rainfall91mm/3.6''

Edgartown 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
Tisbury67.6°F62.1°F73.2°F
Oak Bluffs68.2°F62.8°F74.1°F
East Falmouth68.7°F62.8°F75.2°F
Menauhant Beach68.7°F62.8°F75.2°F
South Cape Beach68.7°F62.6°F75.4°F
South Beach66.7°F60.4°F72.1°F
Katama Beach66.7°F60.4°F72.1°F
Vineyard Haven68.5°F63°F74.8°F
New Seabury68.7°F62.6°F75.7°F
Surf Drive Beach68.5°F63°F74.8°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 Edgartown 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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