World sea water temperatures

Water temperature in South Beach (MA) in September

Is it warm enough to swim in South Beach in September? Average water temperature in South Beach in September is 66.7°F and therefore is not suitable for comfortable swimming. The warmest sea in South Beach in September is 72.1°F, and the coldest is 60.4°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in South Beach

Changes water temperature in South Beach in September 2025, 2024

To get an accurate forecast for the water temperature in South Beach for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in South Beach, 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 167.6°F66.9°F64.9°F71.2°F
September 267.3°F66°F66°F70.7°F
September 366.7°F67.1°F65.3°F70.7°F
September 466.9°F66.7°F65.1°F70.9°F
September 5 66.4°F65.3°F71.4°F
September 6 65.7°F65.7°F72.1°F
September 7 65.3°F65.3°F72.1°F
September 8 66.2°F66°F71.8°F
September 9 65.7°F65.7°F71.2°F
September 10 65.8°F65.8°F71.4°F
September 11 65.5°F65.5°F70.7°F
September 12 66.6°F65.3°F70.2°F
September 13 66.7°F64.4°F69.6°F
September 14 66.4°F64.8°F70.9°F
September 15 66.6°F64°F70.3°F
Day 2025 2024 Min Max
September 16 66.7°F64.9°F69.4°F
September 17 64.8°F63.9°F69.3°F
September 18 65.5°F63.7°F70.3°F
September 19 65.5°F63°F70.3°F
September 20 65.3°F63.9°F69.6°F
September 21 64.6°F63.9°F68.5°F
September 22 64.8°F63.1°F68.9°F
September 23 61.2°F61.2°F68.9°F
September 24 62.6°F62.4°F68.2°F
September 25 61.2°F61.2°F68°F
September 26 60.4°F60.4°F68.4°F
September 27 60.8°F60.8°F68.2°F
September 28 61°F61°F67.3°F
September 29 63.7°F62.8°F67.8°F
September 30 63°F62.8°F66.9°F
South Beach water temp chart in September

Average water temperature in South Beach in September over a decade

20152016201720182019
68.9°F68°F65.5°F68.9°F66.2°F
20202021202220232024
66.2°F68.9°F67.6°F66.6°F64.8°F

South Beach sea state in September

Chart comparing the height of waves in South Beach 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 South Beach in September

South Beach 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
Katama Beach66.7°F60.4°F72.1°F
West Tisbury66.7°F61°F71.8°F
Long Point Beach66.7°F61°F71.8°F
Tisbury67.6°F62.1°F73.2°F
Oak Bluffs68.2°F62.8°F74.1°F
Chilmark66.7°F61.9°F71.8°F
South Cape Beach68.7°F62.6°F75.4°F
New Seabury68.7°F62.6°F75.7°F
East Falmouth68.7°F62.8°F75.2°F
Menauhant Beach68.7°F62.8°F75.2°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 South Beach 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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