World sea water temperatures

Water temperature in Osterville in September

Is it warm enough to swim in Osterville in September? Average water temperature in Osterville in September is 68.9°F and therefore suitable for comfortable swimming. The warmest sea in Osterville in September is 76.8°F, and the coldest is 62.6°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Osterville

Changes water temperature in Osterville in September 2025, 2024

To get an accurate forecast for the water temperature in Osterville for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Osterville, 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 171.8°F73°F66.7°F76.3°F
September 271.2°F73.4°F66.9°F75.4°F
September 371.4°F72.5°F66.4°F75.9°F
September 471.8°F72.1°F66.7°F75.7°F
September 572.3°F72.3°F66.2°F75.9°F
September 672.3°F72.1°F65.7°F75.9°F
September 771.4°F72.3°F65.5°F75.4°F
September 870.7°F72.1°F65.8°F75.6°F
September 970.2°F70.7°F66.4°F75°F
September 1069.4°F70.5°F66.2°F75°F
September 1168.2°F69.4°F66.4°F74.5°F
September 1268.7°F69.6°F66°F75.7°F
September 1369.1°F71.1°F65.1°F76.3°F
September 1469.8°F70.3°F65.3°F76.8°F
September 1570.2°F71.1°F64.8°F74.3°F
Day 2025 2024 Min Max
September 1670°F70.7°F65.7°F72.3°F
September 1770°F70.3°F64.9°F72.1°F
September 1869.1°F70°F64.4°F73.4°F
September 1968.9°F69.4°F64.4°F73.2°F
September 2068.9°F67.6°F64.6°F72°F
September 2168.9°F64.9°F63.7°F71.6°F
September 2268.2°F63.9°F63°F71.8°F
September 2368.2°F63.9°F63°F72°F
September 2468.2°F64.4°F63.9°F72.9°F
September 25 64.2°F63.5°F72.3°F
September 26 63.9°F63°F72.7°F
September 27 64°F62.6°F72.1°F
September 28 64.4°F62.6°F71.6°F
September 29 64.4°F62.8°F71.1°F
September 30 65.3°F62.8°F69.6°F
Osterville water temp chart in September

Average water temperature in Osterville in September over a decade

20152016201720182019
71.2°F70.3°F66.9°F71.6°F69.8°F
20202021202220232024
69.3°F72.9°F71.2°F70.9°F68.7°F

Osterville sea state in September

Chart comparing the height of waves in Osterville 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 Osterville in September

Osterville 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
Mashpee68.9°F62.6°F76.1°F
Popponesset68.9°F62.6°F76.1°F
Craigville Beach68.7°F62.1°F77°F
Centerville68.7°F62.1°F77°F
Dowses Beach68.7°F62.1°F77°F
Covell's Beach68.7°F62.1°F77°F
New Seabury68.7°F62.6°F75.7°F
South Cape Beach68.7°F62.6°F75.4°F
Hyannis68.4°F61.7°F77°F
Kalmus Beach68.4°F61.7°F77°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 Osterville 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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