World sea water temperatures

Water temperature in Cedar Beach in September

Is it warm enough to swim in Cedar Beach in September? Average water temperature in Cedar Beach in September is 70.5°F and therefore suitable for comfortable swimming. The warmest sea in Cedar Beach in September is 77.2°F, and the coldest is 64.6°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Cedar Beach

Changes water temperature in Cedar Beach in September 2025, 2024

To get an accurate forecast for the water temperature in Cedar 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 Cedar 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 171.2°F72.1°F69.3°F75.4°F
September 270.9°F72°F68.9°F75.2°F
September 370.9°F70.2°F68.5°F75.6°F
September 471.4°F69.8°F68.4°F75.2°F
September 5 70.2°F68.9°F77.2°F
September 6 69.6°F69.1°F76.6°F
September 7 70.2°F69.3°F76.3°F
September 8 69.8°F69.1°F77°F
September 9 69.6°F68.9°F76.6°F
September 10 70.2°F68.7°F75.6°F
September 11 69.8°F68.2°F75.9°F
September 12 70.3°F68.4°F75.2°F
September 13 70.5°F68.2°F74.1°F
September 14 70.9°F68.4°F74.7°F
September 15 70.9°F68.2°F73.6°F
Day 2025 2024 Min Max
September 16 70.3°F68°F73.2°F
September 17 70.9°F66.7°F73°F
September 18 70.5°F66.7°F73.4°F
September 19 70.5°F65.7°F72.7°F
September 20 70°F66°F72.3°F
September 21 69.4°F66.2°F72.3°F
September 22 69.8°F66.7°F72.3°F
September 23 69.1°F66.4°F72.3°F
September 24 69.1°F65.8°F71.6°F
September 25 68.2°F65.5°F71.1°F
September 26 68°F65.5°F71.1°F
September 27 67.6°F65.3°F70.5°F
September 28 67.6°F65.7°F69.8°F
September 29 65.8°F65.1°F70.5°F
September 30 67.3°F64.6°F71.6°F
Cedar Beach water temp chart in September

Average water temperature in Cedar Beach in September over a decade

20152016201720182019
71.8°F71.6°F69.1°F72.3°F70.3°F
20202021202220232024
71.4°F71.6°F71.2°F70.7°F69.6°F

Cedar Beach sea state in September

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

Cedar 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
New York City71.1°F64.8°F78.1°F
Oak Beach70.3°F64.2°F77°F
Amityville70.7°F64.2°F78.6°F
Saltaire70.2°F63.9°F76.6°F
Islip70.9°F62.2°F80.1°F
Great River70.7°F61.9°F80.4°F
Fire Island70.2°F63.9°F76.3°F
West Sayville70.7°F62.1°F79.7°F
Baldwin Harbor70.9°F64.4°F76.8°F
Point Lookout70.9°F64.4°F76.8°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 Cedar 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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