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Water temperature in Atlantic Beach (Long Island) in September

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Is it warm enough to swim in Atlantic Beach in September? Average water temperature in Atlantic Beach in September is 70.9°F and therefore suitable for comfortable swimming. The warmest sea in Atlantic Beach in September is 77.2°F, and the coldest is 65.1°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Atlantic Beach

Changes water temperature in Atlantic Beach in September 2025, 2024

To get an accurate forecast for the water temperature in Atlantic 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 Atlantic 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 171.4°F72.7°F70.5°F76.3°F
September 271.4°F72.1°F70.2°F76.1°F
September 370.9°F71.2°F69.4°F75.9°F
September 471.2°F70.9°F69.3°F75.9°F
September 5 71.2°F69.6°F77°F
September 6 70.5°F70°F77.2°F
September 7 70.5°F70°F76.6°F
September 8 70.7°F69.8°F75.9°F
September 9 70.2°F69.6°F75.6°F
September 10 70.2°F69.3°F75.7°F
September 11 70°F68.9°F75.7°F
September 12 70.2°F68.9°F75.2°F
September 13 70.5°F68.4°F75.7°F
September 14 70.9°F68.5°F74.5°F
September 15 71.2°F68.5°F72.9°F
Day 2025 2024 Min Max
September 16 70.5°F68.2°F72.9°F
September 17 70.5°F67.1°F73°F
September 18 70.3°F67.1°F73.2°F
September 19 70.9°F66.2°F73.2°F
September 20 70.9°F66.6°F72.9°F
September 21 70.9°F66.6°F72.3°F
September 22 70.7°F66.6°F72.7°F
September 23 70.2°F66°F72.5°F
September 24 69.8°F65.8°F72.1°F
September 25 71.2°F65.8°F72°F
September 26 71.1°F66°F72°F
September 27 70.3°F65.8°F71.4°F
September 28 69.8°F65.7°F71.2°F
September 29 69.4°F65.3°F70.5°F
September 30 68.9°F65.1°F69.8°F
Atlantic Beach water temp chart in September

Average water temperature in Atlantic Beach in September over a decade

20152016201720182019
72.7°F72.3°F70°F72.9°F70.5°F
20202021202220232024
71.4°F71.4°F72°F70.9°F70.5°F

Atlantic Beach sea state in September

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

Atlantic 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
Rockaway Park70.9°F65.3°F77.4°F
Belle Harbor70.9°F65.3°F77.4°F
Baldwin Harbor70.9°F64.4°F76.8°F
Jones Inlet70.7°F64.9°F76.8°F
East New York70.9°F65.1°F77.2°F
Jacob Riis Park70.9°F65.3°F77.4°F
Fort Tilden70.9°F65.3°F77.4°F
Manhattan Beach70.9°F64.9°F77.4°F
Brighton Beach70.9°F64.9°F77.4°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 Atlantic 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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