World sea water temperatures

Water temperature in Cape May (NJ) in September

Is it warm enough to swim in Cape May in September? Average water temperature in Cape May in September is 72.5°F and therefore suitable for comfortable swimming. The warmest sea in Cape May in September is 79.7°F, and the coldest is 66.4°F. Average high air temperature in Cape May in September is 78°F, and average low temperature is 61°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Cape May

Changes water temperature in Cape May in September 2025, 2024

To get an accurate forecast for the water temperature in Cape May for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Cape May, 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 173°F71.6°F70.7°F78.3°F
September 272.5°F71.6°F70.9°F77°F
September 372.9°F72°F71.1°F76.8°F
September 473.4°F71.6°F71.4°F78.3°F
September 573.9°F71.1°F71.1°F78.6°F
September 673.8°F69.6°F69.6°F79.7°F
September 7 71.1°F71.1°F79.5°F
September 8 71.1°F71.1°F78.8°F
September 9 70.9°F70.9°F77°F
September 10 71.1°F71.1°F76.8°F
September 11 71.6°F70.9°F77°F
September 12 71.1°F69.1°F76.6°F
September 13 71.2°F69.8°F76.3°F
September 14 71.8°F70.3°F76.1°F
September 15 70.5°F70.2°F75.2°F
Day 2025 2024 Min Max
September 16 71.4°F68.4°F74.7°F
September 17 71.2°F67.1°F74.3°F
September 18 71.8°F67.1°F74.8°F
September 19 71.8°F67.3°F75.2°F
September 20 72.1°F67.8°F75°F
September 21 72°F68.2°F75.2°F
September 22 72°F68°F75°F
September 23 71.1°F67.5°F74.1°F
September 24 70.7°F66.9°F73.2°F
September 25 70.3°F66.7°F74.1°F
September 26 70.3°F66.6°F73.6°F
September 27 70.2°F66.7°F74.1°F
September 28 71.1°F66.6°F73.2°F
September 29 70.7°F66.7°F72.7°F
September 30 70.9°F66.4°F73°F
Cape May water temp chart in September

Average water temperature in Cape May in September over a decade

20152016201720182019
73.2°F73.2°F72.1°F75°F73°F
20202021202220232024
72.7°F72.9°F73.6°F73.4°F71.2°F

Cape May sea state in September

Chart comparing the height of waves in Cape May 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 Cape May in September

Weather and climate in Cape May in September

This data display average monthly climate indicators in Cape May 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 temperature78°F
  • Average LOW temperature61°F
  • Average rainfall days8 days
  • Average rainfall84mm/3.3''
  • Average daylight12h
  • Average sunshine8h
  • Average UV index7

Cape May 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
Diamond Beach72.5°F66.6°F79.7°F
Wildwood Crest72.5°F66°F80.1°F
Cape May Point72.7°F66.4°F79.9°F
Lower Township72.7°F66.2°F80.4°F
Stone Harbor72.5°F66.4°F79.9°F
Villas73°F66.2°F81.3°F
Avalon72.5°F66.4°F79.9°F
Cape Henlopen72.7°F66.4°F80.1°F
Sea Isle City72.5°F66.2°F79.9°F
Broadkill Beach72.9°F66.4°F80.6°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 Cape May 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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