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Water temperature in New Orleans (LA) in September

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Is it warm enough to swim in New Orleans in September? Average water temperature in New Orleans in September is 83.5°F and therefore suitable for comfortable swimming. The warmest sea in New Orleans in September is 88.2°F, and the coldest is 77.2°F. Average high air temperature in New Orleans in September is 88°F, and average low temperature is 72°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in New Orleans

Changes water temperature in New Orleans in September 2025, 2024

To get an accurate forecast for the water temperature in New Orleans for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in New Orleans, 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 186°F84.2°F82°F87.8°F
September 284.6°F83.7°F81.1°F87.1°F
September 384.2°F84.6°F81.1°F87.1°F
September 484.7°F85.3°F81.3°F87.1°F
September 585.3°F85.1°F82°F86.7°F
September 6 85.1°F80.2°F87.1°F
September 7 84.7°F79.9°F87.1°F
September 8 84.6°F78.1°F87.3°F
September 9 84.4°F78.4°F87.8°F
September 10 84.2°F78.6°F87.6°F
September 11 84.2°F79.2°F87.1°F
September 12 82.6°F79.2°F87.6°F
September 13 82.2°F78.3°F87.3°F
September 14 81.9°F77.9°F88.2°F
September 15 82.8°F79.3°F87.6°F
Day 2025 2024 Min Max
September 16 83.1°F80.2°F87.6°F
September 17 84°F80.8°F88.2°F
September 18 84.4°F79.9°F88.2°F
September 19 84.2°F79.9°F87.6°F
September 20 84.7°F80.8°F87.4°F
September 21 84.9°F80.2°F87.4°F
September 22 85.1°F79.5°F87.1°F
September 23 84.4°F79.5°F86.9°F
September 24 85.3°F77.2°F86°F
September 25 84.7°F77.2°F86°F
September 26 83.3°F77.9°F86.2°F
September 27 83.3°F77.4°F86°F
September 28 81.5°F77.4°F86.4°F
September 29 81.7°F77.4°F85.6°F
September 30 81.7°F78.6°F84.4°F
New Orleans water temp chart in September

Average water temperature in New Orleans in September over a decade

20152016201720182019
82.6°F84.7°F82.2°F85.1°F85.1°F
20202021202220232024
83.3°F81.3°F84.6°F85.8°F83.8°F

New Orleans sea state in September

Chart comparing the height of waves in New Orleans 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 New Orleans in September

Weather and climate in New Orleans in September

This data display average monthly climate indicators in New Orleans 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 temperature88°F
  • Average LOW temperature72°F
  • Average humidity
    78
  • Average rainfall days9 days
  • Average rainfall127mm/5''
  • Average daylight12h
  • Average sunshine7.6h
  • Average UV index9

New Orleans 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
Boothville83.3°F76.8°F87.6°F
Venice83.5°F77.4°F87.4°F
Chandeleur Islands83.8°F78.3°F87.6°F
Buras83.8°F77.7°F88.2°F
Shell Beach83.1°F76.8°F88.2°F
Gulfport83.1°F76.1°F87.8°F
Bay Saint Louis82.9°F76.5°F88.2°F
Waveland82.9°F76.6°F88.2°F
Grand Isle84°F77.9°F88.5°F
Ocean Springs83.1°F77.2°F87.8°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 New Orleans 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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