World sea water temperatures

Water temperature in Flanders in September

Is it warm enough to swim in Flanders in September? Average water temperature in Flanders in September is 70.2°F and therefore suitable for comfortable swimming. The warmest sea in Flanders in September is 77°F, and the coldest is 65.5°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Flanders

Changes water temperature in Flanders in September 2025, 2024

To get an accurate forecast for the water temperature in Flanders for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Flanders, 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 170.2°F71.8°F69.6°F75.2°F
September 269.8°F72.7°F69.4°F74.7°F
September 369.6°F71.1°F68.5°F74.1°F
September 470.9°F70.9°F68.5°F75°F
September 5 71.1°F68.7°F76.1°F
September 6 71.1°F68.9°F76.6°F
September 7 71.1°F69.4°F75.9°F
September 8 70.7°F69.3°F75.4°F
September 9 69.6°F69.1°F75.6°F
September 10 69.6°F68.7°F75.6°F
September 11 69.8°F68.4°F76.1°F
September 12 69.8°F67.8°F76.1°F
September 13 70.2°F68°F77°F
September 14 70°F68.2°F76.6°F
September 15 71.6°F68°F75.4°F
Day 2025 2024 Min Max
September 16 70.9°F67.8°F72.3°F
September 17 70.2°F66.7°F72.1°F
September 18 69.6°F66.7°F72.7°F
September 19 70.9°F65.7°F72.7°F
September 20 70.7°F66°F72.3°F
September 21 70°F66.2°F72°F
September 22 68.5°F66.4°F72.5°F
September 23 68°F66.2°F72.5°F
September 24 67.6°F66.2°F71.6°F
September 25 67.1°F66.2°F72°F
September 26 66.9°F66.2°F72.5°F
September 27 66.7°F65.5°F70.9°F
September 28 66.6°F65.8°F70°F
September 29 66.4°F65.7°F69.6°F
September 30 66.7°F65.5°F69.4°F
Flanders water temp chart in September

Average water temperature in Flanders in September over a decade

20152016201720182019
71.6°F71.8°F68.9°F72°F70.2°F
20202021202220232024
70.7°F72.1°F71.2°F71.2°F69.6°F

Flanders sea state in September

Chart comparing the height of waves in Flanders 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 Flanders in September

Flanders 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
Mattituck70.9°F66.2°F78.3°F
New Suffolk70.2°F64.9°F76.6°F
Shinnecock Hills69.3°F64.6°F75.4°F
Meschutt Beach69.3°F64.6°F75.4°F
Breakwater Beach70.7°F65.8°F77.9°F
The Hamptons69.3°F64.4°F74.8°F
Hampton Bays69.3°F64.4°F74.8°F
Ponquogue Beach69.3°F64.4°F74.8°F
West Hampton Dunes69.4°F64.4°F75°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 Flanders 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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