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Water temperature in Saint Augustine South (FL) in September

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Is it warm enough to swim in Saint Augustine South in September? Average water temperature in Saint Augustine South in September is 82.6°F and therefore suitable for comfortable swimming. The warmest sea in Saint Augustine South in September is 85.5°F, and the coldest is 78.6°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Saint Augustine South

Changes water temperature in Saint Augustine South in September 2025, 2024

To get an accurate forecast for the water temperature in Saint Augustine South for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Saint Augustine South, 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 184.6°F85.5°F81°F85.5°F
September 284.4°F85.1°F79.7°F85.1°F
September 383.7°F84.2°F80.4°F84.7°F
September 482.6°F83.8°F80.4°F84.9°F
September 582.4°F83.8°F80.2°F85.3°F
September 682.4°F83.7°F80.4°F85.3°F
September 783.3°F83.5°F81°F84.9°F
September 883.7°F83.3°F81.5°F84.7°F
September 983.5°F83.3°F81.7°F84.6°F
September 1082°F83.1°F81.1°F84.7°F
September 1181.7°F82.9°F81°F84.7°F
September 1281.1°F82.8°F80.6°F84.7°F
September 1380.4°F82°F80.4°F84.6°F
September 1479.9°F81.9°F79.9°F85.1°F
September 1579°F81.5°F79°F85.1°F
Day 2025 2024 Min Max
September 1678.8°F81.5°F78.8°F85.3°F
September 1778.8°F81.5°F78.8°F85.1°F
September 1879.2°F80.6°F79.2°F84.2°F
September 1979.9°F81.5°F79.9°F84°F
September 2080.6°F81.7°F80.6°F84.2°F
September 2181°F82.2°F80.8°F84.2°F
September 2281.1°F81.9°F80.6°F84.4°F
September 2381.7°F81.7°F80.4°F84°F
September 2482.8°F82.2°F80.1°F84°F
September 2582.8°F82°F79.2°F84.2°F
September 26 81.9°F78.6°F84.2°F
September 27 82.6°F78.6°F85.5°F
September 28 81.7°F78.8°F84.7°F
September 29 81.9°F79°F84.4°F
September 30 81.9°F79°F84.2°F
Saint Augustine South water temp chart in September

Average water temperature in Saint Augustine South in September over a decade

20152016201720182019
82°F82.8°F82.4°F84°F82.4°F
20202021202220232024
83.5°F81.7°F83.3°F83.3°F82.6°F

Saint Augustine South sea state in September

Chart comparing the height of waves in Saint Augustine South 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 Saint Augustine South in September

Saint Augustine South 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

Best Beach Resorts in Florida in September

Places with the warmest average sea water temperature in Florida in September. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Sarasota85.5°F81.3°F88.2°F
Key West85.6°F82.9°F88.7°F
Naples85.8°F82°F89.2°F
Miami Beach85.5°F83.1°F89.1°F
Fort Myers Beach85.6°F81.7°F88.5°F
Destin83.8°F79.3°F87.8°F
Fort Lauderdale85.3°F83.1°F88.3°F
Key Largo85.6°F82.4°F88.3°F
Cocoa Beach83.5°F80.6°F86.4°F
Clearwater Beach84.9°F80.8°F88°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 Saint Augustine South 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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