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Water temperature in Little Torch Key (FL) in September

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Is it warm enough to swim in Little Torch Key in September? Average water temperature in Little Torch Key in September is 85.8°F and therefore suitable for comfortable swimming. The warmest sea in Little Torch Key in September is 88.9°F, and the coldest is 82.8°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Little Torch Key

Changes water temperature in Little Torch Key in September 2025, 2024

To get an accurate forecast for the water temperature in Little Torch Key for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Little Torch Key, 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 187.8°F86.5°F84.2°F87.8°F
September 288°F86.5°F83.8°F88°F
September 387.8°F86.7°F83.8°F87.8°F
September 487.8°F86.7°F84°F87.8°F
September 5 86.5°F84.2°F88°F
September 6 86.7°F84.6°F87.8°F
September 7 87.3°F84.6°F87.4°F
September 8 87.1°F84.7°F87.8°F
September 9 86.9°F84.7°F87.3°F
September 10 87.6°F84°F87.6°F
September 11 87.3°F83.3°F88°F
September 12 88°F82.8°F88°F
September 13 88°F83.1°F88°F
September 14 88.7°F83.7°F88.7°F
September 15 88.3°F83.7°F88.3°F
Day 2025 2024 Min Max
September 16 88.9°F83.7°F88.9°F
September 17 88.7°F84°F88.7°F
September 18 88.3°F84°F88.3°F
September 19 88.2°F84°F88.2°F
September 20 87.6°F84°F87.6°F
September 21 88°F83.8°F88°F
September 22 88°F83.8°F88°F
September 23 87.4°F83.7°F87.4°F
September 24 87.6°F83.5°F87.6°F
September 25 86.9°F83.5°F87.3°F
September 26 86.4°F83.3°F86.7°F
September 27 85.6°F83.5°F86.7°F
September 28 86.4°F83.7°F86.4°F
September 29 85.8°F83.5°F86.4°F
September 30 84.9°F83.5°F86.4°F
Little Torch Key water temp chart in September

Average water temperature in Little Torch Key in September over a decade

20152016201720182019
86.2°F85.5°F85.6°F85.5°F85.3°F
20202021202220232024
86°F86°F86.9°F86.9°F87.3°F

Little Torch Key sea state in September

Chart comparing the height of waves in Little Torch Key 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 Little Torch Key in September

Little Torch Key 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
Sombrero Beach85.6°F82.9°F89.4°F
Marathon Key85.8°F82.9°F90.1°F
Cocoa Plum Beach85.8°F82.9°F89.2°F
Smathers Beach85.6°F82.9°F88.7°F
Grassy Key85.6°F82.9°F88.9°F
Duck Key85.6°F82.9°F88.7°F
Cape Sable85.8°F81.3°F89.8°F
Layton85.8°F82.9°F89.1°F
Long Key85.6°F82.9°F88.5°F
Fiesta Key85.6°F82.9°F88.9°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 Little Torch Key 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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