The highest day temperature in September 2026 was 99°F. The lowest night temperature was 68°F. The average values for day and night temperatures during September were 92.5°F и 77.8°F respectivly.

The average sea surface temperature in September 2026 for Fort Walton Beach was 89.7°F. The maximum and minimum values were 87.0°F and 91.0°F respectively.

Most of the days in September are sunny but you can also expect cloudy and gloomy days.

Precipitation total in September for Fort Walton Beach is 7.1 in. It makes september the most rainy month of the year.

The average wind speed in September is 7.2 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Fort Walton Beach in September is 7.7 hours.