The highest day temperature in September 2025 was 92°F. The lowest night temperature was 84°F. The average values for day and night temperatures during September were 88.5°F и 86.9°F respectivly.

The average sea surface temperature in September 2025 for South Padre Island was 90.0°F. The maximum and minimum values were 87.6°F and 91.6°F respectively.

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

Precipitation total in September for South Padre Island is 1.1 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 10.3 mph. It makes September the most windless month of the year for South Padre Island.

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 South Padre Island in September is 7.7 hours.