The highest day temperature in September 2026 was 94°F. The lowest night temperature was 87°F. The average values for day and night temperatures during September were 89.7°F и 88.5°F respectivly.

The average sea surface temperature in September 2026 for Port Aransas was 90.4°F. The maximum and minimum values were 89.4°F and 91.4°F respectively.

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

Precipitation total in September for Port Aransas is 0.9 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 11.3 mph. It makes September the most windless month of the year for Port Aransas.

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 Port Aransas in September is 7.5 hours.