The highest day temperature in August 2026 was 101°F. The lowest night temperature was 82°F. The average values for day and night temperatures during August were 95.6°F и 84.2°F respectivly.

The average sea surface temperature in August 2026 for Galveston Island was 91.3°F. The maximum and minimum values were 89.8°F and 92.2°F respectively.

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

Precipitation total in August for Galveston Island is 1.0 in.

The average wind speed in August is 8.7 mph. It makes August one of the most windless months of the year for Galveston 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 Galveston Island in August is 8.8 hours.