Weather in Galveston Island: August
 |
Average day temperature: | 89.2°F |
| Average night temperature: | 81.8°F | |
 |
Sea water temperature: | 87.5°F |
 |
Number of sunny days: | 13 days |
| Day length: | 12.8 - 13.5 hours | |
 |
Number of rainy days: | 2 days |
| Precipitation totals: | 1.0 in. | |
| more information | ||
forecast
| Galveston Island |
temperature
| Galveston Island |
Air temperature in August, °F
The highest day temperature during August of 2025 was 91°F. At the same time the lowest night temperature was 81°F. Daily and nightly averages during August were 87.5°F and 84.4°F.
Sea water temperature in Galveston Island in August, °F
The average sea water temperature in August of 2025 was 87.8°F. The highest and lowest sea temperatures during the month were 89.1°F and 86.4°F.
Mostly all days in August are sunny but cloudy days are also possible.
Precipitation total in August, in.
Precipitation total value in Galveston Island in August is 1.0 in. Other months of the year show relatively similar values.
The average wind speed value in August is 8.2 mph It makes August lest windy month of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in August is: 8.4.
Best time for vacation in Galveston Island
Galveston Island on a weather map
17 mph
15 mph
16 mph
14 mph
7 mph
2 mph
6 mph
6 mph
