Galveston, Texas weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Good
Best time to visit: May – October
What is the weather like in Galveston, Texas in August?
In August, Galveston, Texas is hot: daytime highs average 31 °C, and even at night it stays warm at around 27 °C. The sea averages 30.2 °C – almost as warm as a bath. The sun shines for around 8 hours a day. It rains often – on about 15 days, adding up to 113 mm. On about 21 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is a good month for a holiday in Galveston, Texas.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 81 | 79 | 78 |
| Day | 30° | 31° | 29° |
| Night | 27° | 27° | 25° |
| Sea | 30° | 30° | 29° |
| Sun | 8 h | 8 h | 6 h |
| Rain days | 15 | 15 | 13 |
More details for August
- Daylight
- 13 h 14 min06:47 – 20:01
- UV index
- 11 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 16 km/haverage daily peakAll months
- Cloud cover
- 53 %on averageAll months
- Hot days
- 21 days30 °C or moreAll months
- Time zone
- UTC−5America/Chicago
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %77 %
- Few rainy daysweight 20 %20 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in August
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Galveston, Texas in August: quick answers
Is Galveston, Texas hot in August?
Yes. In August, Galveston, Texas is hot: daytime highs average 31 °C and nights stay around 27 °C. On about 21 days the thermometer climbs to 30 °C or more.
Can you swim in Galveston, Texas in August?
Yes. In August the sea averages 30.2 °C – almost as warm as a bath.
Does it rain much in Galveston, Texas in August?
It rains often – on about 15 days, adding up to 113 mm.
Galveston, Texas month by month
The whole year in Galveston, TexasAll destinations: USAWhere to go in AugustSea temperature in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences