August in Galveston averages a daily high of 32.9°C with nights around 27°C. Expect roughly 8.7 wet days totalling 126.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Galveston is March–May.
Based on GALVESTON SCHOLES FIELD, TX US (7.3km), 1995–2024. 27 years of August data.