August in Brest averages a daily high of 24.9°C with nights around 13.3°C. Expect roughly 9.8 wet days totalling 73.9mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Brest is May–September.
Based on BREST, BO (2.5km), 1995–2024. 20 years of August data.