October in Brest averages a daily high of 12.9°C with nights around 5°C. Expect roughly 10.6 wet days totalling 36mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Brest is May–September.
Based on BREST, BO (2.5km), 1995–2024. 12 years of October data.