September in Bremen averages a daily high of 19.7°C with nights around 9.8°C. Expect roughly 11.7 wet days totalling 56.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Bremen is May–September.
Based on BREMEN SEEFAHRTSCHULE, GM (3.3km), 1995–2024. 30 years of September data.