May in Bremerhaven averages a daily high of 17°C with nights around 9.6°C. Expect roughly 12.8 wet days totalling 51.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Bremerhaven is May–September.
Based on BREMERHAVEN, GM (2.1km), 1995–2024. 30 years of May data.