May in Karlskrona averages a daily high of 15.4°C with nights around 9°C. Expect roughly 9.5 wet days totalling 28.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Karlskrona is June–September.
Based on KARLSKRONA SODERSTJ., SW (1.3km), 1995–2024. 15 years of May data.