September in Lorient averages a daily high of 20.2°C with nights around 14.2°C. Expect roughly 9.3 wet days totalling 42.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Lorient is June–September.
Based on BELLE ILE LE TALUT, FR (51.8km), 1995–2024. 30 years of September data.