May in Sousse averages a daily high of 30°C with nights around 15.8°C. Expect roughly 4.8 wet days totalling 22.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Sousse is October–April.
Based on KAIROUAN, TS (51.4km), 1995–2024. 18 years of May data.