May in Toamasina averages a daily high of 28.6°C with nights around 20°C. Expect roughly 21 wet days totalling 327.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Toamasina is May–November.
Based on TOAMASINA, MA (3.6km), 1995–2024. 26 years of May data.