May in Phuket averages a daily high of 33.1°C with nights around 26.2°C. Expect roughly 20.5 wet days totalling 243.2mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Phuket is January–February.
Based on PHUKET, TH (0.9km), 1995–2024. 19 years of May data.