Weather at Samui Airport
Samui weather is warm and tropical throughout most of the year. Temperatures are almost constant year-round, with night-time lows around 25°C and day-time highs averaging around 33°C. The rainy season is rather short, lasting only from October to December, although there is some chance of rain throughout the year. Note that rains typically come in heavy late afternoon thunderstorms. Mornings can be clear and sunny. The dry season from January through to September is also the tourist high season, especially during the European vacation month of August.
Five-Day Weather Forecast for Samui
Weather information provided by Weather Underground.