Your Travel Guide to Thailand
All information & tips to prepare your trip in Thailand
What is the weather like in Koh Samui?
About the climate in Koh Samui
Koh Samui has a tropical savanna climate. The island has only one month of true dry season (February). The climate is hot and humid for most of the year but the island is on average less humid than Phuket. The rainiest months are October and especially November. The rest of the year, given the tropical climate, showers are brief.The best mome,nt to come to Koh Samui is from January to April but Samui is also enjoyable during the months of July and August. At this time of the year Koh Samui, Koh Phangan and Koh Tao are the islands of Thailand where the weather is the best. The months of October and especially November (sometimes until mid-December) are not recommended for a stay in Ko Samui.
Current weather in Koh Samui and forecast
Average temperatures in Koh Samui
Average high / low temperatures in °C (source: TMD)
Average rainfall in Koh Samui
Average rainfall in millimeters (source: TMD)
*These charts were compiled with temperature and rainfall data from the Thai Meteorological Department (TMD). They show trends to help you plan your trip to Thailand, but they are not weather forecasts.
General information about weather in Thailand
You will find weather information for the whole of Thailand, including month-by-month average rainfall maps, on the Weather in Thailand page.
