Koh Samui has a tropical climate with three distinct seasons: dry, hot and rainy. Thailand is situated between the Tropic of Cancer and the Equator (slightly closer to the latter), a geographical position making its climate warm and humid all year round. The humidity level is generally between 70 and 85 per cent, and the temperatures average around 28°C.
Located in the Gulf of Thailand, Koh Samui offers all that vacationers from northern countries could dream of regarding weather conditions. They are generally good year round, and the one thing you will rarely feel is cold. The optimum weather conditions can be enjoyed between December and August.