Whilst the ‘best’ time to visit Samui is generally known to be during the dry season (from mid-December through till April) it’s actually an all-year-round holiday spot. From halfway through September until the middle of December is the ‘rainy’ season, but as many travellers who disregard this warning find, it only rains for a short but heavy burst at about 3:00 pm before returning to being dry again. After this usually only hour-long downpour the air loses that thick humidity that’s associated with tropical countries and becomes fresher, which is why many see it as a plus-point.
Koh Samui’s seasons are broken down into three main categories: the dry season, the hot season and the rainy season. The dry goes from December to February, when the temperature will be a little but cooler so you don’t get that sweltering midday heat but it’s still wonderfully warm. It’s the most popular of the seasons and therefore busiest time of the year on Samui.
But if it is that sweltering heat that you’re after, then perhaps the hot season’s the time for you to go. During this period you’ll get that 30+-degree heat and a lot of fairly strong sunshine, with not so many clouds – so remember to wear sunscreen! The wettest time of the year is from September until November, but as mentioned earlier the rain tends only to fall for a small portion of the day, leaving the rest dry and sunny – albeit a little cloudier than other times of the year.