Blue Sky Over Samui - Koh Samui Weather
Blue Sky over Koh Samui

Koh Samui Weather – the most frequently asked question to us, is, what is the weather going to be like, of course it is a major factor when booking ones holiday anywhere. Coming to Thailand it is just as important, and like anywhere, Thailand does have its fair share of different weather patterns and like everywhere else, there are seasons too.

When I first came to Thailand, the first thing I was told regarding the weather here is that, Thailand actually has three seasons and not the conventional seasons we may know in the West, but seasons none the less. These three seasons were described to me like this; the firsts season is hot, the second season is hotter and the third season is ‘Oh My God.’

Not the most up-to-date or descriptive weather report I had heard but the funniest, definitely.

Koh Samui is one of Thailand’s top travel destinations, the island the third biggest in the country, and is well known for water sports, adventure activities, shopping, great cuisine and some fantastic sightseeing adventures. The weather on the island is always warm and usually sunny for most of the year. The busiest time of the year is between December and March; also the months of July and August are also very busy.

Koh Samui is the largest island in the archipelago which includes the other islands of Koh Phangan and Koh Tao, as well as the wonderful National Marine Park of Angthong, all of which can be easily reached by boat.

At most times of the year visitors will enjoy kind weather on Samui and the surrounding coastal areas. During the high season (December to February), temperatures on Samui are usually quite consistent typically being around 30°C. The seas are again usually calm with only moderates swells and light breezes. It is possible to encounter some downpours December never really lasting long.

MonthJanuaryFebruaryMarchAprilMayJuneJulyAugust SeptemberOctoberNovemberDecember
Max Temp313132333433323130313030
Min Temp222324252525252424242424
Water temp2727 28282929 282928272728
Sunshine Average Daily Hours889777788777
Rain in mm's2810126218011314312321026030298

Between the months of March and June the weather can get hot, very hot it is not unusual for the temperatures to hit highs of 40C°. There is very little if any rain what-so-ever during these months and sometimes this can be a problem with water supplies on the Island. The sea is still generally calm, and the low tides can lead very low tidal movements exposing much of the beaches. The weather changes again come May, when the winds start to get stronger usually in the late in the afternoon; this is also a great time to watch some fantastic thunder storms.

The weather on Samui between July and September is a little cooler, with the monsoon season that brings occasional thunder storms and at times heavy rain. These are also popular months for visitors as is the summer holiday in the western world, and Koh Samui can who can guarantee lots of sunshine during their holiday.

During October and November there is more rain than the other months, although even then, it doesn’t normally rain all day and every day. Koh Samui is unlike many other parts of the country, as it does not have a prolonged or foreseeable rainy season. Even during the wettest times of the year, there is rarely more for than two or three days without sun, even during November; which is commonly considered to be the wettest month.

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