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Samui Weather

Climate in Thailand

Thailand's climate is tropical and high in both temperature and humidity. Most people find it pleasant. The average temperature is about 30 degrees Celsius, or 86 degrees Fahrenheit.

When it is getting too hot, just enter a air conditioned hotel room or shop for a while and you will "recharge your batteries". A a dip in a pool can also be very refreshing.

Remember to drink a lot of water so you don't become dehydrated. You will experience "summer temperatures" here year round, but the weather in Koh Samui is normally divided into three seasons:

  The dry season

 The hot season

  Monsoon or Rainy season

  For daily reports about the weather, click here

The Weather Today

We offer daily live weather reports from Koh Samui and Koh Phangan. Just click on the link:

  The Koh Samui weather - Daily live reports

Please note: Most weather forecast websites do NOT offer accurate forecasts for this region. However, we are always reporting LIVE from Samui and Phangan.

Face towards the sun
AFTERNOON SUNSHINE - Photo by Jens W - Kohsamui.org

The Sun and Moon Data

Click for Ko Samui, Thailand Forecast

Differences in Climate

The climate seasons are not exactly the same as in Krabi and Phuket as these destinations are located in/at the Andaman Sea and Koh Samui, Koh Phangan and Koh Tao are located in the Gulf of Thailand. This makes the climate differences rather evident.

Irish young woman on Samui
YOUNG WOMAN ON SAMUI - Photo by Jens W - Kohsamui.org

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Koh Samui Weather Reports

Weather Seasons

The Dry Season

December - February

The dry season. Not much rain, but it might occur some refreshing wind or breeze at this time. Great for wind and body surfing. It is normally a lot of sunshine at this season.

The Hot Season

March - August

The weather is still dry in this time, and it is usually very sunny and hot. In May it might rain a little more though. This is a great period to visit the islands if you can stand temperatures ranging from 28-35 degrees Celsius at daytime.

The Rainy Season

September - November

Also known as the monsoon season. It's still hot and normally there are many sunny days in the monsoon period. On some days you might find yourself in a refreshing monsoon shower for a moment. The rain showers are often short and as these island's water supplies are finite, the rain is needed and important.

Sunset on Koh Samui
DAWN AT NORTH LAMAI - Photo by Jens W - Kohsamui.org

Samui Weather Statistics

Temperatures in Celsius. These are average values:

Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max. temp 31 32 33 33 31 31 31 31 30 31 31 31
Min. temp 23 23 24 25 25 25 25 24 24 24 24 24
Water temp 26 27 27 28 28 28 28 28 28 27 27 27
Sun hours 280 258 237 231 215 162 108 138 128 176 231 290
Rain mm 38 8 12 62 186 113 143 123 210 260 302 98

Sunset over Bang Por, Koh Samui
BANG POR SUNSET - Photo by Jens W - Kohsamui.org

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