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Koh Samui Weather Forecast

Temperatures and forecasts
and satellite map

Click for Ko Samui, Thailand Forecast


The climate is very pleasant all year round, with temperatures varying between 25 and 34 degrees Celsius.

There are three seasons, warm and dry season from February till May, rainy season from the end of September till November and "cool" season which extends from October till January.

Rainy season often amounts in fact to some "refreshing"showers followed by the return of the sun.

The climate is tropical so very humid all year round, but Samui remains always refreshed by a pleasant sea breeze blowing from the Gulf.

In conclusion, if you love the sun and if you can withstand heights of summer, come from February till May! It is very rare that it rains...

Satellite Map

weather Koh Samui

weather Koh Samui

December to February (main season) it is up to 30C (86F). Short tropical rain, mostly in December. This is the best time of year for European 's to visit, because the the tempertaure is cooler.

March to June it becomes very hot, up to 40C (114F) in the sun and it rarely rains. (Low season)

July to September (main season) is hot, but some days its raining.

June, October, November are rainy seasons. But its not raining every day compared to other regions of Thailand. Samui does not really have a monsoon season. But sometimes there are sunless periods of 2 or 3 days.

Average Maxium Temperature C

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max Temp. 30 32 33 31 31 31 31 30 30 31 31 30
Min.Temp 22 23 24 25 25 25 24 24 24 24 24 23
Average Water Temperature
Water Temp. 25 26 26 27 27 28 28 28 28 26 27 26
Average Rain Fall
Rain mm 38 8 12 62 187 112 143 123 210 261 302 98

Overall Koh Samui weather is very good all year round, Only November being unpredictable, with most rain coming within this month.

See Wind

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