Ko Samui
Thailand
Long term weather forecast
Long term weather forecast

Monthly weather forecast and Climate
Ko Samui, Thailand

Wettest month (with highest rainfall) is November (506.6mm).
Driest month (with lowest rainfall) is February (54.4mm).

Best months for swimming (with highest average sea temperature) are April, May and June (30°C).
Coldest months (with lowest average sea temperature) are January, February and December (28°C).

Months with longest days are May, June and July (Average daylight: 13).
Months with shortest days are January, February, March, April, August, September, October, November and December (Average daylight: 12).

Month with most sunshine is February (Average sunshine: 9).
Months with least sunshine are May, June, July, August, September, October, November and December (Average sunshine: 6).

Months with highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
Month with lowest UV index is December (UV index 10).

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