For this time of the year, Koh Samui is experiencing slightly cooler temperatures, gently falling below the seasonal average.
According to the long-range forecast, temperatures are expected to be 28.3 °C which is -1.2 °C lower than the historical average.
Select a month and click on a day for more information:
Thursday
Oct 1
29° / 28°
Friday
Oct 2
29° / 27°
Saturday
Oct 3
29° / 28°
Sunday
Oct 4
29° / 26°
Monday
Oct 5
29° / 26°
Tuesday
Oct 6
29° / 26°
Wednesday
Oct 7
29° / 25°
Thursday
Oct 8
28° / 25°
Friday
Oct 9
28° / 24°
Saturday
Oct 10
29° / 25°
Sunday
Oct 11
29° / 25°
Monday
Oct 12
29° / 25°
Tuesday
Oct 13
29° / 26°
Wednesday
Oct 14
29° / 25°
Thursday
Oct 15
28° / 25°
Friday
Oct 16
28° / 25°
Saturday
Oct 17
28° / 25°
Sunday
Oct 18
27° / 24°
Monday
Oct 19
27° / 24°
Tuesday
Oct 20
29° / 25°
Wednesday
Oct 21
28° / 25°
Thursday
Oct 22
29° / 25°
Friday
Oct 23
28° / 25°
Saturday
Oct 24
29° / 25°
Sunday
Oct 25
28° / 25°
Monday
Oct 26
29° / 25°
Tuesday
Oct 27
29° / 25°
Wednesday
Oct 28
29° / 25°
Thursday
Oct 29
27° / 24°
Friday
Oct 30
28° / 25°
Saturday
Oct 31
29° / 25°
Koh Samui 30 days weather forecast
Check out our estimated 30 days weather forecast for Koh Samui, this data is based on the average weather in Koh Samui in the last few years.
For a more accurate and detailed forecast, check out the 14 day weather for Koh Samui next to the desired date.