Southeast Asia · Beach travel
Best time to visit Koh Samui
Mid Jan–Mid Mar is the best time to visit. During this period, the average daytime high is 29.6°C, with 2.1 rainy days per 10 days.
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Season calendar
AvoidOff-seasonFairOkayGoodGreatBest
Japan MOFA travel advice
No Japan MOFA travel advisory is in effect for this destination.
Climate and season score by month
| Month | Level | Daytime high | Rainy days (per 10 days) | Cloud cover |
|---|---|---|---|---|
| January | Best | 29.1°C | 3.2 | 63.8% |
| February | Best | 29.5°C | 2.3 | 51.3% |
| March | Great | 30.6°C | 1.7 | 49.4% |
| April | Fair | 32.0°C | 2.7 | 63.7% |
| May | Avoid | 33.0°C | 4.7 | 84.3% |
| June | Avoid | 33.1°C | 4.0 | 87.2% |
| July | Off-season | 32.6°C | 4.4 | 87.5% |
| August | Off-season | 32.8°C | 3.8 | 86.4% |
| September | Off-season | 32.1°C | 4.4 | 88.5% |
| October | Off-season | 31.0°C | 5.6 | 86.5% |
| November | Fair | 29.9°C | 6.2 | 82.3% |
| December | Good | 29.5°C | 4.5 | 76.3% |
How the score works
The season score is a relative 0–100 measure of how suitable each time of year is for travel at this destination, grouped into seven levels. It combines climate-normal trends in temperature, rain, cloud cover, and other conditions.
Weather station: KO SAMUI（6 km）. Data: NASA POWER, NOAA GHCN-Daily, OISST, IBTrACS, and Natural Earth.
These are historical climate-normal trends, not a weather forecast.