Best Time to Visit Ko Samui: Month-by-Month Guide
Best months for Ko Samui: February, March.
- Best months for Ko Samui: February, March.
- Peak season is February, March, January. Expect higher prices and more visitors (estimated from the climate, not from visitor counts).
- Shoulder season: April, December. Good weather without the busiest period.
- Wettest months: October, September, May.
- The least pleasant month is May (score 6.0).
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 27°C | 26°C | 73 mm | 10 | – | – | 7.8 |
| February | 27°C | 26°C | 36 mm | 5 | – | – | 8.4 |
| March | 28°C | 27°C | 89 mm | 9 | – | – | 7.9 |
| April | 29°C | 27°C | 96 mm | 12 | – | – | 7.4 |
| May | 29°C | 27°C | 115 mm | 21 | – | – | 6.0 |
| June | 29°C | 27°C | 89 mm | 19 | – | – | 6.4 |
| July | 29°C | 27°C | 84 mm | 19 | – | – | 6.6 |
| August | 29°C | 27°C | 92 mm | 18 | – | – | 6.6 |
| September | 28°C | 26°C | 141 mm | 23 | – | – | 6.1 |
| October | 28°C | 26°C | 288 mm | 26 | – | – | 6.1 |
| November | 28°C | 26°C | 288 mm | 21 | – | – | 6.1 |
| December | 27°C | 26°C | 144 mm | 13 | – | – | 7.0 |
Frequently asked questions
When is the best time to visit Ko Samui?
The best months are February, March.
When is the rainy season in Ko Samui?
The wettest months are October, September, May.