Koh Samui
Thailand
Best time to visit: December to January, and August
About Koh Samui
A Thai island of luxury resorts, palm-lined beaches, yoga retreats, and spas. A honeymoon favorite at mid-to-upper budget.
Monthly guide to Koh Samui
| Month |
Rating |
Temp | Weather | Notes |
| January |
Excellent |
27° | Warm | Warm. Best time to visit. |
| February |
Good |
28° | Warm rainy | Warm rainy. Good time to visit. |
| March |
Good |
29° | Hot | Hot. Good time to visit. |
| April |
Good |
30° | Hot | Hot. Good time to visit. |
| May |
Okay |
30° | Hot rainy | Hot rainy. Visitable but with weather challenges. |
| June |
Good |
30° | Hot | Hot. Good time to visit. |
| July |
Good |
30° | Hot | Hot. Good time to visit. |
| August |
Excellent |
29° | Hot dry | Hot dry. Best time to visit. |
| September |
Good |
29° | Hot | Hot. Good time to visit. |
| October |
Good |
28° | Warm rainy | Warm rainy. Good time to visit. |
| November |
Good |
28° | Warm rainy | Warm rainy. Good time to visit. |
| December |
Excellent |
28° | Warm | Warm. Best time to visit. |
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Seasonal data from trusted sources, reviewed by Albattar travel experts. · Last updated: 2026-05-09