Being a beach destination, the best time to visit Koh Samet is November to February because it's neither too hot nor too rainy.
| Month | High/Low (°C) | Rain |
|---|---|---|
| January | 30°/ 25° | 2 days |
| February | 31°/ 26° | 3 days |
| March | 31°/ 27° | 7 days |
| April | 31°/ 27° | 12 days |
| May | 32°/ 28° | 22 days |
| June | 31°/ 27° | 26 days |
| July | 31°/ 27° | 22 days |
| August | 30°/ 26° | 31 days |
| September | 29°/ 26° | 25 days |
| October | 31°/ 26° | 25 days |
| November | 31°/ 25° | 8 days |
| December | 30°/ 24° | 0 days |