Normally, you can expect the weather in Ko Samui right through the month of May is 29 with a high of 33 and low of 26 degrees celsius. We have put some more detail below here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 29 |
| High Temperature | 33 |
| Low Temperature | 26 |
| Sunshine Per Day | 7 |
Useful Links: Ko Samui Weather: Average Weather & Yearly Climate