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The best time to visit Koh Tao
March, April, May, June, July and August — daytime highs around 29°C. Every number on this page is measured, not guessed.
Koh Tao month by month
| Month | Day | Night | Wet days | |
|---|---|---|---|---|
| January | 27°C | 25°C | 4 | |
| February | 27°C | 26°C | 11 | Shoulder |
| March | 28°C | 26°C | 7 | Best |
| April | 29°C | 27°C | 14 | Best |
| May | 29°C | 27°C | 22 | Best |
| June | 29°C | 27°C | 23 | Best |
| July | 29°C | 27°C | 21 | Best |
| August | 29°C | 27°C | 21 | Best |
| September | 28°C | 26°C | 25 | Shoulder |
| October | 28°C | 26°C | 27 | |
| November | 28°C | 26°C | 24 | |
| December | 27°C | 26°C | 11 |
The short version
Warmest: April, around 29°C by day. Coolest: January, around 27°C by day and 25°C at night. Wettest: October with about 27 wet days. Driest: January with about 4.
If you want fewer people: February, September sit right beside the best months. The weather is close and the crowds are not.
Book it for those months
Prices climb as the good months fill up.
Common questions
When is the best time to visit Koh Tao?
The best months are March, April, May, June, July and August, when daytime highs sit around 29°C.
What is the hottest month in Koh Tao?
April, with daytime highs around 29°C.
What is the wettest month in Koh Tao?
October, with about 27 wet days. The driest is January with about 4.
When is the cheapest time to visit Koh Tao?
Prices follow the weather. The months either side of the best ones — February, September — are usually cheaper with similar conditions.
Temperatures and wet days are measured, not estimated: ERA5 reanalysis for 2021-2023, at Koh Tao, Surat Thani. Source: Open-Meteo.