Best time to visit
Climate is tropical and the weather is hot and humid in Koh Tao throughout the year. The air temperature ranges between 28 °C to 32°C.
The Peak Tourist season runs from December to March and July, August. During these periods, it is better to book in advance. Especially during Christmas holidays, hotels and resorts are often fully booked months ahead.
The Rainy Season runs from September to November. Water visibility can be reduced by 30 % after heavy rains. Monsoon is mostly short 2 hour downfalls in the late afternoon but there are also rainy days.
The Best time to visit Koh Thao is in May and June when the weather is not too hot and there are less tourists. Accommodation prices depend on the season.
It is possible to dive in Koh Tao all year round. The best diving time runs from May to August when the conditions are excellent. Luckily it is also the off season on the West coast of Thailand. Water temperature is about 29 °C all year round.
Check the below table for the general idea of Koh Tao weather throughout the year.
Month | Avg. High (°C) | Avg. Mean (°C) | Avg. Low (°C) |
---|---|---|---|
Jan | 29.1 | 26.8 | 24 |
Feb | 29.3 | 27.4 | 24.7 |
Mar | 30.3 | 28.2 | 25.2 |
Apr | 31.8 | 29.1 | 25.6 |
May | 33 | 29.2 | 25.5 |
Jun | 33 | 29.1 | 25.4 |
Jul | 32.4 | 28.5 | 24.9 |
Aug | 32.7 | 28.7 | 25 |
Sep | 32.1 | 28.3 | 24.8 |
Oct | 30.9 | 27.6 | 24.2 |
Nov | 29.8 | 27.2 | 23.8 |
Dec | 29.6 | 27.1 | 23.9 |