Destination

Koh Samui – Best time to go

Best time to visit Koh Samui

Koh Samui is a great year-round destination with average temperatures reaching between 22–32°C and levels of humidity often reaching over 80%. Late December to May are popular times to visit as visibility is good for diving and they are the driest months. We particularly love the months from December through to June when the air feels fresher, the heat is less oppressive, and the beaches are a little less busy.  

Best times to visit

Dry Season

December to March is the driest time of year, with February in particular seeing very little rainfall. April to August is still hot and sunny, with pleasant temperatures and the occasional short shower to freshen things up.  

Rainy Season

In Koh Samui the months of September, October and November see their fair share of monsoon showers. However, they tend to be short, even refreshing and the days are still warm and often sunny. 

Select month

Average weather in January

Best travel weather

Avg. temp
Avg. rainfall
Koh Samui
28ºC
90mm

Average weather in February

Best travel weather

Avg. temp
Avg. rainfall
Koh Samui
29ºC
30mm

Average weather in March

Best travel weather

Avg. temp
Avg. rainfall
Koh Samui
31ºC
30mm

Average weather in April

Best travel weather

Avg. temp
Avg. rainfall
Koh Samui
32ºC
80mm

Average weather in May

Best travel weather

Avg. temp
Avg. rainfall
Koh Samui
33ºC
160mm

Average weather in June

Average travel weather

Avg. temp
Avg. rainfall
Koh Samui
32ºC
100mm

Average weather in July

Average travel weather

Avg. temp
Avg. rainfall
Koh Samui
32ºC
120mm

Average weather in August

Average travel weather

Avg. temp
Avg. rainfall
Koh Samui
32ºC
100mm

Average weather in September

Average travel weather

Avg. temp
Avg. rainfall
Koh Samui
31ºC
130mm

Average weather in October

Average travel weather

Avg. temp
Avg. rainfall
Koh Samui
30ºC
290mm

Average weather in November

Average travel weather

Avg. temp
Avg. rainfall
Koh Samui
29ºC
430mm

Average weather in December

Best travel weather

Avg. temp
Avg. rainfall
Koh Samui
29ºC
150mm