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.  

The best time to book your holiday in Koh Samui is from December to June.

October and November are the rainiest months in Koh Samui, but it’s still possible to get several nice days in a row during this time.

Maximum daytime temperature – 27°C

Minimum night time temperature – 22°C

Average rainfall – 91mm per month

Average daylight hours – 7

What’s the weather like in Koh Samui from December to June?

Koh Samui has a tropical monsoon climate. There is little difference in temperatures throughout the year, and the island can be visited all year round. Temperatures average 22-32°C and humidity often reaches over 80%. The humidity can be escaped easily by heading to the beaches.

Why visit Koh Samui from December to June?

  • Good visibility for diving and snorkelling
  • Air feels fresher and the heat is more bearable
  • Late December to May are the driest months
  • February and March are the sunniest months
  • April is the hottest month
  • June is pleasant and quiet as the school holidays haven’t yet begun

 

Best times to visit

 

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