About Ko Samui
Ko Samui is an island off the east coast of Thailand. Geographically in the Chumphon Archipelago, it is part of Surat Thani Province, though as of 2012, Ko Samui was granted municipal status and thus is now locally self-governing. Ko Samui, with an area of 228.7 square kilometres, is Thailand's second largest island after Phuket. In 2018, it was visited by 2.7 million tourists.
More background: Ko Samui on Wikivoyage
When to go
Best months for Gulf coast (Samui, Pha Ngan, Tao, Songkhla): Feb to Apr. Month-by-month guide
- Jan Good
- Feb Best
- Mar Best
- Apr Best
- May Good
- Jun Good
- Jul Good
- Aug Good
- Sep Good
- Oct Mixed
- Nov Avoid
- Dec Mixed
Regional weather guide, not specific to Ko Samui. Tap a month for details.
