Weather
Afternoon downpours, mostly short. The Andaman coast (Phuket, Krabi, Phi Phi) sees swell and some cancelled boat days; Koh Samui, Phangan and Tao are usually dry and calm.
The trade-off
Half-price hotels, empty beaches and green landscapes, against a real chance of losing a boat day. If you are flexible, it is the best value month of the year.
Where to go
The Gulf for beaches, the north for culture (the rain is lighter and the rice fields are at their best). Avoid fixed boat-dependent itineraries on the Andaman.
