Weather, crowds, prices, and festivals — month by month. Click any month to see which regions to visit, which to avoid, and the right itinerary for that window.
Green season continues. European summer crowds bump up demand. Andaman is wet but Samui-side stays dry-ish.
Rain: Heavy (180-260mm)
Sea: Rough Andaman, calm Gulf
Heads up: alcohol sales are banned on Buddhist holidays. Stock up beforehand.
Bangkok 3 nights → Chiang Mai 4 nights → Koh Samui 5 nights.
You picked the month. These tools handle the rest.