Best Time to Visit Krabi
Recommended: May to Oct
When to go
Krabi sits on the Andaman coast, so its wet season runs roughly May through October, the same window as Phuket and unlike the Gulf coast (Koh Samui), which floods in November instead. Peak dry season is December to March: blue skies, calm seas, highest prices. April turns hot and humid before the rains. September and October bring the heaviest rain and roughest seas for island trips.
Month by month in Thailand
Krabi sits in Thailand, so the country's broader seasonal pattern applies. November to February is dry and cool almost everywhere and the closest thing to a universal answer. After that it splits by coast: the Andaman side and the Gulf side flood at different times of year.
Nov-FebCool and dry nationwide, the safest bet for Bangkok, Chiang Mai and both coasts. Also the most crowded and priciest.
Mar-AprHot season, temperatures spike into the high 30s. Songkran water festival mid-April is chaotic fun if you don't mind getting soaked.
May-OctSouthwest monsoon soaks the Andaman coast (Phuket, Krabi), wettest around Sept. The Gulf side (Koh Samui) stays comparatively dry through most of this window.
Oct-DecNortheast monsoon flips it: Koh Samui and the Gulf islands get their rain, peaking in November, while the Andaman coast dries out.