The cool season, from November through February, offers the most comfortable conditions for sightseeing, with lower humidity and temperatures ranging from 20-32 degrees Celsius in most areas. This is peak tourist season, and advance bookings for luxury accommodations are recommended.
The hot season brings temperatures that can exceed 40 degrees Celsius, particularly in April. Coastal destinations and air-conditioned environments become essential during this period, though beach resorts remain pleasant with sea breezes.
During the rainy season, expect short but intense afternoon showers rather than all-day rain. Mornings typically remain sunny, and the countryside turns lush and green. An important note: Thailand's southern coasts experience different weather patterns. The Andaman coast (Phuket, Krabi) sees rain from April to October, while the Gulf coast (Koh Samui, Koh Phangan) is wettest from October to December, making beach travel possible year-round by choosing the appropriate coast.
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