Best Time to Visit Thailand
When to go for sunshine, calm seas and the lowest crowds — a month-by-month guide to the best time to visit Thailand.
The cool, dry season (Nov–Feb)
This is the best time to visit Thailand. Skies are clear, humidity drops and Bangkok eases to a pleasant 31–32°C, while the islands enjoy calm seas. It is peak season, so book flights and resorts 6–8 weeks ahead — especially around Christmas and New Year.
The hot season (Mar–May)
Temperatures climb to 34–35°C and beyond, peaking in April around the Songkran water festival. It is a fun, soaking-wet celebration, but inland cities like Bangkok and Chiang Mai can be uncomfortably hot, and northern air quality dips during the burning season.
The green (monsoon) season (Jun–Oct)
Short, heavy afternoon downpours bring lush scenery and the year’s lowest prices. Mornings are often clear enough for sightseeing. The Andaman coast (Phuket, Krabi) is wetter now, while the Gulf islands (Koh Samui) actually stay drier until later.
Picking islands by coast
Thailand has two monsoon patterns. For November–April choose the Andaman side — Phuket, Krabi and Phi Phi. From roughly May to September the Gulf coast — Koh Samui, Koh Phangan, Koh Tao — is the safer bet for sunshine.
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Plan my Thailand tripFrequently asked questions
The cool, dry season (Nov–Feb) — what should I know?
This is the best time to visit Thailand. Skies are clear, humidity drops and Bangkok eases to a pleasant 31–32°C, while the islands enjoy calm seas. It is peak season, so book flights and resorts 6–8 weeks ahead — especially around Christmas and New Year.
The hot season (Mar–May) — what should I know?
Temperatures climb to 34–35°C and beyond, peaking in April around the Songkran water festival. It is a fun, soaking-wet celebration, but inland cities like Bangkok and Chiang Mai can be uncomfortably hot, and northern air quality dips during the burning season.
The green (monsoon) season (Jun–Oct) — what should I know?
Short, heavy afternoon downpours bring lush scenery and the year’s lowest prices. Mornings are often clear enough for sightseeing. The Andaman coast (Phuket, Krabi) is wetter now, while the Gulf islands (Koh Samui) actually stay drier until later.
Picking islands by coast — what should I know?
Thailand has two monsoon patterns. For November–April choose the Andaman side — Phuket, Krabi and Phi Phi. From roughly May to September the Gulf coast — Koh Samui, Koh Phangan, Koh Tao — is the safer bet for sunshine.