Thailand in September

Wettest month in Bangkok and on the Andaman coast; flooding in low areas. Only for low prices.

• Bangkok and centre · Bangkok, Ayutthaya, Kanchanaburirainy

  Cool season Nov–Feb is the easy window; April reaches 38 °C; September and October bring street flooding in short bursts.

• North · Chiang Mai, Chiang Rai, Pairainy

  Cool nights Dec–Jan; the burning season (Feb–Apr) puts air quality among the worst in Asia — check AQI before booking.

• Andaman coast · Phuket, Krabi, Koh Lanta, Khao Lakrainy

  Southwest monsoon May–Oct: rough seas, red-flag beaches, and the Similan and Surin parks closed.

• Gulf islands · Koh Samui, Koh Phangan, Koh Taofine

  Opposite rhythm: dry and calm Feb–Sep, wettest Oct–Dec when ferries can cancel.

• Bangkok32° / 25°, 21 rain days

Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.

• Phuket Vegetarian Festival

  Sep–Oct (9 days, lunar)

  Street processions with piercings in Phuket Town; road closures and firecrackers.

• Vegetarian (Jay) Festival check

  First nine days of the 9th Chinese lunar month · Bangkok

  Yellow flags mark meat-free stalls; Chinatown classics in vegan versions.

Crowds · Thailand

Low

Prices · Thailand

Low

• A rain jacket or umbrella and shoes that dry fast

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Better another month

• Bangkok

  Wettest month; street flooding in low areas after storms.