September is the month Bangkok empties. It rains more than any other month, the canals run high, and you can stand alone in front of the Emerald Buddha on a weekday morning.
Weather#
| Typical | |
|---|---|
| Days | Low 30s °C, highest humidity of the year |
| Nights | Mid to high 20s |
| Rain | Most days, sometimes for hours, heaviest in the afternoon and evening |
| Flooding | Common in low streets after big storms; clears in hours |
August is a little drier; October starts to dry out in its second half. Weather by month.
What flooding means for you#
Water on the pavement, sometimes to the knee, for an afternoon in parts of Sukhumvit, Chinatown, Ratchada or the old city. Taxis slow to a crawl; the BTS and MRT do not care. Wear sandals you can wade in, keep your phone in a dry bag, and do what the locals do: get a bowl of noodles and wait. The BTS and MRT guide is your September map.
What still works#
Everything indoors, which in Bangkok is a lot: the mall belt, the museums, the Jim Thompson House, massage, cooking classes, cafés. Morning temples, before the rain builds. Street food under the awnings. Rooftop bars between storms, when the air is scrubbed clean and the city steams. The Vegetarian Festival in Chinatown falls in late September or October, nine days of yellow flags and some of the best food of the year.
Crowds and prices#
The cheapest hotels and the fewest tourists. Rooms that cost a fortune in December are a fraction of the price; you can book two days ahead. Where to stay; Bangkok on a budget hardly needs a guide this month.
Should you come?#
Yes, if you are on a long trip, on a budget, or have been before and want the city without the crowd. No, if you have four days and a list. The honest rule: September rewards flexibility and punishes schedules.
Plan it#
The 3-day itinerary, held loosely. Post your dates on Roavi Community. A Local Friend who lives here knows which plan to switch to when the sky goes black at two.
Bangkok in September? Cheapest, wettest, emptiest. Have a local on your side.
Meet a Local FriendFrequently Asked Questions
Is September the worst month to visit Bangkok?
It is the wettest. Whether that makes it the worst depends on you. Rain comes most days, often in the afternoon but sometimes for longer spells, and some streets flood for a few hours. The trade is the lowest prices and no crowds.Does Bangkok flood in September?
Streets in low-lying areas flood after heavy storms, usually ankle to knee deep, and drain within hours. The BTS and MRT keep running. Serious city-wide flooding is rare and makes international news when it happens.Is anything closed in Bangkok in September?
No. Temples, markets, museums, malls and restaurants all run as normal. Some boat services pause during storms and the floating markets are quieter.How hot is Bangkok in September?
Low thirties Celsius by day and high twenties at night, with the highest humidity of the year. The rain cools the evenings.
