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Bangkok Flooding: What We Know as of 26 September 2026
Bangkok is dealing with heavy flooding. The Bangkok Metropolitan Administration (BMA) says 487 mm of rain has fallen in the capital since the start of September 2026, which is 82% above the 30-year average for the same period. All 50 Bangkok districts have been declared disaster areas to speed up the flood response. If you're passing through Bangkok, or heading to Koh Lanta via the city, this is worth keeping an eye on.
What's happening
A Bangkok Post video report from 26 September 2026 shows motorists, residents and homeless people in Bangkok dealing with floodwaters. The report is a video, and the details available are limited. It doesn't give location-level detail for specific streets or neighbourhoods.
The rainfall numbers
The BMA is the source for the figures:
- 487 mm of rain in the capital since the start of September 2026
- 82% above the 30-year average for the same period
Official response
All 50 districts of Bangkok have been declared disaster areas. The stated purpose is to speed up the flood response.
What the report doesn't say
The report doesn't cover:
- Casualties
- Road or transit closures
- Damage estimates
- Forecasts
- How long the flooding is expected to last
- Rainfall for 26 September alone
So it isn't a source for what's running or closed right now.
What this could mean for travellers
The report gives no tourist guidance. The points below are our own reading of the situation, not claims from the source:
- A disaster declaration covering every district suggests the flooding isn't limited to a few areas.
- Road transport around Bangkok may be disrupted and travel may be slow. Allow extra time for airport transfers and connecting flights.
- Check current conditions before making plans, and check with your accommodation and airline if you're booked into Bangkok around this date.
- If you're travelling to Koh Lanta through Bangkok, build in buffer time for your connections.
Information sourced from Bangkok Post.