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Thailand's ninth heavy-rain warning: South alert 12-13 October

Thailand's Meteorological Department issued Warning No. 9 on 11 October, covering the lower North, Bangkok, the East and the South. From 12 October the warning narrows to the South.

Kylian Dev

Storm clouds over a palm-lined street with standing water on the asphalt
Photo: Alexey Komarov · CC BY-SA 4.0

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In short

  • Warning No. 9 (255/2026) runs from 11 to 13 October 2026.
  • 11 October: lower North, Bangkok, the East and the South.
  • Gulf and Andaman waves can exceed two metres in thunderstorms.

What to do

  1. 1Check the latest warning from the Thai Meteorological Department.
  2. 2Confirm your ferry, flight or crossing with the operator.
  3. 3In a storm, avoid open ground, large trees and loose billboards.

What has been issued, and where?

According to the Bangkok Post, Warning No. 9 (255/2026) warns of thunderstorms, gusty winds, hail and isolated heavy to very heavy rain with lightning from 11 to 13 October 2026.

DatesAreas named in the warning
11 OctoberLower North, Central region including Bangkok, the East, the South
12-13 Octoberthe South

In the East, thunderstorms are forecast over about 70 percent of the region on 11 October, with Nakhon Nayok, Chachoengsao, Chonburi, Rayong, Chanthaburi and Trat named.

What does it change for travellers?

Waves in the Gulf of Thailand and the Andaman Sea can exceed two metres in thunderstorms, and ships have been told to keep clear. Flash floods, runoff and landslides are possible along waterways near hills and on low ground. Route-by-route sea conditions are in Thailand ferries.

No emergency, curfew, airport closure or travel ban has been announced, and no flight or transport suspensions have been reported.

Who has been told to prepare?

According to the Bangkok Post, Prime Minister Anutin Charnvirakul told 14 southern provinces plus Phetchaburi and Prachuap Khiri Khan to prepare for further heavy rain. Pattaya's mayor ordered a 24-hour flood and rough-sea watch on 9 October; the warning does not say the city will flood. See Bangkok to Pattaya and Is Thailand safe?.

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Sources

We cross-check each story against official pages and several media, and rewrite it in our own words for travellers.

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