The Meteorological Department issued its 12th announcement warning of heavy to very heavy rain from October 22-25, 2026, especially in the South and East regions. The Andaman Sea and Gulf of Thailand will have waves exceeding 3 meters in height.
At 17:00 on October 22, 2026, the Meteorological Department issued its 12th announcement regarding heavy to very heavy rainfall in Thailand, effective until October 25, 2026. It stated that from October 22-25, the East and South regions will experience continuous rain with some areas seeing heavy to very heavy rainfall. Meanwhile, the lower Northern region, lower Northeastern region, Central region, including Bangkok and its vicinity, will have thunderstorms with occasional strong gusts.
Residents in these areas are advised to be cautious of dangers from strong gusts, heavy to very heavy rain, and continuous rain accumulation that may cause flash floods and mountain runoff, especially in foothill and lowland areas.
This is due to a monsoon trough crossing central southern Thailand combined with the southwest monsoon covering the lower Andaman Sea. At the same time, a high-pressure area or cold air mass from China is spreading over the upper Northern, upper Northeastern regions, and the South China Sea, resulting in easterly winds covering Thailand and the Gulf of Thailand.
For sea conditions in the Andaman Sea and Gulf of Thailand, areas experiencing thunderstorms will have waves exceeding 3 meters. Mariners in these waters should navigate with caution and avoid sailing in stormy areas. For safety and to minimize potential impacts, the public is advised to plan their activities and travel carefully during this period and to follow continuous updates from the Meteorological Department via its website http://www.tmd.go.th or by calling 0-2399-4012-13 and 1182, available 24 hours a day.
Additionally, the Meteorological Department forecasts heavy to very heavy rain in risk areas from 07:00 on October 23, 2026, to 07:00 on October 24, 2026.
On October 23, 2026, the provinces expected to be affected by "very heavy rain"
On October 24, 2026, the provinces expected to be affected by "heavy rain"