Thailand Meteorological Department Issues Heavy Rain Warning for October 17–22
The Thai Meteorological Department has warned of renewed heavy rainfall across several regions, including Bangkok, between October 17 and 22, 2026, citing potential flash floods.
According to a report by Khaosod Online Thailand, the Thai Meteorological Department (TMD) has issued a seven-day weather forecast covering October 16–22, 2026. The forecast indicates a shift in weather patterns that will bring increased rainfall to various parts of the country.
From October 17 to 19, northern and upper northeastern regions will see a slight decrease in rain, while the southern region is expected to experience heavy to very heavy rainfall due to a monsoon trough. However, the situation is expected to change between October 20 and 22, as a new cold air mass from China moves into the upper regions. This shift will likely result in increased rainfall and heavy downpours across the lower Northeast, lower Central region, Bangkok and its vicinity, and the East.
Residents and travelers are advised to remain cautious of potential flash floods and forest runoff, particularly in low-lying areas and regions near hillsides. Marine conditions in the Andaman Sea and the Gulf of Thailand are expected to feature waves around one meter high, rising to over two meters in areas affected by thunderstorms. Mariners are urged to exercise caution and avoid sailing in stormy conditions. While the forecast provides a general outlook, local weather conditions can change rapidly; residents should monitor official updates from the TMD for the most current information.
