Thai Meteorological Department Issues Heavy Rain Warning for 41 Provinces

On October 26, 2026, the Thai Meteorological Department (TMD) released a weather advisory for October 27, 2026, warning of volatile conditions across 41 provinces, including Bangkok and its surrounding areas. The forecast indicates that 60% of these regions will experience heavy to very heavy rainfall accompanied by gusty winds.

According to the TMD, a high-pressure system from China is currently affecting upper Thailand, while a strengthening monsoon trough is impacting the central southern region. Residents and travelers in the southern provinces are specifically cautioned against flash floods and forest runoff, particularly in low-lying areas and near mountain slopes. In upper Thailand, the public is advised to avoid open spaces, large trees, and unstable billboards due to the risk of thunderstorms and strong winds.

Marine conditions are also affected; the Andaman Sea and the Gulf of Thailand are expected to see waves exceeding two meters in areas experiencing thunderstorms. Mariners are urged to exercise extreme caution and avoid navigating through storm-affected zones.

While the TMD has provided this 24-hour forecast, the duration of these volatile conditions remains subject to change based on the movement of the monsoon trough. Travelers are encouraged to monitor local updates closely before planning outdoor activities or maritime travel in the affected regions.