Safety
Thailand Issues Warning for Heavy Rainfall from September 23-27
The Thai Meteorological Department has issued a weather alert for widespread heavy to very heavy rainfall across most of the country starting September 23.
According to an announcement from the Thai Meteorological Department (TMD) on September 21, 2026, a new weather system is expected to bring heavy to very heavy rainfall to Thailand between September 23 and September 27, 2026.
Affected Regions
The alert covers the Northern, Lower Northeastern, Central (including Bangkok and its vicinity), Eastern, and Southern regions. The weather pattern is expected to begin in the Lower Northeast and Eastern regions before spreading to other areas.
Causes and Risks
This weather event is driven by a strong low-pressure area moving from the coast of central Vietnam, combined with a monsoon trough passing over upper Thailand and an intensifying southwest monsoon over the Andaman Sea and the Gulf of Thailand. Residents and travelers in these areas should be prepared for potential flash floods and forest runoff.
What Remains to be Confirmed
While the TMD has identified the affected regions, specific localized impacts and the exact intensity of rainfall in individual provinces may vary. Travelers are advised to monitor local weather updates and follow instructions from local authorities as the situation develops throughout the week. Please check official TMD channels for the most current provincial-level forecasts.