Safety
Thailand Issues Heavy Rainfall Warning for September 17–20, 2026
The Thai Meteorological Department has issued its first warning for heavy to very heavy rainfall across the country, expected to impact most provinces starting September 17.
According to a report from Khaosod Online Thailand, the Thai Meteorological Department (TMD) released its first official announcement (No. 205/2569) regarding severe weather conditions expected across Thailand from September 17 to 20, 2026.
Weather Forecast and Impact
The TMD reports that a high-pressure system from China will move into the upper northern and northeastern regions, causing a monsoon trough to shift over the central, eastern, and upper southern parts of the country. Simultaneously, the southwest monsoon over the Andaman Sea and the Gulf of Thailand is expected to strengthen.
- September 17: Initial impacts are expected in the North and Northeast.
- September 18–20: The weather system will extend its influence to the Central, Eastern, and Southern regions.
What This Means for You
Residents and travelers in 57 provinces should prepare for heavy to very heavy rainfall during this period. These conditions may lead to localized flooding, travel disruptions, and hazardous road conditions.
Status of Information
While the TMD has identified the affected regions and the timeline for the weather system, specific localized intensity levels for each province remain subject to daily updates. Travelers are advised to monitor official TMD announcements and local news outlets closely for real-time weather alerts and safety instructions as the situation develops.
