Thailand Meteorological Department Issues Heavy Rain Warning Until October 25

Key summary

The Thai Meteorological Department issued its seventh alert on October 20, 2026, warning of heavy to very heavy rainfall across Thailand until October 25, 2026. The forecast indicates continuous rain and localized heavy downpours affecting the East and South regions immediately, with additional heavy rain expected in Northeastern lower areas, Central region (including Bangkok and surrounding provinces), Eastern region, and Upper South between October 21 and 25. Strong gusts are also possible. The department attributes the weather pattern to a monsoon trough crossing central southern Thailand and the southwest monsoon, while high-pressure systems from China cover northern and northeastern upper regions. Sea waves in the Andaman Sea and Gulf of Thailand are forecast to exceed 3 meters during thunderstorms, prompting warnings for mariners. Specific 24-hour forecasts for October 20 show a 60% chance of thunderstorms in Central, Eastern, and Bangkok areas; 70% in both Southern coasts; 20% in Northeastern provinces like Nakhon Ratchasima, Buriram, Surin, Sisaket, and Ubon Ratchathani; and 10% in Northern provinces like Mae Hong Son and Tak. Temperatures range from a low of 21°C to 25°C in the North and up to 35°C in the Central region.