Thailand Meteorological Department Warns of Heavy Rain and Flood Risks in Eastern and Southern Regions

Key summary

On October 23, 2026, the Thailand Meteorological Department issued a weather forecast warning that eastern and southern provinces will experience heavy rainfall, with flash floods and mountain torrents expected in hilly and low-lying areas. The department noted that high-pressure systems over northern Thailand and the South China Sea are driving moist southeast winds into lower northeastern, central, Bangkok, and eastern regions, while a monsoon trough crosses the Gulf of Thailand and southern central provinces. Rainfall coverage is projected at 10% for northern and northeastern provinces, 40% for central provinces, and 60% for eastern, southern (both coasts), and Bangkok metropolitan areas. Temperatures are expected to range from 21°C to 37°C across the country, with wind speeds between 10-30 km/h depending on the region. Sea waves in the Andaman and Gulf of Thailand are forecast to exceed 2 meters in areas with thunderstorms.