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

Key summary

On October 21, 2026, the Thailand Meteorological Department issued a forecast for the next 24 hours predicting continuous rainfall with heavy rain in parts of the South. The department warned that areas prone to flooding and flash floods should be monitored closely due to accumulated rainfall which could cause sudden floods and flash floods in mountainous slopes and low-lying areas. High pressure systems covering northern Thailand, northeastern Thailand, and the South China Sea are driving southeast winds bringing moisture from the South China Sea and Gulf of Thailand to lower northeastern Thailand, central Thailand, Bangkok and its surroundings, and eastern Thailand. A monsoon trough is passing through the Gulf of Thailand and southern-central Thailand. In the Andaman Sea and Gulf of Thailand, waves are expected to exceed 2 meters in areas with thunderstorms, prompting a warning for ships to navigate carefully and avoid stormy areas.