Thai Meteorological Department Issues Weather Warning for Eastern Thailand and Southern Coasts on October 23

Key summary

The Thai Meteorological Department (TMD) forecasts thundershowers covering over 60% of eastern Thailand and both southern coasts from 6am on October 23 to 6am on October 24, 2026. Isolated heavy rain is expected in these areas, while parts of upper Thailand will experience strong wind gusts. A monsoon trough is positioned across the Gulf of Thailand and central South, whereas a high-pressure system covers the upper North, upper Northeast, and South China Sea. The TMD warns southern residents to be cautious of flash floods and rapid run-off in low-lying areas and near foothills due to accumulated rainfall. Wave heights could exceed two metres in the Andaman Sea and Gulf of Thailand during thundershower periods, prompting a caution for mariners.