Weather Alert: Heavy Rains and Rough Seas Forecast for Southern Thailand
The Thai Meteorological Department has issued warnings for heavy rainfall in the South and fluctuating weather conditions across upper Thailand through late November 2026.
Weather Outlook
The Thai Meteorological Department (TMD) has reported that a weakening high-pressure system is currently influencing weather patterns across Thailand. While upper regions of the country can expect a slight temperature increase with morning fog in the North and Northeast, the South faces more significant weather challenges.
Impact on Travel and Safety
Residents and travellers in Southern Thailand should prepare for isolated heavy rains, with a forecast for scattered heavy to very heavy rainfall between November 18 and 22, 2026. Marine conditions are also a concern; the Gulf of Thailand and the Andaman Sea are expected to experience waves exceeding 2 meters during thundershowers. Specifically, in the lower Gulf, wave heights may surpass 3 meters during periods of intense weather.
Additionally, upper Thailand is expected to see thundershowers accompanied by gusts between November 17 and 18, followed by a shift toward cooler temperatures and stronger winds.
What to Monitor
Those planning travel to coastal areas or the southern provinces should monitor local weather updates closely. While these forecasts provide a general outlook, specific local impacts can change rapidly. Travellers are advised to follow guidance from local authorities and exercise caution when engaging in maritime activities during this period of unstable weather.
