Weather Advisory
Subject: Cool to cold in Thailand
Heavy Rain in the South and Strong wind-waves in the Gulf
(Effect until 23 November 2025)
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Another strong high-pressure system from China extend to upper South and the South China Sea. Cool to cold and a decrease in temperature with strong winds are forecast in the upper country. A decrease in temperature by 1-2 °C are forecast in the North and the Northeast. Cold to very cold on the mountain top. People in upper the country should beware of variable weather, keep healthy due to changeable weather and beware of fire due to dry air and strong wind. Farmers should prevent for crop damage.
The rather strong northeast monsoon will prevail over the Gulf, the South and the Andaman Sea while low pressure cover the lower Gulf and the lower South with scattered heavy rains and isolated very heavy rains in the South during 20-23 November 2025. The rather strong wind forces the waves in the Gulf up to be 2-3 meters high and above 3 meters high in thundershowers while the waves in the upper Andaman Sea are likely about 2 meters high, 2–3 meters high offshore and above 3 meters high in thundershowers. People in the South should beware of heavy to very heavy rains and accumulations that may cause flash flood and overflows, especially along the waterways near foothills and lowlands. People along the Gulf shore should beware of inshore surges. All ships should proceed with caution and keep off thundershowers, small boats in the Gulf and the Andaman Sea offshore keep ashore during 20-23 November 2025.
This advisory is in effect on 20 November 2025, at 5.00 a.m.
This next issue will be on 20 November 2025, at 5.00 p.m.
(Signed) Sugunyanee Yavinchan
(Miss Sugunyanee Yavinchan)
Director-General
Thai Meteorological Department
Verified
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