Thailand weather alert brings comfortable sightseeing conditions to the north and Bangkok, while the south faces choppy seas, isolated heavy rain and fire-risk warnings.
Thailand weather alert is shaping travel conditions across the country on 28 November 2025, with the Thai Meteorological Department updating its forecast after a high-pressure system moved in from China. The result is a welcome cool spell in the north and centre, but extra caution is needed in the south, especially at sea.
Cooler air in the north and Bangkok
In the north and in Isan, temperatures are forecast to fall by another 2–4°C. Mornings are cool, the daytime remains sunny and windy, and mountain peaks can become notably cold. At Doi Inthanon, for example, temperatures may drop to 3–14°C.
In Bangkok and the central region, minimum temperatures are currently 18–21°C. For visitors, that makes this one of the most comfortable periods for temple visits, city walks and outdoor sightseeing without the fatigue of intense heat.
Even so, a light jacket is sensible for the evening, especially with the strong northeasterly wind. The dry air and wind also raise fire risk, so open flames should be used with care in exposed areas.
Southbound travellers should watch the sea
While the north enjoys crisp weather, the south is dealing with the northeast monsoon. This affects conditions in both the Gulf of Thailand and the Andaman Sea, where waves may reach up to 2 metres and exceed that in stormy areas.
All vessels, including longtail boats and ferries, should operate with caution. Anyone planning a sea trip should check beach flags and listen to the captain’s instructions before departure.
Isolated heavy rain is expected in the lower south, including Songkhla, Pattani, Yala, Narathiwat, as well as Krabi, Trang and Satun. These downpours are often brief, but they can be intense, so a backup plan for the day is sensible.
Tajfun Koto will not hit Thailand
The Thai Meteorological Department is also monitoring Typhoon Koto, which is currently in the South China Sea. It is forecast to move toward the coast of Vietnam on 28–30 November.
Thanks to the same high-pressure system bringing cooler air to Thailand, the storm is expected to weaken quickly. The key point for travellers is simple: Typhoon Koto is not expected to hit Thailand. Its only effect should be stronger wind in the upper parts of the country.
For now, that means a split picture: very pleasant weather for sightseeing in the north and Bangkok, but caution on southern waters and awareness of short, heavy showers in parts of the far south.
