The Meteorological Department has issued its second bulletin warning that from 18 to 22 November 2026, the southern region will experience very heavy rainfall, while upper Thailand will initially have thunderstorms before temperatures cool down by 2-4 degrees Celsius.
At 5:00 p.m. on 15 November 2026, the Meteorological Department announced heavy to very heavy rainfall in the southern region, effective from 18 to 22 November 2026.
Between 18 and 22 November 2026, the southern region will face continuous rainfall, with heavy rain in many areas and very heavy rain in some. Residents should be cautious of dangers from prolonged rainfall that may cause flash floods and forest runoff, especially in foothill areas near waterways and lowlands. Waves and winds in the Gulf of Thailand and Andaman Sea will strengthen, with wave heights about 2 meters in the lower Gulf and exceeding 3 meters in thunderstorm zones. Mariners in these areas should check their routes and navigate with caution, avoiding sailing in regions experiencing thunderstorms.
In upper Thailand, there will be thunderstorms and strong gusts in some areas initially, followed by colder weather with strong winds. Temperatures in the northeast will drop by 2-4 degrees Celsius, while the north, central region including Bangkok and its vicinity, and the east will see a temperature decrease of 1-3 degrees Celsius. The public is advised to take care of their health due to changing weather conditions, and farmers should protect their crops from possible damage.
This is due to a new moderate high-pressure system or cold air mass from China spreading over upper Thailand and the South China Sea, combined with a strengthening northeast monsoon covering the Gulf of Thailand, southern region, and Andaman Sea.
For safety and to minimize potential impacts, residents are advised to carefully plan their activities and travel during this period. The public should continuously follow updates from the Meteorological Department and can access information on their website.https://www.tmd.go.thOr call 0-2399-4012-13 and 1182, available 24 hours.
The Meteorological Department will issue its next bulletin on 16 November 2026 at 5:00 a.m.