Announcement from the Meteorological Department of Thailand (TMD) regarding weather conditions. Issue 4 warns upper Thailand to prepare for unstable weather featuring thunderstorms, strong gusty winds, hail, and heavy rain in some areas from 5–7 Nov. The southern region will experience increased and heavy rainfall across many areas from 7–9 Nov.
On 3 Nov 2026, the Meteorological Department's website issued Bulletin No. 4 on unstable weather in upper Thailand and heavy to very heavy rain in the south, effective 5–9 Nov 2026.
From 5–7 Nov 2026, upper Thailand will experience unstable weather with thunderstorms, strong gusty winds, hail, and heavy rain in some areas. The Northeast will be affected first, followed by the North, Central region including Bangkok and its vicinity, and the East. Residents are advised to be cautious of thunderstorms and strong winds and to avoid open spaces, large trees, and weak billboards.
From 7–9 Nov 2026, the southern region will have increased rain and heavy rainfall in many areas, including some very heavy rain. Residents should beware of accumulated rainfall that may cause flash floods and mountain runoff, especially in hilly areas near waterways and lowlands.
This weather is caused by a high-pressure system or another cold air mass spreading from China over upper Thailand and the South China Sea, strengthening easterly winds over Thailand and the Gulf of Thailand.
In the Andaman Sea and Gulf of Thailand where thunderstorms occur, waves will be over 2 meters high. Mariners in these areas should navigate cautiously and avoid sailing during thunderstorms.
For safety and to reduce potential impacts, residents should plan daily activities and travel carefully during this period. Continuous monitoring of updates from the Meteorological Department via http://www.tmd.go.th or by calling 0-2399-4012-13 and 1182 is advised, available 24 hours.
The daily weather forecast indicates that the North, Northeast, Central region including Bangkok and vicinity, and East will continue to have thunderstorms and some gusty winds. The South will see increased rain and heavy rainfall in some areas. Residents in these regions should be cautious of thunderstorms and gusty winds, avoiding open spaces, large trees, and unstable billboards during this period.
This is due to another cold air mass or high-pressure system spreading from China covering upper Northeast Thailand and the South China Sea, while easterly winds cover the Gulf of Thailand, Thailand, and the Andaman Sea.
In the Andaman Sea and Gulf of Thailand areas with thunderstorms, waves will be higher than 2 meters. Mariners should navigate cautiously and avoid sailing in thunderstorm areas.
From 06:00 today until 06:00 tomorrow.
Northern region.
There will be thunderstorms covering 30% of the area with gusty winds in some places, mainly in Mae Hong Son, Chiang Mai, Uttaradit, Tak, Phitsanulok, and Phetchabun provinces. Minimum temperatures range from 21-24°C, maximum 35-37°C. Easterly winds at 10-20 km/h.
Northeastern region.
Thunderstorms will affect 20% of the area with gusty winds in some places, mainly in Khon Kaen, Chaiyaphum, Nakhon Ratchasima, Buriram, Surin, Sisaket, and Ubon Ratchathani provinces. Minimum temperatures 21-25°C, maximum 35-36°C. Northeasterly winds at 10-20 km/h.
Central region.
Thunderstorms cover 40% of the area with gusty winds in some places, mainly in Kanchanaburi, Suphanburi, Lopburi, Saraburi, Ratchaburi, Ayutthaya, Nakhon Pathom, Samut Songkhram, and Samut Sakhon provinces. Minimum temperatures 24-26°C, maximum 35-36°C. Easterly winds at 10-20 km/h.
Eastern region.
Thunderstorms cover 60% of the area with gusty winds in some places, mainly in Nakhon Nayok, Prachinburi, Sa Kaeo, Chachoengsao, Chonburi, Rayong, Chanthaburi, and Trat provinces. Minimum temperatures 23-25°C, maximum 33-35°C. Southeasterly winds at 10-30 km/h. Waves are less than 1 meter, but in thunderstorm areas waves exceed 2 meters.
Southern region (east coast).
Thunderstorms cover 60% of the area with heavy rain in some places, mainly in Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala, and Narathiwat provinces. Minimum temperatures 22-25°C, maximum 32-34°C. From Surat Thani northward: easterly winds at 15-30 km/h, waves about 1 meter, exceeding 2 meters in thunderstorm areas. From Nakhon Si Thammarat southward: southeasterly winds at 15-30 km/h, waves about 1 meter, exceeding 2 meters in thunderstorm areas.
Southern region (west coast).
Thunderstorms cover 60% of the area, mainly in Phang Nga, Phuket, Trang, and Satun provinces. Minimum temperatures 23-24°C, maximum 32-35°C. Easterly winds at 15-30 km/h. Waves about 1 meter, more than 1 meter offshore, and over 2 meters in thunderstorm areas.
Bangkok and vicinity.
Thunderstorms cover 60% of the area with gusty winds in some places. Minimum temperatures 24-26°C, maximum 33-36°C. Southeasterly winds at 10-20 km/h.