Very heavy rain threatens southern Thailand as gusty weather continues in upper regions
Thailand's Meteorological Department forecasts very heavy rain in the South from November 7–9, with flash flood risks and gusty thundershowers in upper Thailand.
The Thai Meteorological Department (TMD) has forecast very heavy rain in parts of southern Thailand between November 7 and 9, with flash floods and run-off possible, while northern and central provinces continue to experience thundershowers, gusty winds and isolated heavy rain.
In its 13th weather advisory, issued at 5pm on Saturday (November 7, 2026), the department said unsettled conditions would persist across upper Thailand, particularly in the North and Central region.
Residents were advised to take precautions against thundershowers and strong winds, avoiding open spaces, large trees and unstable billboards.
The South is expected to receive more widespread rainfall over the three-day period, with heavy rain in several areas and isolated very heavy rain.
The TMD cautioned that accumulated rainfall could trigger flash floods and run-off, particularly in low-lying areas and communities near waterways and foothills.
The unsettled weather is being caused by another high-pressure system, or cold air mass, from China extending over upper Thailand and the South China Sea, strengthening easterly winds across Thailand and the Gulf of Thailand.
Southern provinces face very heavy rain on November 8–9
The department identified several provinces at risk of heavy and very heavy rain over the three-day period.
November 7
Isolated heavy rain is forecast in parts of three regions.
In the North, the affected provinces are Mae Hong Son, Chiang Mai, Chiang Rai, Lamphun, Lampang, Phayao, Nan, Phrae, Sukhothai, Tak, Kamphaeng Phet and Phichit.
Central provinces at risk include Nakhon Sawan, Uthai Thani, Kanchanaburi, Ratchaburi, Nakhon Pathom, Samut Sakhon and Samut Songkhram.
In the South, heavy rain is expected in Phetchaburi, Prachuap Khiri Khan, Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Ranong, Phang Nga, Phuket and Krabi.
November 8
Very heavy rain is forecast in three southern provinces: Nakhon Si Thammarat, Songkhla and Narathiwat.
Heavy rain is also expected in Prachuap Khiri Khan, Surat Thani, Chumphon, Phatthalung, Pattani, Yala, Trang and Satun.
November 9
The area at risk of very heavy rain is expected to expand to six southern provinces: Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani and Narathiwat.
Other provinces forecast to receive heavy rain are Phetchaburi, Prachuap Khiri Khan, Chumphon, Yala, Ranong, Phang Nga, Phuket, Krabi, Trang and Satun.
Waves could exceed two metres in stormy areas
The TMD also advised mariners in the Gulf of Thailand and the Andaman Sea to exercise caution, with waves expected to exceed two metres in areas experiencing thundershowers.
Boat operators were urged to check weather conditions and planned routes before departure and avoid navigating through areas affected by thundershowers.
Regional weather forecast for November 7–8
The department also issued its 24-hour forecast covering 6pm on November 7 to 6pm on November 8.
Bangkok and surrounding areas
Thundershowers are forecast across 60% of the area, with isolated gusty winds.
Temperatures will range from 25–27°C at night to 33–35°C during the day, with southeasterly winds of 10–20 kilometres per hour.
Northern Thailand
Thundershowers are expected across 70% of the region, accompanied by gusty winds and isolated heavy rain.
The areas most likely to be affected are Mae Hong Son, Chiang Mai, Chiang Rai, Lamphun, Lampang, Phayao, Nan, Phrae, Sukhothai, Tak, Kamphaeng Phet and Phichit.
Minimum temperatures will range from 21–25°C, with maximum temperatures of 30–34°C. Southeasterly winds are forecast at 10–20km/h.
Northeastern Thailand
Thundershowers are forecast across 30% of the region, mainly in Loei, Nong Bua Lam Phu, Chaiyaphum, Khon Kaen, Nakhon Ratchasima and Buri Ram.
Temperatures will range from 21–24°C at night to 32–35°C during the day, with northeasterly winds of 10–25km/h.
Central Thailand
Thundershowers are expected across 60% of the region, with gusty winds and isolated heavy rain in Nakhon Sawan, Uthai Thani, Kanchanaburi, Ratchaburi, Nakhon Pathom, Samut Sakhon and Samut Songkhram.
Minimum temperatures will be 22–25°C, while daytime highs will reach 31–34°C. Easterly winds are forecast at 10–20km/h.
Eastern Thailand
Thundershowers are forecast across 60% of the region, with isolated gusty winds, mainly in Nakhon Nayok, Chachoengsao, Chon Buri, Rayong, Chanthaburi and Trat.
Temperatures will range from 23–26°C at night to 33–35°C during the day, with easterly winds of 10–30km/h.
Waves will generally remain below one metre but could exceed two metres in areas experiencing thundershowers.
Southern Thailand (east coast)
Thundershowers are forecast across 70% of the region, with isolated heavy rain in Phetchaburi, Prachuap Khiri Khan, Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung and Songkhla.
Temperatures are expected to range from 22–25°C at night to 30–34°C during the day.
From Surat Thani northwards, easterly winds will reach 15–30km/h. From Nakhon Si Thammarat southwards, southeasterly winds of 15–30km/h are forecast.
Waves will be around one metre, rising above two metres in areas experiencing thundershowers.
Southern Thailand (west coast)
Thundershowers are expected across 70% of the region, with isolated heavy rain in Ranong, Phang Nga, Phuket and Krabi.
Minimum temperatures will range from 23–26°C, with maximum temperatures of 31–35°C. Easterly winds will reach 15–30km/h.
Waves will be approximately one metre near the coast and more than one metre offshore, increasing to over two metres in areas experiencing thundershowers.
Public advised to monitor further weather updates
The TMD urged residents, particularly those in flood-prone southern provinces, to plan travel and outdoor activities carefully and continue monitoring official weather advisories.
Its next advisory is scheduled for 5am on November 8.
Further information is available through the Thai Meteorological Department's website at www.tmd.go.th or by calling 0-2399-4012-13 or the 1182 weather hotline, available 24 hours a day.
