TMD issues warning No 8 for heavy rain on Oct 10–13
Bangkok faces heavy rain risks on October 10–11, while southern Thailand remains under warning through October 13, with flash floods possible.
- The Thai Meteorological Department (TMD) has issued a warning for heavy to very heavy rain across parts of Thailand from October 10 to 13.
- The warning initially affects a wide area including Bangkok on October 10-11, before concentrating on Southern provinces for October 12-13.
- Officials warn of potential flash floods, sudden runoff, thundershowers, and gusty winds, particularly in low-lying areas and on foothill slopes.
- Mariners are advised of hazardous conditions, with waves in the Andaman Sea and Gulf of Thailand potentially exceeding 2 meters during thundershowers.
The Thai Meteorological Department (TMD) issued Warning No. 8 at 5pm on October 10, 2026, forecasting isolated heavy to very heavy rain in parts of Thailand through October 13 and warning of flash floods and sudden runoff.
The advisory forecasts unsettled weather, including thundershowers, gusty winds, hail and possible lightning strikes. Bangkok and surrounding provinces are included in the warning for October 10–11, while the South remains affected throughout the four-day period.
October 10 risks extend from the North to the South
The TMD’s regional warning covers the North, lower Northeast, Central region including Bangkok and surrounding provinces, East and South.
The accompanying provincial forecast identifies very heavy rain risks in Kanchanaburi, Rayong, Chanthaburi, Trat, Songkhla, Yala and Narathiwat.
Heavy rain risks are forecast in:
North: Chiang Mai, Chiang Rai, Lamphun, Lampang, Phayao, Nan, Phrae, Sukhothai, Tak, Kamphaeng Phet and Phetchabun.
Northeast: Loei, Bueng Kan, Sakon Nakhon, Nakhon Phanom, Khon Kaen, Chaiyaphum, Nakhon Ratchasima, Buri Ram, Surin and Si Sa Ket.
Central region: Lop Buri, Saraburi, Nakhon Sawan, Chai Nat, Sing Buri, Ang Thong, Phra Nakhon Si Ayutthaya, Uthai Thani, Suphan Buri, Nakhon Pathom, Ratchaburi, Samut Sakhon and Samut Songkhram, including Bangkok and surrounding provinces.
East: Nakhon Nayok, Prachin Buri, Sa Kaeo, Chachoengsao and Chon Buri.
South: Phetchaburi, Prachuap Khiri Khan, Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, Pattani, Ranong, Phang Nga, Phuket, Krabi, Trang and Satun.
Bangkok remains under warning on October 11
The TMD’s warning for October 11 covers the lower North, Central region including Bangkok and surrounding provinces, East and South.
Very heavy rain risks are forecast in Ratchaburi, Samut Songkhram, Phetchaburi and Prachuap Khiri Khan.
Heavy rain risks are forecast in:
North: Kamphaeng Phet and Tak.
Central region: Uthai Thani, Chai Nat, Lop Buri, Saraburi, Sing Buri, Ang Thong, Phra Nakhon Si Ayutthaya, Suphan Buri, Kanchanaburi, Nakhon Pathom and Samut Sakhon, including Bangkok and surrounding provinces.
East: Nakhon Nayok, Chachoengsao, Chon Buri, Rayong, Chanthaburi and Trat.
South: Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Narathiwat, Ranong, Phang Nga, Phuket, Krabi, Trang and Satun.
Southern provinces face continued rain on October 12–13
The TMD forecasts heavy rain on October 12 in Phetchaburi, Prachuap Khiri Khan, Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala, Narathiwat, Ranong, Phang Nga, Krabi, Trang and Satun.
The heavy rain forecast for October 13 covers Surat Thani, Nakhon Si Thammarat, Songkhla, Yala, Narathiwat, Phang Nga, Phuket, Krabi, Trang and Satun.
Cold air and monsoon conditions drive unsettled weather
The TMD attributed the unsettled conditions to a high-pressure system, or cold air mass, from China extending over upper Thailand towards the end of the rainy season.
Easterly and southeasterly winds are carrying moisture from the South China Sea into the Northeast, East and Gulf of Thailand. Meanwhile, the southwest monsoon continues over the Andaman Sea, with a monsoon trough extending across the South.
“People should beware of thundershowers, gusty winds, heavy to very heavy rain and accumulated rainfall, which may cause flash floods and sudden runoff, particularly on foothill slopes near waterways and in low-lying areas where waterlogging may occur,” the department warned.
The TMD also advised people to avoid open spaces, large trees and insecure advertising signs during storms.
Waves may exceed 2 metres during thundershowers
The TMD warned that waves in the Andaman Sea and Gulf of Thailand could exceed 2 metres in areas experiencing thundershowers. Mariners should check their routes, navigate cautiously and avoid affected waters.
The department urged the public to plan travel and daily activities carefully and monitor further weather announcements. Information is available through the TMD website and around the clock on 1182, 02-399-4012 or 02-399-4013.
