TMD warns Thailand of five days of heavy rain from Oct 9
Bangkok is included in Thailand’s October 10–11 weather warning, with gusty winds and hail possible as southern provinces face continued rain
- The Thai Meteorological Department (TMD) has issued a warning for heavy to very heavy rain, thundershowers, and gusty winds in parts of Thailand from October 9 to 13.
- The warning affects different regions on specific days, with Bangkok included on October 10–11 and the South impacted throughout the entire five-day period.
- The severe weather is caused by a high-pressure system from China extending over the region, which will push a monsoon trough southwards.
- Authorities have alerted the public to the risk of flash floods and rapid run-off, and warned that waves in the Andaman Sea and Gulf of Thailand could exceed 2 meters during storms.
The Thai Meteorological Department (TMD) issued a five-day warning on October 8, 2026, forecasting thundershowers, gusty winds, hail and isolated heavy to very heavy rain in parts of Thailand during October 9–13. The TMD’s Warning No. 3 (249/2026), issued at 5am on October 8.
Bangkok included in October 10–11 warning
Bangkok and surrounding provinces are included in the TMD’s warning for October 10–11, while the South features throughout the five-day period. The warning identifies the affected regions as follows:
- October 9: Lower Northeast, East and South.
- October 10: Lower North, lower Northeast, Central region including Bangkok and surrounding provinces, East and South.
- October 11: Lower North, Central region including Bangkok and surrounding provinces, East and South.
- October 12: South.
- October 13: South.
The TMD expects another high-pressure system, or cold air mass, from China to extend over the Northeast and South China Sea, bringing increased rainfall to central, eastern and southern Thailand during October 9–13. The system is forecast to push the monsoon trough southwards across the East and upper South, while a moderate southwest monsoon covers the Andaman Sea, Thailand and Gulf of Thailand.
TMD warns of flash floods and waves above 2 metres
The TMD warned that heavy and accumulated rainfall could trigger flash floods and rapid run-off, particularly on foothill slopes near waterways and in low-lying areas, where standing floodwater could also develop. Waves in the Andaman Sea and Gulf of Thailand could exceed 2 metres during thundershowers. People in affected areas should avoid open spaces, large trees and unstable billboards during unsettled weather, the TMD advised. Residents should also plan daily activities and travel carefully during the warning period.
The TMD urged mariners in the Andaman Sea and Gulf of Thailand to check their routes, navigate cautiously and avoid areas experiencing thundershowers.
Southern Thailand faces isolated heavy rain on October 8
The TMD’s October 8 daily forecast predicts isolated heavy rain in the South as rainfall decreases in upper Thailand. Remaining thundershowers in upper Thailand are expected mainly in western parts of the North and Central region and the lower East.
A high-pressure system covers upper Thailand, while easterly winds prevail over the Gulf of Thailand and the South, according to the TMD.
The TMD’s regional forecast covers 6am on October 8 to 6am on October 9, Thailand time, naming 29 provinces alongside Bangkok and surrounding areas:
North: Thundershowers across 20% of the region, mainly in Mae Hong Son, Chiang Mai, Tak, Kamphaeng Phet, Phitsanulok, Phichit and Phetchabun. Minimum temperatures of 20–26°C and maximums of 33–35°C, with easterly winds at 10–20km/h.
Northeast: Rain across 10% of the region, mainly in Loei, Chaiyaphum, Nakhon Ratchasima and Ubon Ratchathani. Minimum temperatures of 20–24°C and maximums of 31–34°C, with northeasterly winds at 10–25km/h.
Central region: Thundershowers across 30% of the region, mainly in Uthai Thani, Kanchanaburi, Ratchaburi, Nakhon Pathom, Samut Sakhon and Samut Songkhram. Minimum temperatures of 22–25°C and maximums of 32–35°C, with easterly winds at 10–20km/h.
East: Thundershowers across 30% of the region, mainly in Chon Buri, Rayong, Chanthaburi and Trat. Minimum temperatures of 23–25°C and maximums of 32–35°C, with northeasterly winds at 10–30km/h. Waves below 1 metre, rising above 2 metres during thundershowers.
South, east coast: Thundershowers across 70% of the region, with isolated heavy rain in Chumphon, Surat Thani, Nakhon Si Thammarat, Songkhla, Yala and Narathiwat. Minimum temperatures of 23–25°C and maximums of 32–34°C, with easterly winds at 10–30km/h. Waves below 1 metre, rising above 2 metres during thundershowers.
South, west coast: Thundershowers across 60% of the region, with isolated heavy rain in Ranong and Phang Nga. Minimum temperatures of 23–25°C and maximums of 31–35°C, with northwesterly winds at 15–30km/h. Waves around 1 metre, rising above 2 metres during thundershowers.
Bangkok and surrounding provinces: Thundershowers across 30% of the area. Minimum temperatures of 24–26°C and maximums of 33–35°C, with northeasterly winds at 10–20km/h.
The TMD provides weather information through its website and the telephone numbers 02-399-4012, 02-399-4013 and 1182 around the clock. The next warning bulletin was scheduled for 5pm on October 8.
