TMD advisory No. 5 puts South on alert for floods and landslides
Heavy rain could trigger flash floods and landslides in southern Thailand through November 13, while small boats in the lower Gulf should stay ashore.
- The Thai Meteorological Department issued Advisory No. 5, warning of heavy to very heavy rain in southern Thailand from November 10-13.
- The rainfall is expected to trigger flash floods, overflowing waterways, and landslides, particularly in low-lying areas and on foothill slopes.
- The advisory provides a day-by-day forecast identifying specific southern provinces at risk of heavy or very heavy rain during this period.
- A related warning advises small boats in the lower Gulf of Thailand to stay ashore due to strong winds and waves reaching 2-3 meters.
The Thai Meteorological Department (TMD) issued Weather Advisory No. 5 (303/2026) at 5pm on November 10, 2026, warning that isolated heavy to very heavy rain in southern Thailand through November 13 could trigger flash floods, overflowing waterways and landslides.
The department urged residents near waterways on foothill slopes and in low-lying areas to remain alert, as persistent rainfall could also generate rapid runoff.
Affected provinces from November 10–13
The TMD’s day-by-day forecast identifies provinces where some areas could experience heavy or very heavy rain.
Heavy rain is forecast on November 10 in Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala and Narathiwat.
Heavy rain is forecast on November 11 in Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung and Songkhla.
Very heavy rain is forecast on November 12 in Chumphon, Surat Thani and Nakhon Si Thammarat. Heavy rain is expected in Phatthalung, Songkhla, Pattani, Yala, Narathiwat, Ranong, Phuket, Krabi, Trang and Satun.
Very heavy rain is forecast on November 13 in Surat Thani and Nakhon Si Thammarat. Heavy rain is expected in Phetchaburi, Prachuap Khiri Khan, Chumphon, Phatthalung, Songkhla, Pattani, Yala, Narathiwat, Ranong, Phang Nga, Krabi, Trang and Satun.
Small boats advised to stay ashore in lower Gulf
Winds and waves in the Andaman Sea and the Gulf of Thailand are expected to strengthen. Waves in the lower Gulf are forecast to reach 2–3 metres and exceed 3 metres in thundershowers.
Mariners in both seas are advised to proceed with caution and avoid areas affected by thundershowers. Small boats in the lower Gulf should remain ashore during this period.
Cooler mornings and gusty winds in North
Upper Thailand is forecast to experience cooler mornings, falling temperatures and strong winds, while parts of the North could see thundershowers and gusty winds.
Residents in upper Thailand are advised to take care of their health as temperatures fall, while farmers should take precautions to protect crops from possible damage.
A relatively strong high-pressure system from China is extending over upper Thailand and the South China Sea. A westerly trough is expected to move across Myanmar and the North, while a moderate northeast monsoon prevails over the Gulf of Thailand, the South and the Andaman Sea.
Official updates available around the clock
The TMD urged the public to plan daily activities and travel carefully and to keep following official weather announcements.
Updates are available through the TMD website or by calling 02-399-4012, 02-399-4013 or 1182, available 24 hours a day.
The advisory was signed by Nattawut Dandee, deputy director-general serving as acting director-general of the Thai Meteorological Department. The next advisory is scheduled for 5am on November 11.
