TMD forecasts heavy to very heavy rain in South and 3–5°C drop in Northeast for 9–13 November
Southern Thailand faces flash-flood risks from 9–13 November, with waves exceeding 2 metres in thundershowers in the Gulf of Thailand and Andaman Sea.
- Heavy to very heavy rain is forecast for southern Thailand from November 9-13, bringing a risk of flash floods and runoff in low-lying areas.
- The Northeast is expected to experience a temperature drop of 3–5°C during the same period, with a smaller 1–3°C drop in the North, Central, and Eastern regions.
- These weather conditions are caused by a strong high-pressure system from China spreading over upper Thailand, which strengthens easterly winds.
The Thai Meteorological Department (TMD) issued a warning on Monday (November 9, 2026), forecasting heavy to very heavy rain in parts of southern Thailand from 9–13 November, alongside cooler weather and strong winds across upper Thailand.
The TMD’s advisory, issued at 5am Thai time, forecasts continued rain across the South, with heavy falls in many areas and isolated very heavy rain.
Accumulated rainfall could trigger flash floods and rapid runoff, particularly on foothill slopes near waterways and in low-lying areas, according to the TMD.
A relatively strong high-pressure system, or cold air mass, from China is expected to spread over upper Thailand and the South China Sea, strengthening easterly winds across Thailand and the Gulf of Thailand, the TMD explained.
Southern provinces face heavy to very heavy rain through November 13
The TMD’s daily outlook identifies the following rainfall risk areas:
- Monday 9 November: The TMD forecasts very heavy rain in Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani and Narathiwat. Heavy rain is expected in Chumphon, Surat Thani, Yala, Krabi, Trang and Satun.
- Tuesday 10 November: The TMD forecasts heavy rain in Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala and Narathiwat.
- Wednesday 11 November: The TMD forecasts heavy rain in Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung and Songkhla.
- Thursday 12 November: The TMD forecasts very heavy rain in Chumphon, Surat Thani and Nakhon Si Thammarat. Heavy rain is expected in Phatthalung, Songkhla, Pattani, Yala, Narathiwat, Ranong, Phuket, Krabi, Trang and Satun.
- Friday 13 November: The TMD forecasts very heavy rain 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.
Northeast temperatures forecast to fall by 3–5°C
The TMD forecasts a temperature drop of 3–5°C in the Northeast over 9–13 November. Temperatures in the North, Central region, Bangkok and surrounding areas, and East are expected to fall by 1–3°C.
People across upper Thailand should take care of their health as the weather turns colder and strong winds develop, while farmers should protect agricultural produce against possible damage, the TMD advised.
Waves forecast to exceed 2 metres in thundershowers
Waves in the Gulf of Thailand and Andaman Sea are expected to exceed 2 metres in areas with thundershowers, according to the TMD. Mariners on both coasts should navigate cautiously and avoid sailing through those areas.
The TMD urged residents to plan daily activities and travel carefully and follow further weather announcements. The next advisory is scheduled for 5pm on November 9.
Weather information is available through the TMD’s website and official Facebook page, with round-the-clock enquiries available on 1182, 02-399-4012 and 02-399-4013.
