Southern Thailand faces heavy rain as upper regions turn cooler

The Thai Meteorological Department has issued a warning of heavy to very heavy rain in southern Thailand and cool weather in upper Thailand, covering the period from Monday (November 9, 2026) to Friday (November 13).

It urged people in areas at risk to remain alert to accumulated rainfall, flash floods and mountain runoff, as well as unsettled weather in upper Thailand.

Weather conditions behind the warning

A fairly strong high-pressure system, or cold air mass, from China has spread over upper Thailand and the South China Sea, significantly strengthening the northeast monsoon over Thailand and the Gulf of Thailand.

The monsoon is bringing continued rainfall to the South, with heavy rain in many areas and very heavy rain in isolated locations. Meanwhile, temperatures in upper Thailand will continue to fall, accompanied by gusty winds.

Southern areas at risk of heavy to very heavy rain, November 9–13

People in southern Thailand, particularly those living near waterways at the foot of hills and in low-lying areas, should beware of accumulated rainfall that could trigger flash floods and mountain runoff.

The daily risk areas are as follows:

November 9

• Very heavy rain: Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani and Narathiwat.
• Heavy rain: Chumphon, Surat Thani, Yala, Krabi, Trang and Satun.

November 10

• Heavy rain: Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala, Narathiwat, Trang and Satun.

November 11

• Heavy rain: Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung and Songkhla.

November 12

• Very heavy rain: Chumphon, Surat Thani and Nakhon Si Thammarat.
• Heavy rain: Phatthalung, Songkhla, Pattani, Yala, Narathiwat, Ranong, Phuket, Krabi, Trang and Satun.

November 13

• Very heavy rain: Surat Thani and Nakhon Si Thammarat.
• Heavy rain: Phetchaburi, Prachuap Khiri Khan, Chumphon, Phatthalung, Songkhla, Pattani, Yala, Narathiwat, Ranong, Phang Nga, Krabi, Trang and Satun.

Warning for mariners and marine operators

Winds and waves in the Andaman Sea and the Gulf of Thailand are strengthening, with waves exceeding 2 metres in areas with thundershowers. Mariners in both waters should navigate with greater caution and avoid sailing through thundershowers to protect lives and property.

Temperatures to fall by 3–5°C in the North and Northeast

While heavy rain continues in the South, cold winds will bring cooler conditions to upper Thailand, where strong winds are also expected. Temperature decreases are forecast as follows:

North and Northeast: Temperatures will fall by 3–5°C.

Central region, Bangkok and its vicinity, and the East: Temperatures will fall by 1–3°C.

The department urged people in upper Thailand to take care of their health as the weather changes and temperatures fall rapidly. Farmers should prepare to protect agricultural produce from damage caused by strong winds and cooler conditions.

Precautions and preparations

People should take the following precautions to stay safe and reduce the effects of unsettled weather:

• Prepare for flooding: Move belongings to a higher level, clear drains around homes and closely monitor flood updates.
• Take care when travelling: Motorists in areas with heavy rain should reduce their speed, switch on their lights and avoid roads affected by standing floodwater or landslides.
• Protect health: People in areas with falling temperatures should wear warm clothing, especially children, older people and those with underlying health conditions.
• Protect agricultural produce: Secure crops or install windbreaks, and prepare shelters for domestic animals to protect them from gusty winds.

The public can follow the department’s announcements at tmd.go.th or seek further information through the helplines 0-2399-4012-13 and 1182, available 24 hours a day.