Rain eases in upper Thailand with heavy rain forecast in southern areas
The November 8–9 forecast identifies provinces at risk of heavy rain, with flood precautions for residents and advice for mariners in the Andaman Sea and Gulf of Thailand.
- Rainfall is decreasing in upper Thailand, though some thundershowers are still possible.
- Southern Thailand is forecast to experience increased rainfall, with heavy to very heavy rain expected on Sunday, November 8, and Monday, November 9.
- Specific southern provinces, including Nakhon Si Thammarat, Songkhla, and Pattani, are expected to be particularly affected by very heavy rain.
- The weather change is caused by a strong cold air mass from China strengthening easterly winds over Thailand.
- Authorities have issued warnings for potential flash floods in the south and high waves in the Andaman Sea and Gulf of Thailand.
The Thai Meteorological Department has forecast increased rainfall across southern Thailand on Sunday (November 8, 2026) and Monday (November 9, 2026), with heavy rain in many areas and isolated very heavy rain.
Rainfall has decreased in upper Thailand, although thundershowers remain possible in some areas, particularly western parts of the northern and central regions.
People in these areas are advised to take precautions against thundershowers.
Another strong cold air mass from China is extending over upper Thailand and the South China Sea, causing easterly winds over Thailand and the Gulf of Thailand to strengthen.
Very heavy rain is forecast in Nakhon Si Thammarat, Songkhla and Pattani on both days.
Surat Thani, Phatthalung and Narathiwat are expected to have heavy rain on November 8 and very heavy rain on November 9.
Heavy rain is forecast on both days in Prachuap Khiri Khan, Chumphon, Yala, Trang and Satun.
Phetchaburi, Ranong, Phang Nga, Phuket and Krabi are also forecast to receive heavy rain on November 9.
Waves in the Andaman Sea and the Gulf of Thailand are expected to exceed 2 metres in areas with thundershowers.
Mariners should take extra care, check weather conditions and sailing routes before leaving shore, and avoid those areas.
People in areas at risk should closely follow the department’s announcements and be alert to accumulated rainfall that could trigger flash floods and rapid runoff from higher ground.
Particular caution is advised in low-lying areas, while flooded areas, waterways and foothill slopes should be avoided if heavy rain persists.
