TMD Issues 5-Day Heavy Rain Alert for Southern Thailand
The Thai Meteorological Department has issued a five-day heavy rain warning for Southern Thailand from November 18–22, with very heavy downpours expected across 14 provinces including Krabi, Surat Thani, and Nakhon Si Thammarat. Authorities warn of flash floods, mudslides, and dangerous sea conditions with waves up to three meters in the Gulf of Thailand and Andaman Sea. Residents and travelers are urged to monitor official updates and exercise caution in affected areas.
The Thai Meteorological Department issued Warning No. 1 for heavy to very heavy rain lasting five days, naming provinces at risk and warning of flash floods and mudslides. On November 15, 2026, the department announced heavy to very heavy rain for Southern Thailand (effective November 18–22, 2026), Warning No. 1 (309/2026). During November 18–22, Southern Thailand will have continuous rain with heavy rain in many areas and very heavy rain in some places. The public is warned of dangers from accumulated continuous rain, which may cause flash floods and mudslides, especially foothill areas near waterways and low-lying areas. Waves in the Gulf of Thailand and Andaman Sea will strengthen. The lower Gulf will have waves about two meters high; areas with thunderstorms will see waves over three meters. Mariners in the Gulf and Andaman should check routes, sail cautiously, and avoid thunderstorm areas. For upper Thailand, thunderstorms and strong gusts will occur in some areas initially, then the weather will turn cool with strong winds. The Northeast will see temperatures drop 2–4°C, while the North, Central, Bangkok metropolitan, and East will drop 1–3°C. The public should maintain health due to changing weather, and farmers should prevent damage to agricultural products. This is due to a moderately strong high-pressure system or cold air mass from China covering upper Thailand and the South China Sea, combined with the strengthening northeast monsoon covering the Gulf, South, and Andaman Sea. For safety and to reduce impacts, the public should plan daily life and travel carefully during this period. The public is urged to continuously monitor announcements from the Thai Meteorological Department at https://www.tmd.go.th or call 0-2399-4012-13 and 1182, available 24 hours. Announced November 15, 2026, at 05:00. The next announcement will be issued November 15, 2026, at 17:00. Provinces expected to be affected: November 18 – Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala, Narathiwat. November 19 – same six provinces. November 20 – Very heavy: Phatthalung, Songkhla, Pattani; Heavy: Nakhon Si Thammarat, Yala, Narathiwat, Trang, Satun. November 21 – Very heavy: Nakhon Si Thammarat, Phatthalung, Songkhla; Heavy: Chumphon, Surat Thani, Pattani, Yala, Narathiwat, Krabi, Trang, Satun. November 22 – Very heavy: Prachuap Khiri Khan, Chumphon, Surat Thani; Heavy: Nakhon Si Thammarat, Phatthalung, Songkhla, Ranong. Today's 24-hour forecast: Southern Thailand has heavy rain.
