Heavy to very heavy rains strike southern Thailand today, May 12, 2026, driven by strengthening easterly winds over the Gulf of Thailand. Bangkok and surrounding areas face a 60% chance of thunderstorms.
Key Weather Warnings
Flash floods and landslides pose risks, especially in hilly terrains near waterways and lowlands due to accumulated rainfall. In the Gulf of Thailand, waves measure about 1 meter, surging over 2 meters during thunderstorms. Mariners must avoid these zones.
Upper Thailand experiences hot daytime conditions with scattered thunderstorms, gusty winds, and isolated heavy downpours in northern and eastern regions. Southerly and southeasterly winds carry moisture from the Gulf of Thailand and South China Sea.
Farmers should brace fruit trees, safeguard crops and livestock, and watch for health issues in shifting weather patterns. Air quality remains fair with low dust and haze levels thanks to recent showers.
24-Hour Regional Forecast (Until 6:00 AM Tomorrow)
Northern Thailand
Hot afternoons yield to 60% thunderstorm coverage, gusty winds, and heavy rain in Mae Hong Son, Chiang Mai, Chiang Rai, Lamphun, Lampang, Phayao, Nan, Tak, Sukhothai, Kamphaeng Phet, Phichit, and Phetchabun. Lows: 21-26°C. Highs: 32-37°C. Southeast winds at 10-15 km/h.
Northeastern Thailand
Hot days with 10% thunderstorms, mainly in Loei, Nong Khai, Chaiyaphum, Nakhon Ratchasima, Buriram, and Surin. Lows: 23-27°C. Highs: 35-37°C. Easterly winds at 10-20 km/h.
Central Thailand
Hot conditions with 40% thunderstorms and gusts in Nakhon Sawan, Uthai Thani, Lopburi, Saraburi, Suphan Buri, Ayutthaya, Kanchanaburi, Ratchaburi, and Nakhon Pathom. Lows: 24-26°C. Highs: 35-38°C. Southeast winds at 10-20 km/h.
Eastern Thailand
Hot weather brings 40% thunderstorms and heavy rain in Nakhon Nayok, Chachoengsao, Chonburi, Rayong, Chanthaburi, and Trat. Lows: 23-26°C. Highs: 32-37°C. Southeast winds at 15-30 km/h. Waves: 1 meter, over 2 meters in storms.
Southern Thailand (East Coast)
60% thunderstorms with heavy to very heavy rain in Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala, and Narathiwat. Lows: 23-26°C. Highs: 32-36°C. Southeast winds at 15-30 km/h. Waves: 1 meter, over 2 meters in storms.
Southern Thailand (West Coast)
60% thunderstorms and heavy rain in Ranong, Krabi, Trang, and Satun. Lows: 23-26°C. Highs: 33-35°C. Easterly winds at 10-30 km/h. Waves: under 1 meter, over 2 meters in storms.
Bangkok and Vicinity
Hot days with 60% thunderstorms and gusty winds. Lows: 26-27°C. Highs: 35-37°C. Southeast winds at 10-20 km/h.
