Storm Maysak Brings Heavy Rains to Four Thai Regions
Tropical storm Maysak brings heavy to very heavy rainfall across Thailand's northern, northeastern, and eastern regions through July 5, with authorities warning of potential flash floods in low-lying and hillside areas.
On July 4, 2025, Thailand's Meteorological Department forecasted heavy rainfall in some areas over the next 24 hours, with very heavy rain in parts of the upper North, upper Northeast, and East regions. A monsoon trough is passing through the upper North and northern Laos, moving into tropical storm Maysak, while a strong southwest monsoon covers the Andaman Sea, Thailand, and the Gulf of Thailand. The public is urged to be cautious of heavy to very heavy rainfall and accumulated precipitation, which may cause flash floods and flash flooding, especially in hillside and low-lying areas near water sources.
Waves in the upper Andaman Sea are moderately strong, with heights of 2-3 meters, exceeding 3 meters in thunderstorm areas. The lower Andaman Sea and upper Gulf of Thailand have waves around 2 meters, exceeding 2 meters in thunderstorm zones. Fishermen are advised to navigate carefully and avoid thunderstorm areas. Small boats in the upper Andaman Sea should remain ashore.
Weather forecast for Thailand from 6:00 PM today to 6:00 PM tomorrow:
North: 70% thunderstorms with heavy rain in Mae Hong Son, Chiang Mai, Tak, Kamphaeng Phet, Uttaradit, Phitsanulok, and Phetchabun; very heavy rain in Chiang Rai, Phayao, and Nan. Low 23-26°C, high 31-34°C. Southwest winds 10-20 km/h.
Northeast: 70% thunderstorms with heavy rain in Loei, Nong Bua Lamphu, Udon Thani, Sakon Nakhon, Mukdahan, Amnat Charoen, and Ubon Ratchathani; very heavy rain in Nong Khai, Bueng Kan, and Nakhon Phanom. Low 23-26°C, high 30-34°C. Southwest winds 10-20 km/h.
Central: 70% thunderstorms with some heavy rain in Nakhon Sawan, Uthai Thani, Kanchanaburi, and Ratchaburi. Low 22-27°C, high 34-36°C. Southwest winds 10-25 km/h.
East: 70% thunderstorms with heavy rain in Chachoengsao, Chon Buri, and Rayong; very heavy rain in Chanthaburi and Trat. Low 24-28°C, high 30-33°C. Southwest winds 20-35 km/h. Waves around 2 meters, exceeding 2 meters in thunderstorm areas.
South (East Coast): 30% thunderstorms with some heavy rain in Phetchaburi and Prachuap Khiri Khan. Low 23-25°C, high 32-35°C. From Surat Thani upward: southwest winds 20-35 km/h, waves 1-2 meters, exceeding 2 meters in thunderstorms. From Nakhon Si Thammarat downward: southwest winds 15-30 km/h, waves around 1 meter, exceeding 2 meters in thunderstorms.
South (West Coast): 30% thunderstorms, mainly in Ranong and Phang Nga. Low 23-27°C, high 30-34°C.
