Seasonal downpour to drench Thailand, flooding expected
Heavy rain will affect most Thai provinces, including most parts of Bangkok

Weather conditions across Thailand are expected to deteriorate, with increased rainfall predicted for 73 provinces. Heavy to very heavy rain may lead to flash floods, forest runoff, and landslides. Residents are advised to avoid flood-prone areas, especially in Bangkok, where 70% of the area is at risk as of today.
Thailand is forecast to experience significant rainfall in the north, northeast, central, east, and southern western regions. Residents are urged to be cautious of the potential hazards posed by heavy and persistent rain, which can result in flash floods, landslides, and forest runoff. Areas near mountain slopes, waterways, and low-lying regions should be avoided, particularly during thunderstorms or in areas with recurrent flooding.
Farmers are advised to enhance drainage systems on their farms to protect agricultural products and livestock. The increased rainfall is attributed to a monsoon trough over northern Thailand and a strengthened southwest monsoon covering the Andaman Sea, Thailand, and the Gulf of Thailand.
In the Andaman Sea, waves are expected to strengthen, with heights of about 2 metres in the upper part and 1 to 2 metres in the lower part. In areas with thunderstorms, waves may exceed 2 metres. Mariners in the Gulf of Thailand and the Andaman Sea should exercise caution and avoid sailing in stormy areas. Small boats in the upper Andaman Sea are advised to remain ashore.
Weather forecast
In the north, thunderstorms are expected in 80% of the area, with heavy to very heavy rain in some provinces, including Mae Hong Son, Chiang Rai, Chiang Mai, Lamphun, Lampang, Phayao, Phrae, Nan, Uttaradit, Sukhothai, Tak, Kamphaeng Phet, Phitsanulok, Phichit, and Phetchabun. Temperatures are expected to range from 24 to 27°C, with a high of 32 to 36°C, and southwesterly winds at 5-15 km/h.
In the northeast, 70% of the area will experience thunderstorms, with heavy to very heavy rain in certain provinces such as Loei, Nong Khai, Bueng Kan, Nong Bua Lamphu, Udon Thani, Sakon Nakhon, Nakhon Phanom, Chaiyaphum, Khon Kaen, Kalasin, Mukdahan, Maha Sarakham, Roi Et, Yasothon, Amnat Charoen, Nakhon Ratchasima, Buriram, Surin, Sisaket, and Ubon Ratchathani. Temperatures will be between 23 and 26°C, with highs of 32 to 35°C, and southwesterly winds of 10-20 km/h.
In the central region, 70% of the area will see thunderstorms, with heavy to very heavy rain in some areas, including Nakhon Sawan, Uthai Thani, Chai Nat, Sing Buri, Lop Buri, Ang Thong, Saraburi, Suphan Buri, Ayutthaya, Kanchanaburi, Ratchaburi, Nakhon Pathom, Samut Songkhram, and Samut Sakhon. Temperatures will range from 23 to 26°C, with highs of 34 to 36°C, and southwesterly winds at 10-20 km/h.

In the east, thunderstorms will affect 70% of the area, with heavy to very heavy rain expected in provinces such as Nakhon Nayok, Sa Kaeo, Prachin Buri, Chachoengsao, Chon Buri, Rayong, Chanthaburi, and Trat. Temperatures will range from 24 to 27°C, with highs of 31-34°C, and southwesterly winds of 15-30 km/h. Waves in the sea may reach about 1 metre, exceeding 2 metres in stormy areas.
In the southern east region, 70% of the area will experience thunderstorms, with heavy rain in some provinces, including Phetchaburi, Prachuap Khiri Khan, Chumphon, Surat Thani, Nakhon Si Thammarat, and Phatthalung. Temperatures will range from 24 to 26°C, with highs of 33-34°C, and southwesterly winds of 15-30 km/h. Waves may reach about 1 metre, exceeding 2 metres in stormy areas.
In the southern west, 80% of the area will see thunderstorms, with heavy to very heavy rain in certain provinces like Ranong, Phang Nga, Phuket, Krabi, Trang, and Satun. Temperatures are expected to range from 24 to 25°C, with highs of 28-33°C. From Phuket upwards, southwesterly winds of 20-35 km/h are expected, with waves around 2 metres, exceeding 2 metres in stormy areas. From Krabi downwards, southwesterly winds of 15-35 km/h are expected, with waves of 1-2 metres, exceeding 2 metres in stormy areas, reported KhaoSod.
In Bangkok and its vicinity, thunderstorms will affect 70% of the area, with heavy rain expected in some areas. Temperatures will range from 25 to 27°C, with highs of 33-36°C.
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