The Thai Meteorological Department forecasts heavy rain in 49 provinces today, 19 September 2026. Bangkok can expect fairly widespread showers and isolated heavy rain, with lows and highs of 24-34°C. Very heavy rain is possible in Phang Nga, Ranong.
The monsoon trough move up to lying across the lower Central the upper South and the Eastern region while the rather strong southwest monsoon prevailing over the Andaman Sea, Thailand and the Gulf. Isolated heavy rains are forecast in the country while isolated very heavy rain are possible in the South (west coast) regions.
Bangkok
Fairly widespread thundershowers and isolated heavy rain. Minimum temperature 24-26°C. Maximum temperature 31-34°C. Southerly winds 10-25 km/h.
North
Scattered thundershowers and isolated heavy rain in Mae Hong Son, Chiang Mai, Lamphun, Lampang, Phrae, Tak, Sukhothai, Kamphaeng Phet, Phichit, Uttaradit, Phitsanulok and Phetchabun. Minimum temperature 23-25°C. Maximum temperature 31-35°C. Eastherly winds 10-20 km/h.
Northeast
Scattered thundershowers and isolated heavy rain in Nakhon Ratchasima and Buri Ram. Minimum temperature 23-24°C. Maximum temperature 32-34°C. Eastherly winds 10-20 km/h.
Central
Fairly widespread thundershowers and isolated heavy rain in Nakhon Sawan, Uthai Thani, Chai Nat, Lop Buri, Saraburi, Sing Buri, Ang Thong, Phra Nakhon Si Ayutthaya, Suphan Buri, Kanchanaburi, Ratchaburi, Nakhon Pathom, Samut Songkhram and Samut Sakhon. Minimum temperature 23-25°C. Maximum temperature 32-35°C. Southeasterly winds 10-25 km/h.
East
Fairly widespread thundershowers and isolated heavy rain in Chachoengsao, Chonburi, Rayong, Nakhon Nayok, Prachinburi, Sa Kaeo, Chanthaburi and Trat. Minimum temperature 23-25°C. Maximum temperature 30-35°C. Southwesterly winds 20-35 km/h. Wave height about 2 meters and above 2 meters in thundershowers.
South (east coast)
Scattered thundershowers and isolated heavy rain in Phetchaburi, Prachuap Khiri Khan, Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala and Narathiwat. Minimum temperature 23-26°C. Maximum temperature 30-34°C. From Surat Thani upward: southwesterly winds 20-35 km/h. Wave height 1-2 meters, about 2 meters offshore and above 2 meters in thundershowers. From Nakhon si Thammarat downward: southwesterly winds 15-35 km/h. Wave height about 1 meter, 1-2 meters offshore and above 2 meters in thundershowers.
South (west coast)
Fairly widespread thundershowers and isolated heavy rain in Phuket, Krabi, Trang and Satun. Isolated very heavy rain in Ranong and Phang Nga. Minimum temperature 23-25°C. Maximum temperature 28-31°C. From Phuket upward: southwesterly winds 20-40 km/h. Wave height 2-3 meters and above 3 meters in thundershowers. From Krabi downward: southwesterly winds 20-35 km/h. Wave height about 2 meters and above 2 meters in thundershowers.
Warnings
People should beware of heavy to very heavy rains and accumulation that may cause flash floods, overflows and landslides especially along the waterways near foothills and lowlands.
Source: Thai Meteorological Department daily forecast, announcement of 19 September 2026.
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