The Thai Meteorological Department forecasts heavy rain in 15 provinces today, 21 October 2026. Bangkok can expect isolated showers with gust, with lows and highs of 26-35°C.
The monsoon trough lies across the Gulf and the middle South while the high-pressure system from China covers the upper North, the upper Northeast of Thailand and the South China Sea leading to the southeasterly wind bring the moisture from the South China Sea and the Gulf to the lower Northeast, the lower Central region including Bangkok and vicinity and the East. Continuous rain with isolated heavy rain are forecat in the South while isolated thundershower with gust are likely in the upper country.
Bangkok
Isolated thundershowers with gust. Minimum temperature 26-27°C. Maximum temperature 33-35°C. Southeasterly wind 10-20 km/h.
North
Isolated thundershowers mostly in Phitsanulok, Phetchabun, and Phichit. Minimum temperature 21-25°C. Maximum temperature 34-36°C. Easterly wind 10-20 km/h.
Northeast
Isolated thundershowers with gust mostly in Nakhon Ratchasima, Buriram, Surin, Si Sa Ket and Ubon Ratchathani. Minimum temperature 23-24°C. Maximum temperature 34-35°C. Northeasterly wind 10-20 km/h.
Central
Isolated thundershowers with gust mostly in Phra Nakhon Si Ayutthaya, Suphan Buri, Kanchanaburi, Ratchaburi, Nakhon Pathom, Samut Sakhon and Samut Songkhram. Minimum temperature 23-26°C. Maximum temperature 32-36°C. Easterly wind 10-20 km/h.
East
Isolated thundershowers with gust mostly in Nakhon Nayok, Prachin Buri, Chachoengsao, Chon Buri, Rayong, Chanthaburi, and Trat. Minimum temperature 23-26°C. Maximum temperature 32-35°C. Southeasterly wind 10-30 km/h. Waves below 1 meter and above 2 meters in thundershowers.
South (east coast)
Scattered thundershowers and isolated heavy rain In Prachuap Khiri Khan, Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala, and Narathiwat. Minimum temperature 22-25°C. Maximum temperature 30-35°C. Surat Thani upward: Easterly wind 15-30 km/h. Nakhon Si Thammarat downward: Southeasterly wind 15-30 km/h. Wave height about 1 meter and above 2 meters in thundershowers.
South (west coast)
Scattered thundershowers and isolated heavy rain in Ranong, Phang Nga, Phuket, Krabi, Trang, and Satun. Minimum temperature 24-25°C. Maximum temperature 33-35°C. Ranong upward: Easterly wind 15-30 km/h. Phang Nga downward: Southwesterly wind 15-30 km/h. Wave height about 1 meter and above 2 meters in thundershowers.
Source: Thai Meteorological Department daily forecast, announcement of 21 October 2026.
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