TMD forecasts 70% rain coverage in Bangkok on October 13–14
Bangkok and nearby provinces face heavy rain and flash-flood risks, while storm waves in the Andaman Sea and Gulf of Thailand could exceed 2 metres.
- The Thai Meteorological Department (TMD) has forecast thundershowers over 70% of Bangkok and its surrounding areas.
- This forecast is for the 24-hour period from 6 pm on October 13 to 6 pm on October 14, 2026.
- The TMD also warned of isolated heavy rain, which could trigger flash floods and runoff in low-lying areas.
The Thai Meteorological Department (TMD) has warned of isolated heavy rain and flash-flood risks in parts of Thailand, with thundershowers forecast over 70% of Bangkok and nearby areas. The forecast, issued at 5pm on October 13, 2026, covers the period from 6pm that day until 6pm on October 14, Thai time.
The TMD identified the lower Central region, including Bangkok and its vicinity, the East and the upper South as areas of particular concern. Heavy and accumulated rainfall could trigger flash floods and runoff, especially along waterways near foothills and in low-lying areas.
Easterly winds bring moisture into upper Thailand
A high-pressure system, or cool air mass, from China continues to cover northeastern Thailand and the South China Sea, according to the TMD. The system is driving easterly and southeasterly winds that carry moisture from the South China Sea and the Gulf of Thailand into upper Thailand.
Regional thundershower coverage ranges from 40% to 70%
Thundershower coverage ranges from 40% to 70% in the TMD’s regional outlook for the 24 hours ending at 6pm on October 14. The regional forecasts are as follows:
North: Thundershowers are forecast over 40% of the region, with isolated heavy rain in Tak and Kamphaeng Phet. Minimum temperatures are expected at 21–25°C and maximum temperatures at 33–36°C, with easterly winds of 10–20 km/h.
Northeast: Thundershowers are forecast over 40% of the region, mainly in Loei, Nong Bua Lamphu, Chaiyaphum, Khon Kaen, Nakhon Ratchasima, Buri Ram, Surin, Si Sa Ket and Ubon Ratchathani. Minimum temperatures are expected at 21–25°C and maximum temperatures at 32–34°C, with northeasterly winds of 10–25 km/h.
Central region: Thundershowers are forecast over 70% of the region, with isolated heavy rain in Nakhon Sawan, Uthai Thani, Chai Nat, Suphan Buri, Kanchanaburi, Ratchaburi, Nakhon Pathom, Samut Sakhon and Samut Songkhram. Minimum temperatures are expected at 22–25°C and maximum temperatures at 34–36°C, with easterly winds of 10–20 km/h.
Bangkok and vicinity: Thundershowers are forecast over 70% of the area, with isolated heavy rain. Minimum temperatures are expected at 23–25°C and maximum temperatures at 33–35°C, with easterly winds of 10–20 km/h.
East: Thundershowers are forecast over 70% of the region, with isolated heavy rain in Chachoengsao, Chon Buri, Rayong, Chanthaburi and Trat. Minimum temperatures are expected at 23–25°C and maximum temperatures at 32–34°C, with easterly winds of 10–30 km/h. Waves are forecast below 1 metre, rising above 2 metres in thunderstorms.
South, east coast: Thundershowers are forecast over 60% of the area, with isolated heavy rain in Phetchaburi, Prachuap Khiri Khan, Chumphon and Surat Thani. Minimum temperatures are expected at 22–25°C and maximum temperatures at 32–35°C, with easterly winds of 15–30 km/h. Waves are forecast at around 1 metre, rising above 2 metres in thunderstorms.
South, west coast: Thundershowers are forecast over 60% of the area, with isolated heavy rain in Phang Nga and Krabi. Minimum temperatures are expected at 23–25°C and maximum temperatures at 31–35°C, with easterly winds of 15–30 km/h. Waves are forecast at around 1 metre, rising above 2 metres in thunderstorms.
Storm waves could exceed 2 metres in the Andaman Sea and Gulf
Waves in the Andaman Sea and the Gulf of Thailand are forecast to exceed 2 metres in areas experiencing thunderstorms, the TMD said. Mariners should check their planned routes, navigate cautiously and avoid sailing through thunderstorms.
