Bangkok faces thundershowers as heavy rain persists in southern areas

Southern Thailand is forecast to see less rain over the next 24 hours, although isolated heavy rain will persist, while parts of upper Thailand will continue to experience thundershowers, the Thai Meteorological Department stated in its forecast issued at 5pm on Friday (October 30, 2026).

Residents in affected areas should beware of thundershowers, heavy rain and accumulated rainfall that could trigger flash floods and sudden surges of water from higher ground, particularly on foothill slopes near waterways and in low-lying areas.

These conditions are being influenced by easterly winds over Thailand and the Gulf of Thailand, while a high-pressure system, or cold air mass, from China covers upper Thailand and the South China Sea.

Waves in the Andaman Sea and the Gulf of Thailand will exceed two metres in areas experiencing thundershowers.

Mariners should navigate with caution and avoid sailing through such areas.

Heavy rain, gusty winds and flash flood risks on November 2–6

The department forecasts more unsettled weather across Thailand from November 2 to 6, with thundershowers, gusty winds and isolated heavy rain.

People should beware of thundershowers and accumulated rainfall that could cause flash floods and sudden surges of water from higher ground.

Mariners should exercise extra caution and avoid areas with thundershowers throughout the period.

Updates from the department and local government agencies should also be followed closely.

Regional forecast from 6pm on Friday (October 30) to 6pm on Saturday (October 31)

North

• Thundershowers are forecast across 10% of the area, mainly in Tak, Kamphaeng Phet, Phichit and Phetchabun.
• Minimum temperatures will be 21–26°C and maximum temperatures 33–36°C, with easterly winds at 10–20km/h.

Northeast

• Thundershowers are forecast across 20% of the area, mainly in Bueng Kan, Nakhon Phanom, Chaiyaphum, Nakhon Ratchasima, Buri Ram, Surin, Si Sa Ket and Ubon Ratchathani.
• Minimum temperatures will be 23–24°C and maximum temperatures 33–34°C, with northeasterly winds at 10–25km/h.

Central region

• Thundershowers are forecast across 40% of the area, mainly in Kanchanaburi, Ratchaburi, Suphanburi, Phra Nakhon Si Ayutthaya, Lopburi, Saraburi, Nakhon Pathom, Samut Sakhon and Samut Songkhram.
• Minimum temperatures will be 23–27°C and maximum temperatures 33–35°C, with easterly winds at 10–20km/h.

Bangkok and surrounding areas

• Thundershowers are forecast across 60% of the area.
• Minimum temperatures will be 26–27°C and maximum temperatures 33–35°C, with easterly winds at 10–20km/h.

East

• Thundershowers are forecast across 40% of the area, mainly in Chachoengsao, Sa Kaeo, Chon Buri, Rayong, Chanthaburi and Trat.
• Minimum temperatures will be 24–25°C and maximum temperatures 33–35°C, with easterly winds at 10–30km/h.
• Waves will be below one metre, rising above two metres in thundershowers.

South — east coast

• Thundershowers are forecast across 60% of the area, with isolated heavy rain in Phetchaburi, Prachuap Khiri Khan, Chumphon, Surat Thani and Nakhon Si Thammarat.
• Minimum temperatures will be 22–24°C and maximum temperatures 31–34°C.
• From Surat Thani northwards: Easterly winds at 15–35km/h, with waves of 1–2 metres and above two metres in thundershowers.
• From Nakhon Si Thammarat southwards: Southeasterly winds at 15–30km/h, with waves around one metre and above two metres in thundershowers.

South — west coast

• Thundershowers are forecast across 60% of the area, mainly in Ranong, Phang Nga, Phuket, Krabi and Trang.
• Minimum temperatures will be 24–25°C and maximum temperatures 33–35°C, with easterly winds at 15–35km/h.
• Waves will be around one metre, reaching 1–2 metres offshore and exceeding two metres in thundershowers.