Thailand’s Meteorological Department forecasts rain in 70% of southern region on Oct. 12

THAILAND (SOUTHERN COASTAL REGIONS, INCLUDING PHATTHALUNG, SONGKHLA, YALA, NARATHIWAT, NAKHON SI THAMMARAT, PHUKET, KRABI, TRANG, SATUN), 12 OCTOBER 2026 —

The Thai Meteorological Department (TMD) issued a 24‑hour weather forecast on 12 October 2026 that warned of widespread thundershowers across Thailand, with the highest probability of heavy rain over 70 % of the southern coastal regions.

The TMD said the forecast is significant because the accumulated rainfall could trigger flash floods and sudden runoff, especially in communities situated near foothills, waterways and low‑lying land. The department urged residents in southern Thailand to remain alert to heavy rain and to take precautions against floodwater that could collect in low‑lying communities.

According to the TMD, a high‑pressure system or cold air mass from China is covering upper Thailand and the South China Sea, bringing easterly winds over the Gulf of Thailand. A monsoon trough is also lying across the lower South. The TMD forecast thundershowers in every region of Thailand during 12–13 October, with coverage ranging from 20 % in the North and Northeast to 70 % in both southern coastal regions.

The regional outlook is as follows:

In the North, thundershowers are expected over 20 % of the region, mainly in Mae Hong Son, Chiang Mai, Tak, Kamphaeng Phet, Phitsanulok and Phichit. Minimum temperatures will be 20–25 °C and maximums 32–34 °C, with easterly winds at 10–20 km h⁻¹. In the Northeast, thundershowers are forecast over 20 % of the region, mainly in Nakhon Ratchasima, Buri Ram, Surin, Si Sa Ket and Ubon Ratchathani.

Minimum temperatures will be 20–24 °C and maximums 32–35 °C, with northeasterly winds at 10–25 km h⁻¹. The Central region will see thundershowers over 30 % of the area, mainly in Kanchanaburi, Ratchaburi, Nakhon Pathom, Samut Sakhon and Samut Songkhram. Minimum temperatures will be 22–25 °C and maximums 30–34 °C, with northeasterly winds at 10–20 km h⁻¹. The East will experience thundershowers over 30 % of the region, mainly in Chonburi, Rayong, Chanthaburi and Trat.

Minimum temperatures will be 23–26 °C and maximums 32–35 °C, with northeasterly winds at 10–30 km h⁻¹. Waves will be below one metre, rising above two metres in thundershowers.

The South, east coast, will have thundershowers over 70 % of the region, with isolated heavy rain in Phatthalung, Songkhla, Yala, Narathiwat and Nakhon Si Thammarat. Minimum temperatures will be 21–25 °C and maximums 30–35 °C, with variable winds at 10–30 km h⁻¹. Waves will be below one metre, rising above two metres in thundershowers.

The South, west coast, will also see thundershowers over 70 % of the region, with isolated heavy rain in Phuket, Krabi, Trang and Satun. Minimum temperatures will be 23–25 °C and maximums 32–34 °C, with variable winds at 15–30 km h⁻¹. Waves will be around one metre, rising above two metres in thundershowers.

Bangkok and surrounding areas will experience thundershowers over 30 % of the area. Minimum temperatures will be 25–27 °C and maximums 33–35 °C, with northeasterly winds at 10–20 km h⁻¹. The TMD warned that waves in the Andaman Sea and Gulf of Thailand could exceed two metres in areas affected by thundershowers. Boat operators should proceed cautiously and avoid sailing through thundershowers.