Heavy rain forecast across Thailand as authorities monitor flood risks

BANGKOK — 6 October 2026, Thailand’s Joint Information Coordination Center (JICC) has warned of widespread moderate to heavy rain from 10–13 October, urging people in flood-prone areas to closely monitor weather and water levels, particularly in the eastern provinces where the Bang Pakong River is at risk of overflowing its flood barriers.

JICC spokesperson Ekkaphop Phianphiset said on 6 October that rain from 5–7 October would be associated with the seasonal transition. Northern Thailand is expected to experience cooler weather, while residents in mountainous areas have been advised to watch for possible landslides.

Rain is expected to move from the Central Plains toward the western region and then southward. Heavier rainfall is forecast in Nakhon Si Thammarat, Songkhla and provinces along the Andaman coast.

Rain in the Central and Northeastern regions is expected to ease before returning from 10–13 October. The western side of the country, including Kanchanaburi, Phetchaburi, Ratchaburi, Samut Songkhram and Samut Sakhon, is expected to receive more rain during the period, while southern provinces will continue to experience rainfall. Residents have been urged to closely follow official warnings.

Water levels in the Chao Phraya River basin and northern runoff are now declining. At Nakhon Sawan, water flowing toward the Chao Phraya Dam has already passed its peak. The dam is maintaining its discharge rate at 2,500 cubic meters per second, while its water level has fallen from 17.3 meters yesterday to 16.88 meters. Authorities are aiming to reduce the level to 16.5 meters to create additional capacity for incoming rainfall and northern runoff.

Water levels in the Sakae Krang River, which adds water upstream of the Chao Phraya Dam, are also declining. Meanwhile, Pasak Jolasid Dam has reached full capacity and is accelerating releases toward Rama VI Dam. Phra Nakhon Si Ayutthaya is serving as a receiving area and has been affected by the increased flow, although water levels there are currently stable and the discharge remains slow.

The Chao Phraya River remains considerably below flood barriers, particularly in Bangkok, where water levels are still more than 1 meter below the barriers.

In the Mae Klong River basin, Vajiralongkorn Dam is currently 98% full, while Srinagarind Dam is 90% full. Authorities are preparing to release more water than they receive, particularly at Vajiralongkorn Dam, to create capacity for additional rainfall.

Kaeng Krachan Dam in Phetchaburi has reached full capacity and is accelerating water releases to prepare for additional rainfall. Residents in Khao Krapuk subdistrict in Tha Yang district, as well as Mueang Phetchaburi and Nong Ya Plong districts, have been urged to closely monitor provincial warnings.

In eastern Thailand, water levels in Prachin Buri are declining slowly. In Kabin Buri district, water remains above the riverbanks and is gradually flowing toward Mueang Prachin Buri. Another flow is moving from Nakhon Nayok, where authorities are managing water releases from Khun Dan Prakan Chon Dam to minimize impacts on communities.

Eight districts in Chachoengsao province have been placed under close watch as authorities monitor the situation and prepare for potential flooding linked to rising water levels in the Bang Pakong River.

Authorities are urging residents in affected and at-risk areas to follow local announcements and prepare for possible changes in rainfall and water levels over the coming days.