Rivers of Thailand

Basin Mae Klong

Khwae Noi River

แม่น้ำแควน้อย

Rises in the Tenasserim Hills in Sangkhla Buri district and is dammed by the Vajiralongkorn Dam. It joins the Khwae Yai River at Kanchanaburi town to form the Mae Klong River.

Map of the Khwae Noi RiverKanchanaburiVajiralongkorn Dam
The dark line is this river; the mid-blue lines are its named tributaries.

Key facts

Length
about 250 kmMeasured along the river on this map; official figures can differ with the method used
Source
Kanchanaburi province
Flows into
Mae Klong River, Kanchanaburi province
Provinces (1)
Kanchanaburi
Dams on the river
Vajiralongkorn Dam

Khwae Noi River water level today

17 automatic gauging stations on this river, highest water relative to the bank first. As of 15 Nov 2026, 04:30

StationLocationLevel (m MSL)Of bank-fullStatusMeasured
บ้านแสนตอMueang Uttaradit District, Uttaradit67.4381%High15 Nov 2026, 04:00
บ้านปากแซงSai Yok District, Kanchanaburi42.7567%Normal14 Nov 2026, 22:00
บ้านหินดาดThong Pha Phum District, Kanchanaburi68.3560%Normal15 Nov 2026, 04:00
บ้านหนองกระท้าวNakhon Thai District, Phitsanulok195.4155%Normal15 Nov 2026, 03:00
บ้านลุ่มสุ่มSai Yok District, Kanchanaburi34.0749%Normal14 Nov 2026, 22:00
บ้านวังเย็นDan Makham Tia District, Kanchanaburi24.1244%Normal14 Nov 2026, 22:00
Nakhon ThaiNakhon Thai District, Phitsanulok199.1744%Normal15 Nov 2026, 04:30
บ้านวังเย็น (K.37)Dan Makham Tia District, Kanchanaburi24.1743%Normal15 Nov 2026, 04:00
บ้านลิ่นถิ่น (K.54)Thong Pha Phum District, Kanchanaburi64.0139%Normal15 Nov 2026, 04:00
อ.วัดโบสถ์ (N.22A)Wat Bot District, Phitsanulok42.5732%Normal15 Nov 2026, 04:00
บ้านท่างามWat Bot District, Phitsanulok42.5230%Low15 Nov 2026, 03:00
บ้านแก่งบัวคำChat Trakan District, Phitsanulok162.0829%Low15 Nov 2026, 03:00
Sai YokSai Yok District, Kanchanaburi34.7629%Low15 Nov 2026, 04:30
บ้านปากแซง (K.58)Sai Yok District, Kanchanaburi42.1125%Low15 Nov 2026, 04:00
บ้านลุ่มสุ่ม (K.10)Sai Yok District, Kanchanaburi34.1125%Low15 Nov 2026, 04:00
อ.ทองผาภูมิThong Pha Phum District, Kanchanaburi77.9420%Low15 Nov 2026, 04:00
Lin ThinSai Yok District, Kanchanaburi61.9019%Low15 Nov 2026, 04:30

Data from the National Hydroinformatics Data Center (ThaiWater), HII, refreshed every 10 minutes

Frequently asked questions

Which provinces does the Khwae Noi River flow through?
The Khwae Noi River flows through 1 provinces: Kanchanaburi.
How long is the Khwae Noi River?
The Khwae Noi River is about 250 km long, measured along the river on this map. Official figures can differ slightly with the method used.
Where does the Khwae Noi River come from?
The Khwae Noi River rises in Kanchanaburi province.
Which river does the Khwae Noi River flow into?
The Khwae Noi River flows into the Mae Klong River in Kanchanaburi province.
Which dams are on the Khwae Noi River?
Dams on the Khwae Noi River on this map: Vajiralongkorn Dam.
What is the Khwae Noi River water level today?
Of 17 gauging stations, 0 are over the bank and 1 have high water. Data as of 15 Nov 2026, 04:30.
What is the Khwae Noi River called in Thai?
In Thai the Khwae Noi River is แม่น้ำแควน้อย.

Other rivers in the Mae Klong basin

Mae Klong RiverKhwae Yai River