Basin Chao Phraya
Noi River
แม่น้ำน้อย
A branch that splits off from the Chao Phraya River in Chai Nat province. It runs parallel to the west through Sing Buri and Ang Thong, then rejoins the Chao Phraya River in Phra Nakhon Si Ayutthaya province.
Key facts
- Length
- about 170 kmMeasured along the river on this map; official figures can differ with the method used
- Source
- Chai Nat province
- Flows into
- Chao Phraya River, Phra Nakhon Si Ayutthaya province
- Basin
- Chao Phraya
- Provinces (4)
- Chai Nat, Sing Buri, Ang Thong, Phra Nakhon Si Ayutthaya
Noi River water level today
6 automatic gauging stations on this river, highest water relative to the bank first. As of 29 Sep 2026, 21:50
| Station | Location | Level (m MSL) | Of bank-full | Status | Measured |
|---|---|---|---|---|---|
| Chao Phraya 9 | Bang Ban District, Phra Nakhon Si Ayutthaya | 6.02 | 120% | Over the bank | 29 Sep 2026, 21:50 |
| บ้านบางหลวงโดด | Bang Ban District, Phra Nakhon Si Ayutthaya | 6.06 | 117% | Over the bank | 29 Sep 2026, 21:00 |
| Sena | Sena District, Phra Nakhon Si Ayutthaya | 2.69 | 83% | High | 29 Sep 2026, 21:50 |
| Ku Ti | Phak Hai District, Phra Nakhon Si Ayutthaya | 5.73 | 80% | High | 29 Sep 2026, 21:50 |
| BangKaeo | Phak Hai District, Phra Nakhon Si Ayutthaya | 3.40 | 68% | Normal | 29 Sep 2026, 21:50 |
| Sena | Sena District, Phra Nakhon Si Ayutthaya | 1.89 | 63% | Normal | 29 Sep 2026, 21:50 |
Data from the National Hydroinformatics Data Center (ThaiWater), HII, refreshed every 10 minutes
Frequently asked questions
- Which provinces does the Noi River flow through?
- The Noi River flows through 4 provinces: Chai Nat, Sing Buri, Ang Thong and Phra Nakhon Si Ayutthaya.
- How long is the Noi River?
- The Noi River is about 170 km long, measured along the river on this map. Official figures can differ slightly with the method used.
- Where does the Noi River come from?
- The Noi River rises in Chai Nat province.
- Which river does the Noi River flow into?
- The Noi River flows into the Chao Phraya River in Phra Nakhon Si Ayutthaya province.
- What is the Noi River water level today?
- Of 6 gauging stations, 2 are over the bank and 2 have high water. Data as of 29 Sep 2026, 21:50.
- What is the Noi River called in Thai?
- In Thai the Noi River is แม่น้ำน้อย.