| Bahau River | |
| Name Other: | Sungai Bahau |
| Pushpin Map: | Indonesia Kalimantan#Indonesia |
| Pushpin Map Size: | 285 |
| Pushpin Map Caption: | Location of river mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | Indonesia |
| Subdivision Type2: | Province |
The Bahau River is a river in North Kalimantan, Indonesia, about 1400 km northeast of the capital Jakarta.[1] [2]
The river is deemed a tributary of the Kayan River.
The river flows in the northeast area of Kalimantan with a predominantly tropical rainforest climate (designated as Af in the Köppen-Geiger climate classification).[3] The annual average temperature in the area is 20 °C. The warmest month is October when the average temperature is around 22 °C, and the coldest is July, at 19 °C.[4] The average annual rainfall is 3957 mm. The wettest month is September, with an average of 446 mm rainfall, and the driest is April, with 269 mm rainfall.[5]