| Rwaba River | |
| Pushpin Map: | Burundi |
| Subdivision Type1: | Country |
| Subdivision Name1: | Burundi |
| Subdivision Type2: | Province |
| Subdivision Name2: | Makamba Province |
| Mouth: | Lake Tanganyika |
| Mouth Coordinates: | -4.3351°N 29.5876°W |
The Rwaba River (fr|Rivière Rwaba) is a river in Makamba Province, Burundi, that flows into Lake Tanganyika.
The Rwaba River forms in the northwest of Makamba Province to the north of Murinda and flows south, then southwest to enter Lake Tanganyika just north of Nyanza Lac.The Rwaba River drains the sedimentary plain of Nyanza-Lac, which is about wide and backed by high ground.Open forests on the steep slopes around the plain form a natural water catchment system, and prevent sedimentation of the river and damage from landslides.The river is fed by springs on the slopes or at the foot of the slopes.
The surroundings of the Rwaba River are a mosaic of agricultural land and natural vegetation. The area is quite densely populated, with 214 inhabitants per square kilometer as of 2016.Savannah climate prevails in the area.The average annual temperature in the area is .The warmest month is September, when the average temperature is, and the coldest is November, with .Average annual rainfall is .The wettest month is December, with an average of of precipitation, and the driest is July, with of precipitation.