| Siguvyaye River | |
| Pushpin Map: | Burundi |
| Subdivision Type1: | Country |
| Subdivision Name1: | Burundi |
| Subdivision Type2: | Province |
| Subdivision Name2: | Bururi Province |
| Mouth: | Murembwe River |
The Siguvyaye River (fr|Rivière Siguvyaye) is a river in Burundi.
The Siguvyaye River rises near Nyagatovu in southern Bururi Province, and flows east–west through that province for its entire length.After passing south of the city of Bururi it flows through the southern end of the Bururi Forest Nature Reserve.
The Bururi forest is very humid, with plentiful Newtonia buchananii and Carapa grandiflora in the lower parts of the Siguvyaye River valley below .The waterfalls of the river and the beautiful surrounding landscapes are potential tourist attractions.However, tourists do not know about the waterfalls in part because of their inaccessibility, and in part because of lack of publicity.
Further down, the Siguvyaye River powers the Nyemanga Hydroelectric Power Station. The dam is maintained by water from the Bururi forest.The lowest section of the river forms the boundary between Bururi Province to the north and Rumonge Province to the south.At its mouth, the Siguvyaye River is a tributary of the Murembwe River.
The surroundings of the Siguvyaye River are a mosaic of agricultural land and natural vegetation. The area is quite densely populated, with 166 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 December, with .Average annual rainfall is .The wettest month is December, with an average of of precipitation, and the driest is July, with of precipitation.
In March 2022 it was reported that Tembo Power (Mauritius), an independent power producer, was looking for investors in two run-of-river hydroelectric power plants.The larger of the two would be in Sigu village and would harness the Siguvyaye River, generating 12.4 MW.The smaller would be on the Dama River in Rumonge Province and would generate 9.6 MW.