Sira is a river in southwestern Norway. The  long river flows begins in the Sirdalsheiane mountains near the borders of Agder and Rogaland counties. The headwaters of the river is the lake Ytre Storevatnet and it flows south through the Sirdalen valley in the municipalities of Sirdal and Flekkefjord.
Sira, a river in southwestern Norway, originates from the Sirdalsheiane mountains near the borders of Agder and Rogaland counties. It flows southward through the Sirdalen valley, passing through the municipalities of Sirdal and Flekkefjord. Its source is Lake Ytre Storevatnet.