Skyvatn is a lake in the northern part of the municipality of Bykle in Aust-Agder county, Norway. It is located south of the lake Holmavatnet and northwest of Hartevatnet. The village of Hovden in Bykle is located about 9 kilometres (5.6 mi) southeast of the lake.The lake has an area of 4.35 square kilometres (1.68 sq mi) and is located in the Setesdalsheiene mountains at an elevation of 1,090 metres (3,580 ft) above sea level.