Skyvatn is a lake in the northern part of the municipality of Bykle in Agder county, Norway. The lake is located south of the lake Holmavatnet and northwest of the lake Hartevatnet. The village of Hovden in Bykle is the nearest village, 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. The mountains of Storhellernuten, Skyvassnuten, and Sveigen are all located to the northwest, west, and southwest, respectively.

• List of lakes in Aust-Agder
• List of lakes in Norway