Havdalsvatnet

or is a lake in the municipality of Lierne in Trøndelag county, Norway. The 8.12 km2 lake lies in the northern part of the municipality, just south of the large lake Tunnsjøen. The village of Tunnsjø senter lies about 14 km east of the lake and the lake Skorovatn (in neighboring Namsskogan municipality) lies about 8 km to the west.