|Primary outflows||Storåna river|
|Catchment area||Tovdalselva watershed|
|Max. length||3.7 kilometres (2.3 mi)|
|Max. width||1.2 kilometres (0.75 mi)|
|Surface area||2.4 km2 (0.93 sq mi)|
|Shore length1||11.89 kilometres (7.39 mi)|
|Surface elevation||606 metres (1,988 ft)|
|1 Shore length is not a well-defined measure.|
Topsæ is a lake in the municipality of Bygland in Aust-Agder county, Norway. The 2.4-square-kilometre (0.93 sq mi) lake is located 3 kilometres (1.9 mi) east of the lake Hovatn, about 10 kilometres (6.2 mi) northeast of the village of Åraksbø. The Topsæfossen waterfall is located at the north end of the lake at the primary inflow. At the southeastern corner of the lake, there is a small dam to regulate the outflow of the lake into the Tovdalselva watershed.
- "Topsæ" (in Norwegian). yr.no. Retrieved 2010-04-20.