Oberaarsee

General data
- Water type: Artificial lake
- Progression: Lake Grimsel -> Aare -> Rhine -> Waal -> Upper Merwede (Boven Merwede) -> Lower Merwede (Beneden Merwede) -> Old Meuse (Oude Maas) -> Het Scheur -> Nieuwe Waterweg (New Waterway) -> North Sea -> Atlantic Ocean -> Planet Earth
- Climates: Continental
- Continents: Europe
- Countries: Switzerland
Description
Oberaarsee is a hydroelectric reservoir in the Grimsel area, part of the municipality of Guttannen, Switzerland. Its surface area is 1.47 km2. The Oberaar dam was completed in 1953, and is operated by Kraftwerke Oberhasli. It is drained by the Oberaarbach, which flows into the Grimselsee. The Oberaar glacier is located west of the lake.