| Oberaarsee | |
|---|---|
| Location | Guttannen, Canton of Berne |
| Lake type | reservoir |
| Catchment area | 19.4 km² |
| Basin countries | Switzerland |
| Max. length | 2.8 km |
| Surface area | 1.47 km² |
| Max. depth | 90 m |
| Surface elevation | 2,303 m |
Oberaarsee is a reservoir in the Grimsel area, part of the municipality of Guttannen, Switzerland. The Oberaar glacier is located west of the lake. Its surface area is 1.47 km². The Oberaar dam was completed in 1953.
It is drained by the Oberaarbach, which flows into the Grimselsee.
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