| Arnensee | |||||
| Other Name: | Lac d'Arnon | ||||
| Image Bathymetry: | Karte Arnensee.png | ||||
| Caption Bathymetry: | map | ||||
| Location: | Gsteig, Canton of Bern | ||||
| Coords: | 46.3882°N 7.2168°W | ||||
| Type: | reservoir | ||||
| Inflow: | Tschärzisbach | ||||
| Outflow: | Tschärzisbach | ||||
| Catchment: | 7.1km2 | ||||
| Basin Countries: | Switzerland | ||||
| Length: | 1.5km (00.9miles) | ||||
| Area: | 0.456km2 | ||||
| Max-Depth: | 50m (160feet) | ||||
| Volume: | 10.5e6m3 | ||||
| Elevation: | 1542m (5,059feet) | ||||
| Pushpin Map: | Canton of Bern#Switzerland#Alps | ||||
| Pushpin Label Position: | bottom | ||||
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Arnensee (French: Lac d'Arnon) is a lake in canton of Bern, Switzerland. The lake in the municipality of Gsteig is used as a reservoir by Romande Energie. The dam was built in 1942. Its volume is 10.5 mio m³ and surface area 0.456 km2.