| Wellsee | |
| Location: | Schleswig-Holstein |
| Pushpin Map: | Schleswig-Holstein |
| Coords: | 54.2806°N 10.1839°W |
| Inflow: | Schlüsbek |
| Outflow: | Wellsau |
| Basin Countries: | Germany |
| Length: | 0.8km (00.5miles) |
| Width: | 0.8km (00.5miles) |
| Area: | 0.25km2 |
| Shore: | 3.3km (02.1miles) |
| Elevation: | 29m (95feet) |
Wellsee is a lake in Schleswig-Holstein, Germany. At an elevation of 29 m, its surface area is 0.25 km².