Lake Õisu
| Lake Õisu | |
|---|---|
 | |
| Location | Viljandi County, Estonia |
| Coordinates | 58°12.5′N 25°31′E / 58.2083°N 25.517°ECoordinates: 58°12.5′N 25°31′E / 58.2083°N 25.517°E |
| Basin countries | Estonia |
| Surface area | 193.4 ha (2,313,000 sq yd) |
| Average depth | 2.8 m (9.2 ft) |
| Max. depth | 4.3 m (14 ft) |
| Surface elevation | 45.5 m (149 ft) |
Lake Õisu is a lake of Estonia.