Unterwarnow
| Unterwarnow | |
|---|---|
| View to the City of Rostock | |
| Location | Baltic Sea | 
| Coordinates | 54°06′14.7″N 12°06′14.9″E / 54.104083°N 12.104139°E | 
| River sources | Warnow | 
| Ocean/sea sources | Atlantic Ocean | 
| Basin countries | Germany | 
| Max. depth | 13 m (43 ft) | 
| Salinity | ~10‰ | 
| Settlements | Rostock | 
Unterwarnow is the estuary of the Warnow River in Mecklenburg-Vorpommern, northern Germany. It connects with the Baltic Sea in Warnemünde. The city of Rostock is located on its banks.