Sâi
| Sâi Șiu | |
|---|---|
| Location | |
| Country | Romania | 
| Counties | Olt, Teleorman | 
| Physical characteristics | |
| Mouth | Danube | 
|  • coordinates | 43°42′54″N 24°51′01″E / 43.7149°N 24.8503°E | 
| Length | 85 km (53 mi) | 
| Basin size | 314 km2 (121 sq mi) | 
| Basin features | |
| Progression | Danube→ Black Sea | 
The Sâi (also: Șiu) is a left tributary of the river Danube in Romania. It discharges into the Danube near Turnu Măgurele. It flows parallel to the lower course of the river Olt, about 5 km east of the Olt, through the villages Dăneasa, Sprâncenata, Beciu, Plopii-Slăvitești, Slobozia Mândra, Uda-Clocociov, Saelele, Lunca, Segarcea-Vale and Lița. Its length is 85 km (53 mi) and its basin size is 314 km2 (121 sq mi).