| Seybouse | |
|---|---|
 The Seybouse in Guelma Province, Algeria | |
 The Seybouse catchment area | |
| Native name | وادي سيبوس (Arabic) |
| Location | |
| Country | Algeria |
| Physical characteristics | |
| Source | |
| • location | Medjez Amar, Tell Atlas Algeria |
| Mouth | |
• location | Mediterranean Sea, near Annaba, Algeria |
• coordinates | 36°52′05″N 7°46′27″E / 36.8681°N 7.7741°E |
• elevation | 0 m (0 ft) |
| Length | 225 km (140 mi) |
| Basin size | 6,471 km2 (2,498 sq mi) |
| Discharge | |
| • average | 11.5 m3/s (410 cu ft/s) at Guelma and Annaba |
Seybouse (in Algerian Arabic: وادي سيبوس, romanized: Oued Seybouse) is a river in northeastern Algeria, near the border with Tunisia. In Roman times, it was called the Ubus.