| Fyresvatn | |
|---|---|
) | |
)  Fyresvatn | |
| Location | Fyresdal, Vestfold og Telemark |
| Coordinates | 59°06′N 8°12′E / 59.100°N 8.200°E |
| Primary outflows | Fyreselv |
| Basin countries | Norway |
| Surface area | 49.63 km2 (19.16 sq mi) |
| Max. depth | 377 m (1,237 ft) |
| Shore length1 | 63.41 km (39.40 mi) |
| Surface elevation | 279 m (915 ft) |
| 1 Shore length is not a well-defined measure. | |
Fyresvatn, or Fyresvatnet, is the fifth-deepest lake in Norway with a depth of 377 metres (1,237 ft).
It is located in Fyresdal municipality, part of Vestfold og Telemark county.
Fyresvatn belongs to the Arendal watershed, and discharges via the Fyreselv river into the Nidelva river, which flows into the Skagerrak at Arendal in the county of Aust-Agder.