Lake Fljótavatn is in North-Ísafjarðarsýsla (county), more specifically in Fljótavík at Hornströndum. It is 3.9 km², rather shallow and 1 m above sea level. The rivers Bæjará, Svíná, Hvanná, Reyðá and a number of streams fall into it, but the outlet is through an estuary that is attributed to Atlastaðir. In Fljótavík there is a lot of char fishing, both in the estuary, the lake and the rivers that fall into it. In lake Fljótavatn both sea running char and lake char are caught, and is the sea char redder in the flesh and tastier. Brown trout are also caught in the lake and some sea trout, but they are usually rather small. The fishing is best in the lake in June and until July, but in August river Reiðá is often full of char.
There is no road connection and transport is by sea. However, is is possible to land small air planes on the sand down by the sea.