Wiesensee (German pronunciation: [ˈviːzənzeː]) is a small lake in the northwest corner of the Hochfilzen municipality[2] of Tyrol, Austria.

It lies between Pillersee and Hochfilzen in Austria, near the village of Unterwarming [de].

Wiesensee is fed from the south and drained to the north by the Katzelbach stream.

[3] It is close to the source of the Katzelbach and 1.7 kilometres (1.1 mi) from the valley watershed separating that stream from the Dunkelbach river, however both ultimately progress to the Inn river and then to the Danube.

The lake is gradually silting up and the southern end has become a reed bed.