WETTER, a lake in Sweden; about 24 miles S. E. of Lake Wener; greatest length, 80 miles; medium breadth, about 15 miles. Its height above the level of the Baltic is nearly 300 feet, but its depth is in some parts above 400 feet. The Wetter forms parts of the canal connections between the Cattegat and the Baltic. The chief town on its shores is Jönköping.