Sövdesjön has an area of 2.72 km2. The lake is part of a larger system with several lakes. The catchment area consists mainly of equal parts forest and fields. The only outflow is the Klingavälsån river, which flows north.
The lake has three islands, one in Kyrkviken and two in the southern part of the lake. Sövdesjön also has several shoals. The shores are shallow and drop off after about 10 - 100 m. The surroundings around the lake are very flat and the lake is heavily exposed to wind. In the northern part there are large reed belts. The deepest part of the lake is about 8 m.
To improve the water quality, reduction fishing has been carried out. The goal of reduction fishing is to achieve clearer water, fewer algae blooms, increased biodiversity and to benefit predatory fish, which in turn is expected to have a positive effect on downstream areas and outdoor recreation. In Lake Sövdesjön, 21 different species of fish are found.
