The CuII ion, located on a twofold rotation axis, is penta-coordinated via two nitro­gen atoms of NA and two oxygen atoms of SB anions and one oxygen atom of the water mol­ecule. The two carboxyl­ate O atoms [O2 and O2i; symmetry code: (i) 1 − x, y, − z] of two symmetry-related monodentate SB anions and the two pyridine N atoms (N1 and N1i) of two symmetry-related monodentate NA ligands are at distances of 1.978 (2) and 2.025 (3) Å, respectively, from the Cu1 atom and form a slightly distorted square-planar arrangement. The sum of the bond angles N1—Cu1—O2i [87.79 (10)°], N1i—Cu1—O2i [92.08 (10)°], O2—Cu1—N1 [92.08 (10)°] and O2—Cu1—N1i [87.79 (10)°] in the basal plane around CuII ion is 359.74°. This confirms the presence of CuII ion with very slight deviation from the basal plane. The slightly distorted square-pyramidal coordination environment is completed by the water O atom (O6) at a distance of 2.147 (4) Å in the axial position.