In the title compound, [Cu(NCS)(2)(C(6)H(6)N(2)O)(2)(H(2)O)], the Cu atom adopts a square-based pyramidal CuN(4)O coordination, with the water O atom in the apical position. The pairs of N-bonded nicotinamide ligands and thio-cyanate anions in the basal plane are in a trans configuration. In the crystal structure, the mol-ecules are connected into sheets by N-H⋯O and O-H⋯O hydrogen bonds.