The title compound, [Cu(C(13)H(11)N(2)O)(C(2)N(3))]·H(2)O, is a mononuclear copper(II) complex in which the Cu(II) ion has a slightly distorted square-planar geometry and is coordinated by two N atoms and one O atom from the Schiff base ligand and by an N atom from dicyanamide. The O atoms of water mol-ecules contribute to O-H⋯N, O-H⋯O hydrogen bonds, leading to the formation of sheets parallel to the ac plane. There are also weak inter-actions between inversion-related mol-ecules.