The asymmetric unit of the title compound, C(16)H(15)N(3)O·H(2)O, contains an N'-(2-methyl-3-phenyl-allyl-idene)nicotino-hydra-zide mol-ecule and a water solvent mol-ecule. The dihedral angle between the pyridine ring and the phenyl ring is 47.26 (5)°. Inter-molecular O-H⋯N, O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds are found in the crystal structure. Furthermore, C-H⋯π inter-actions involving the pyridine and phenyl rings are also found.