Nanocrystalline CdSe films were grown onto glass substrates by the chemical bath method. Different constant deposition temperatures (T d ) were employed in the range 4-65 ºC. Average grain size (GS) increased monotonically with T d , reaching saturation at~65 ºC. The GS values were in the interval 5-16 nm. At low T d values (4-15 ºC), the structural phase was hexagonal wurtzite (W), for intermediate values, a wurtzite and zincblende (ZB) mixture of phases was found, and at high T d (65 ºC) only cubic ZB phase was present in the layers. The variation of the bandgap as a result of the structural phase change and quantum confinement is studied.