Abstract We present the photometry and spectroscopy of SN 2015an, a Type II Supernova (SN) in IC 2367. The recombination phase of the SN lasts up to ∼120 d, with a decline rate of 1.24 mag/100d, higher than the typical SNe IIP. The SN exhibits bluer colours than most SNe II, indicating higher ejecta temperatures. The absolute V-band magnitude of SN 2015an at 50 d is −16.83 ±0.04 mag, pretty typical for SNe II. However, the 56Ni mass yield, estimated from the tail V-band light curve to be 0.021±0.010 M⊙, is comparatively low. The spectral properties of SN 2015an are atypical, with low Hα expansion velocity and presence of high velocity component of Hα at early phases. Moreover, the continuum exhibits excess blue flux up to ∼50 d, which is interpreted as a progenitor metallicity effect. The high velocity feature indicates ejecta-circumstellar material interaction at early phases. The semi-analytical modelling of the bolometric light curve yields a total ejected mass of ∼12 M⊙, a pre-supernova radius of ∼388 R⊙ and explosion energy of ∼1.8 foe.