A Princeton Ocean Model (POM) of the Mediterranean Sea has been developed in University of Athens. In this paper the results of the climatological run at a horizontal resolution of 0.25 x 0.25 deg. are presented. Sea Surface Temperature (SST) and Sea Surface Salinity (SSS) were restored to monthly climatology with a restoring coefficient of 1 m/day. The seasonal variability of the general circulation was found to be in a good agreement with the observed patterns and some known features have been observed for the first time. The implied surface fluxes (heat loss and salt gain) were too weak and resulted in absence of deep water formation.