It is very imperative to study and analyse the significance of coastal hydrodynamics, offshore and near shore wave characteristics viz., significant wave height (Hs), Peak wave period (Tp) for any planning and development of coastal infrastructure and other offshore activities. In this paper with the help of numerical modelling techniques, we developed a hydrodynamic and a wave model for Bay of Bengal and the near shore characteristics of the west coast of South Andaman. A storm surge model was also created where the cyclone lahar that hit Port Blair on 23rd November 2014 that stand as the reference for the wave model. The hydrodynamic model for the simulation of current speed, direction and surface elevation were simulated using DHI's MIKE 21 HD FM and the significant wave height peak period were simulated using DHI's MIKE 21 SW module.