Contribution of Southern Indian Ocean swells on the wave heights in the Northern Indian Ocean-A modeling study

► A study on swell propagation from Southern Indian Ocean. ► And to account for its contribution to the local wave climate in Northern Indian Ocean using wave model. ► These swells play an important role in Northern Indian Ocean wave climate. ► Under southwest monsoon, the swell dominance on local wave climate drops in Bay of Bengal but not as much as in Arabian Sea. ► Rest of the year, the swell is a dominant factor in determining the wave climate of the Northern Indian Ocean.