In this study, the “MPI-ESM-LR” model output from phase 5 of the Coupled Model Intercomparison Project (CMIP5) is analyzed to assess the response of summer monsoon to climate change in Southwest Asia. Historical scenario is used for the past and RCP8.5 scenario is used as the projection for the future period. The conservation of wave activity is applied as a diagnostic tool to investigate the eddy activity dynamics. Upper-tropospheric Monsoon circulation in Southwest Asia is found to be attenuated at the end of 21st century. Also, the wave breaking and wave activity maxima over Eastern-Mediterranean, Middle-East, Caspian Sea and Aral will undergo a poleward shift. This means a decrease in wave activity and wave breaking in Iran which could result in less summer synoptic wave activity in the northern and northwestern parts of Iran in the future.