EWK physics prospects for the HL-LHC

The Large Hadron Collider (LHC) has been successfully delivering proton-proton collision data at the unprecedented center of mass energy of 13 TeV. An upgrade is planned to increase the instantaneous luminosity delivered by high luminosity LHC (HL-LHC), aiming to deliver a total of about 3000/fb of data to the ATLAS detector. To cope with the expected data-taking conditions the ATLAS and CMS experiments are planning major upgrades of the detector. In this contribution we present an overview of the physics reach expected for electroweak measurements and searches at the HL-LHC for the CMS and ATLAS experiments. The prospects for high-precision measurements and study of rare processes are presented.