Gaps (or leads) between sea ice cover create unique systems where air-sea interaction and associated mixing occurs within a sub-region of open ocean, surrounded by more quiescent ice-bound ocean. We use numerical simulations to explore how the propagation of surface waves along leads can change ocean dynamics within and around summertime leads, where the surrounding sea ice is melting. Waves significantly alter the upper-ocean turbulence regime through the development of Langmuir turbulence, and they modify the intensity and symmetry of the cross-lead circulation, with implications for ice-evolution near the lead edge. We will discuss the effects of changing system parameters and propose scalings for the wave-affected turbulence and circulation.