Modelling the interaction of water waves with varying current is an important issue, especially in nearshore and coastal areas and for a variety of engineering applications including interaction of waves with structures, coastal management, harbor maintenance exploitation of renewable energy sources and other. Also, this interaction often leads to the formation of extreme wave events with detrimental effects. Significant scientific effort was undertaken during the last fifty years to model linear, weakly or strongly nonlinear water waves with constant, or slowly varying currents. When variations are stronger, the difficulty remains important. In this session, contributions are invited relating experimental, numerical and theoretical works designed to improve the understanding of water waves and current interactions, including wave and current stability, wave dynamics, and energy propagation.