In the present work, measurements for three single swash events are selected from those available for an accretive tide that occurred at Le Truc Vert beach (France) during a field campaign at that location. These data are compared to results obtained from a 'state-of-the art' numerical fully-coupled 1D morphodynamical shallow water solver, driven by measurements made of those events in the lower swash / inner surf zone.It is found that the hydrodynamics is reasonably well represented, although the computed results exhibit reduced maximum inundations in comparison with the observed ones. The model reproduces the correct order of magnitude of the morphodynamic change after each event, and sometimes the pattern of erosion and deposition, but this change is generally underestimated.Sensitivity analyses are conducted with respect to more uncertain physical parameters and assumed initial conditions. They suggest that initial spatial distributions for velocity and pre-suspended sediment concentration play a key role in the quantitative and qualitative prediction of the bed change.