This project undertook experimental simulations of swash on truncated beaches to investigate the volume of water overtopping truncated beaches. A variety of cases were undertaken to compare the measured volume of water with volumes obtained by mathematical formulae. In all cases the measured volumes were more than an order of magnitude larger than the mathematical predictions. An attempt to account for interaction between successive swashes was made, as it could be the cause of the differences in volumes. Accounting for interaction made a slight improvement in the theoretical volumes, but not to any reasonable amounts. It was found that the velocity predicted by the formulae across the swash zone was very accurate. However, the depths were grossly underestimated right up the beach face causing an associated underestimation of overtopping volume. This project recommended that further research be conducted to determine if the depth profiles are improved during different beach conditions, and to determine why the predicted depths are so inaccurate.