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In this paper the effects of grains on near shore hydrodynamic processes are studied by applying physical models. The experiments were conducted in a wave basin with fixed bed. Both regular and irregular waves were used in the tests. Wave induced currents were measured using bi-directional electromagnetic current meters and waves heights were measured using capacitance wave height meters. Twelve tests were conducted on straight beach with no grains and a single grain. The wave height and current patterns are discussed. The significance of wave-current interaction in the near shore region was shown in the results of
the experiments, especially in the presence of grains. The data provided by
this series of tests could be applied to the calibration and verification of two and three dimensional numerical models.