The measurements were made on the outer surf zone. The mean longshore current bottom boundary layer is well described by a logarithmic profile. The onshore mass transport velocity is calculated taking the instruments coming in and out of the water into account. The bubbles in the water column measured as a void fraction are well described as an exponential decay relative the instantaneous water surface. The turbulent kinetic energy scales with distance from the bottom.
Dissipation is maximum near the bed as is sediment concentration.
Contributions from the alongshore wind stress are mostly evident offshore and over the inner trough of the sand bar due to the relative increase in the wind force to wave force ratio as wave forcing decreases over these regions. The vertical profiles of undertow measured beneath the wave troughs were near uniform in the regions offshore of the primary breakers and in the inner trough. Strong shear in the vertical profiles of the undertow was found over the bar and on the foreshore. A jet was found over the bar and just inside the bar as a result of strong wave breaking compressing the vertical region of the undertow. The pressure gradient results in the longshore current maximum being over the trough.