Field data collected in Paulina Saltmarsh on the mudflat, in the marsh creek, and at the marsh edge between 26 January and 29 March 2023 are deposited here. The data includes velocities, pressure, bed level change at measuring points, suspended sediment concentration data sets. This datasets were used to unravel when and how sediment is transported into or out of the salt marsh system. Date sets were used for the manuscript entitled "Conditional effects of tides and waves on sediment supply to salt marshes".