The SEDMEX campaign aims to gain new insights into the driving processes behind sheltered-beach morphodynamics. Field measurements from were conducted September - October 2021 at the Prins Hendrik Zanddijk: a man-made beach on the leeside of the barrier island Texel, bordering the Marsdiep basin that is part of the Dutch Wadden Sea. This data set presents beach profile measurements collected with RTK-GNSS on 7 transects along the Prins Hendrikzanddijk. All surveys are projected onto a 0.25 discretization of the target transects.