This dataset consists of processed Acoustic Doppler Velocimetry (ADV) and Terrestrial Laser Scan (TLS) data of a sandy flume bed. The experiments were undertaken in the HR Wallingford laboratory in February and March 2023. Experiments were designed to investigate the generation of sandy bedforms in the wakes of offshore wind turbines, and the variation of bed shear stress due to both the bedforms and the monopiles. Two monopile sizes were used (0.25 m and 0.65 m) with a 1:20 scaling to field scale. Cleaned quarry sand was used to make the sand bed (0.2 m deep), of median diameter 0.245 mm, and 90th percentile 0.290 mm. Rock armour was created and placed around the monopiles to create realistic designs, this consisted of 10 mm grains of high-density rock (3000 kg/m3). Rock armour geometry can be found in the TLS scans. Data were collected by Bangor University, HR Wallingford and the National Oceanography Centre under the ECOWind ACCELERATE project funded by the Natural Environment Research Council (NERC) under reference NE/X008886/1.