Accelerometer scour monitors were deployed on the Sauk River, Washington during Water Year 2018 as part of a study on the timing of streambed scour in salmon-spawning habitat. This data release contains data of the three-dimensional orientation recorded at 15-minute intervals for the accelerometer monitors. Each accelerometer scour monitor was comprised of one to two individual accelerometers that were deployed in a vertical profile within the streambed. Thirty-one accelerometer scour monitors were deployed, but 7 accelerometer accelerometer scour monitors were recovered. This data release contains the geospatial information about the 31 accelerometer scour monitors that were deployed and three-dimensional orientation for the 7 accelerometer scour monitors that were recovered.