The Brahan HF Radar Demonstration Project (http://www.thebrahanproject.com/) is a collaboration between Marine Scotland Science, Qualitas Remos, and others, to show the application of High Frequency (HF) Radar in Scottish waters. This data collection comprises all in situ observations collected by Marine Scotland Science during the project period. The data collection includes moored profiling current meters, moored waves measurements and a number of drifter releases. The data collected during the Brahan project is vast and a number of projects are ongoing to further explore features identified in this initial data exploration.