The paper analyses the changes in wave conditions during wave propagation between intermediate and shallow water depths at a potential wave energy deployment location.

The Outer Hebrides of Scotland in the United Kingdom are home to the world’s largest fully consented wave power project and hence a detailed understanding of the local resource is important to the developer to inform annual yield forecasting, technology refinements, and installation and operational plans. To support wave power projects and to reduce uncertainty and risk associated with yield production and performance estimates of energy developments, a sensor network was installed in the area from 2011–2013. Consisting of three floating buoys in intermediate depth and two combined acoustic and pressure sensors in the nearshore region, the data obtained from the different sensors at different locations in close proximity to each other have given a valuable insight in the hydrodynamic wave processes in the area.

Data of the two acoustic sensors and one wave buoy are analysed in this paper for a period covering the full range of sea states to be expected throughout a calendar year. Distributions of maximum and significant wave heights, wave steepness and wave direction during a range of different meteorological conditions are examined and a comparison between the different sensor locations is included. The analysis also considers different distributions of both wave power and period observed during the measurement campaign.

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