The present work focuses on the necessity of a deep and accurate knowledge of metocean conditions for Offshore Renewable Energy devices. In-situ measurements are accurate, but often not-available (due to malfunctions) or expensive to obtain on a large time-scale, and reanalysis datasets are characterized by an intrinsic uncertainty. The possibility to exploit wave direction in bias correction methods was therefore analyzed here. Three directional strategies were tried; their results (centred on the significant wave height’s correction) were computed and compared across four locations around the Iberian peninsula (each offering different wave and wind characteristics for an optimal cross-validation) according to apposite statistical parameters.