We will discuss several results regarding a wind energy resource assessment based on data from the climate UPSCALE model and using the offshore waters of Mexico as a case study. The UPSCALE dataset used is based on the HadGEM3-GA3.0 configuration of the Met Office Unified Model (MetUM) version 8.0, combined with the GL3.0 congufiration of the JULES community land surface model. First, a resource characterization at a national scale is presented, where we stress the importance of the extrapolation techniques and of air density changes in the estimation of the wind power density. Then, we present an analysis of climate change effects on offshore wind energy resources under the RCP8.5 climate change scenario, showing that such effects are strongly site specific. We close with a techno-socio-ecological study for a smaller, test region, corresponding to the Central and Upper Gulf of California, and show that even under the most restrictive scenario, more than 68% of Mexico’s 2017 energy production could still come from offshore wind energy farm developments in this region alone.