## 1 Introduction  
The development of marine energies has become essential for the green energy sector, in order to mitigate the human influence on climate change, and move towards 100% clean energy, as stated in the 2030 Agenda for Sustainable Development released by the UN in 2015 [1]. Pursuing this goal, both the European Parliament and the European Council have endorsed 60% emission reductions by 2030 [2], and long-term climate neutrality for the EU by 2050. Europe's decarbonization plan to achieve the net-zero greenhouse gas emission target relies heavily on an offshore renewable energy strategy [3]. The strategic roadmap is to deliver up to 100 GW of capacity by 2050, which represents approximately 10% of Europe's electricity consumption [3, 4]. The European Commission, through its member states, has made great efforts to achieve this goal by promoting projects that address ocean energy efficiency [3, 4, 5, 6, 7], and the competitiveness of offshore wind [8, 9, 10] and ocean energies [11, 12]. In fact, the European Union is currently the world leader in offshore wind [13] and intends to advance in the implementation of the actions of its Strategic Energy Technology (SET) plan [14]. The current development of wind technologies has reduced the cost, maintenance, and equipment of wind turbines, and, at the same time, has increased wind turbine efficiency and availability [8; 10; 15]. This makes wind power cheaper than photovoltaic power, while costing about half of atomic power [16]. Therefore, an explosion in the offshore wind industry is expected, which may positively influence the development of other technologies with high synergy [15; 17], such as wave energy conversion. In fact, one of the strategies of the EU SET plan is to increase competitiveness by exploiting wave energy at the same time as wind power. Hybrid wind-wave farms can reduce installation and maintenance costs [17; 18] and increase the availability of a location by compensating for the winds intermittent nature with good wave conditions. Furthermore, the wave farm can provide protection to the wind farm, and the combined wind-wave farm can provide coastal protection [19; 20; 21]. Several authors have assessed the combined exploitation of wind and wave resources [22] in Europe [17; 23; 24; 25], and worldwide [26; 27]. These studies determined the most suitable locations for wind exploitation, and the specific wave energy conversion (WEC) devices for those locations. Current wind and wave energy technology is intended to have a useful life of at least 20 years [28; 29], therefore, when using this combined energy resource, it is important to take into account not only current climatic conditions but also the effect of climate change on wind and wave energy resources in the near future [30]. Climate change is expected to affect future wind and wave yields [31; 32; 33]. The global climate models (GCMs) from Phase 5 of the Coupled Model Intercomparison Project (CMIP5) have been tested and verified as reliable sources for future wind and wave variables [34; 35]. The EURO-CORDEX initiative, the European branch of the Coordinated Regional Climate Downscaling Experiment (CORDEX) project [36], used a wide range of regional climate models (RCMs) driven by several CMIP5 GCMs, under different greenhouse gas emission scenarios, to project wind and the significant height and period of waves, with a high spatial and temporal resolution. However, to assess the feasibility of operating a hybrid wind-wave farm in a specific location, it is necessary to take into account not only wave and wind resources for the near future but also environmental conditions and cost factors [37; 38]. The NW Atlantic coast of the Iberian Peninsula, from 36.5\({}^{\circ}\) to 45.5\({}^{\circ}\) N and from 6\({}^{\circ}\) to 11\({}^{\circ}\) W (Figure 1), covers the coast of Portugal and Galicia (Spain).