In order to satisfy the need to increase renewable sources, in the future it will be necessary to focus also on the offshore ones. To date, this term refers substantially to offshore wind, in its two forms bottom-fixed and floating wind turbines, and ocean energy, which has among its resources wave energy as the most promising. Without their use it would be impossible to achieve the reliability and flexibility that renewable sources need.Given their importance, in this study a methodology has been designed to analyse data of wind and waves in the Mediterranean Sea, in order to obtain an estimate and evaluation of its potential.The study used eleven years of hourly weather data downloaded from the ERA5 site, from 2010 to 2020, while the writing is done using the MATLAB platform.The first part of the methodology uses wind (speed and direction) and wave data (period, significant height, direction) to create maps of resources power density and technology potential.These data are interpolated, using the MATLAB function interp2, to increase the accuracy of the grid ( it is possible to choose it), then the following constraints are set: bathymetry, protected areas, exclusive economic zones, distance from the coast and technological restrictions.