The global energy transition, indispensable to gradually reduce the carbon intensity of many energy sources, is determining a significant development in offshore renewable technologies. However, when considering their entire life cycle, it is not completely environmentally friendly, and, as for the fossil fuels, some are more impactful than others. The evaluation of these impacts is, therefore, fundamental and can be used to optimize manufacturing processes to reduce the quantity of carbon dioxide emitted into the atmosphere and related energy consumption. The dissertation focuses on the complete life cycle assessment analysis of a wave energy converter, specifically a point absorber, starting from the goal and scope definition and following with the life cycle inventory of all the materials and processes used to build, install and decommission the device.