June 2026OCEANENERGYEUROPEOcean Energy The largest untapped renewable resourceGlobal Resource Assessment2This publication is the most exhaustive literature review to date, gathering relevant analyses on the ocean energy resource, country by country, based on the existing literature available at the time of publication. It considers the outcomes of independent studies across the globe, published by government agencies, international organisations, as well as academic literature. This report addresses a key knowledge gap by providing a consolidated view of the global ocean energy resource. Such mapping is essential to help governments assess the contribution ocean energy can make to their energy systems and design appropriate policy and funding frameworks. It provides substantiated evidence on market potential to inform investment decisions by both public and private actors.Text and analysis: Valentin Dupont Editors: Rémi Gruet and Yamila ConillDesign: JQ&ROS Visual Communications (jqrosvisual.eu)Cover photo: Courtesy of Proteus Marine Renewables 3Table of contents Executive Summary - Ocean can supply 13% of global electricity demand 6Country highlights 111. A massive global potential set to increase further 16Technology improvements will increase the energy extracted from existing identified resources 16Technological innovation will unlock new geographical resources 16Many countries have not assessed their ocean energy resource yet 172. Europe: Ocean energy can provide 21% of electricity demand 18United Kingdom: The ocean energy El Dorado of Europe 20France: The greatest tidal resource in the EU 21Ireland: Best wave resource in the EU, four times the electricity demand 23Portugal: Wave energy can cover over 100% of the count...
