The contribution of renewable energy offshore to the total energy production is increasing, as is the interest in this topic. Innovations in Renewable Energies Offshore includes the papers presented at the 6th International Conference on Renewable Energies Offshore (RENEW 2024, 19-21 November, 2024, Lisbon, Portugal), and aims to contribute to the knowledge about the developments and experience obtained in concept development, design and operation of such devices. The contributions cover a wide range of topics, including: Resource assessment Wind Energy Wave Energy Tidal Energy Photovoltaic Energy Hydrogen Offshore Multiuse Platforms PTO design Economic assessment Materials and structural design Maintenance Vessels Innovations in Renewable Energies Offshore will be of interest to academics and professionals involved or interested in applications of renewable energy resources offshore.