Advances in Renewable Energies Offshore is a collection of the papers presented at the 3rd International Conference on Renewable Energies Offshore (RENEW 2018) held in Lisbon, Portugal, on 8-10 October 2018. The 104 contributions were written by a diverse international group of authors and have been reviewed by an International Scientific Committee. The book is organized in the following main subject areas:

- Modelling tidal currents

- Modelling waves

- Tidal energy devices (design, applications and experiments)

- Tidal energy arrays

- Wave energy devices (point absorber, multibody, applications, control, experiments, CFD, coastal OWC, OWC and turbines)

- Wave energy arrays

- Wind energy devices

- Wind energy arrays

- Maintenance and reliability

- Combined platforms

- Moorings, and

- Flexible materials

Advances in Renewable Energies Offshore collects recent developments in these fields, and will be of interest to academics and professionals involved in the above mentioned areas.