The last few years, a proliferation of research efforts, regarding coastal adaptation to CC (Climate Change), has been noted, emphasizing that this policy field is of raising importance in the European continent. Acknowledging the above and, in parallel, a deficit in academic literature of comparison efforts at a national level to date, this paper examined and compared the NAP (National Adaptation Policy) of four MSs (Member States), located in the Mediterranean basin (namely France, Greece, Italy and Spain). The method used, was comparison analysis, which is a valuable tool for a better conceptualization and policy development. The analysis focused on two main comparison dimensions. The first one referred to the process of the creation and evolution of the NAPs, while the second one was associated with their content. The comparison highlighted the incentives and the importance of different stressors that have affected the development of the coastal adaptation policy in each country (administrative structure, role of research community and stakeholder's involvement). Simultaneously, a different perspective of each NAP was revealed, regarding the inclusion of possible coastal threats, as well as the categorization of possible adaptation measures. Finally, a database of research projects was developed, with participants from these four countries, focusing on coastal protection at national and international scale. The results showed a huge gap in results dissemination, a limited private participation and difficulties in determining the financial resources allocated to research initiatives for the protection of coastal areas, at each country.