Many coastal tourism destinations, and islands in particular, are vulnerable to climatic and environmental changes. These vulnerabilities develop and change continuously, a process that we do not understand very well. This leaves island destinations unprepared to respond to emerging issues. This thesis studies vulnerability as a dynamic phenomenon, resulting from interactions between elements in the coastal tourism system, including tourism stakeholders (hotels, dive operators, etc.) and environmental features (beach, coral reefs, etc.). It formulates a new approach to vulnerability assessments, including both a roadmap and a set of research tools. The thesis points to the great value of creating group settings (such as serious games) in which stakeholders can safely experience and experiment with changes in their coastal environment. The results indicate that while climate change is a global issue, we need to care for the local environment in order to maintain capacity to deal with external climate change threats.