Estuaries and other coastal wetlands provide a wide range of ecosystem services that help sustain water quality, food resources (fisheries and aquaculture) and recreational amenity. Their ability to maintain those services under changing climate conditions is of significant concern to coastal communities. Scenario results from a spatial whole-of-system model have been used to explore impacts of changing climate on the functioning of an estuarine ecosystem and the services it provides. Results suggest that wetlands are the most critical system element required to support resilience and adaptation. System level outcomes have been compared across management strategies with increasing levels of wetland protection and rehabilitation.