The Geological Survey of Ireland, in collaboration with the CHERISH project, is actively surveying the dynamic Irish coastline to monitor erosion and sedimentation patterns influenced by climate change. Using fixed-wing UAVs, such as the Trimble UX5 equipped with optical cameras, sections of the coastline were surveyed in 2017 and again in 2018, creating 3D point clouds that allow precise comparison of topographic changes over time. For example, Rosslare’s dunes revealed a significant erosion of up to 4 meters in elevation and the movement of approximately 5,800 cubic meters of sediment. Despite erosion, much of the sediment is retained nearby, with minimal amounts drifting out to sea. This critical information is invaluable for current infrastructure planning, climate-change adaptation, and mitigation strategies, allowing data-driven decisions in coastal management.