Coastal wetlands are valued for their diversity of wildlife, habitats, and functions. The Canadian Wildlife Service (CWS) conducted vegetation and elevation surveys between 2009 and 2019, and bathymetric and light attenuation surveys between 2018 and 2019 in coastal wetlands across the Canadian shore of Lake Ontario, Lake Erie, Lake Huron, Lake Superior, and the head of the St. Lawrence River. These datasets were used, in part, to predict the spatial and temporal response of coastal wetland vegetation to climate change as part of the Great Lakes Protection Initiative (GLPI). The goals of this project were to provide insight into climate change impacts by assessing the vulnerability of Great Lakes coastal wetlands, identify adaptive measures to increase the resilience of coastal wetlands, assess wetland vegetation response to physical variables (e.g., Great Lakes water levels), and inform the adaptive management of water-level regulation on Lake Ontario.