A review of trends in physical properties of Baffin Bay and Davis Strait based on published literature, analyses of archived long time series data and interpretation of recent data are presented. General physical characteristics of Baffin Bay and Davis Strait are also described, including the general circulation and a summary of freshwater sources. The time series presented and analyzed are typically characterized by high inter-annual variability but there is evidence of freshening on the Baffin Island Shelf since 1980, and warming of Baffin Bay intermediate waters over the last 50 years. Input into Baffin Bay through Barrow Strait/Lancaster Sound has become warmer and more saline over the last decade, and there is also the suggestion of a downward trend (p= 0.13) in the volume and freshwater input here of 4% per year over this same period, but the 12 year data set is too short to confidently establish that these trends in Barrow Strait are anything more than natural variability There are insufficient published data to assess trends in other Baffin Bay/Davis Strait ocean inputs, except for evidence of increasing meteoric water input from the Greenland ice sheet. Accelerating mass loss will likely make it a significant freshwater contributor by 2050 that will decrease salinity of the Baffin Island Current and therefore the Labrador Current further downstream. Finally, there has been strong atmospheric warming on the western side of Baffin Bay (2 to 3 C/decade) since the late 1990’s and coincident rapid decline of sea ice cover in all seasons (Peterson and Pettipas, 2013).