This presentation will discuss the observed climate-induced changes to date and those projected in 2050 and 2100 for 24 of the world's major wine producing regions. As viticulture is extremely sensitive to changes in temperature, precipitation, solar insolation, runoff, and humidity, grape growing and the overall quality of wine is thought to be seriously impacted by climate change. This presentation will review the various stages of grape phenology, the impact of climate on grape development in both the old and new world, and what changes may be expected for the wine industry over the next 50-100 years.