There are several wine festivals that happen throughout the year in Niagara on the Lake. There are several events hosted by individual wineries, groups of wineries, and the region as a whole.
Grape & Wine Festival – Every September http://www.niagarawinefestival.com/ @NiagaraWineFest
Icewine Festival – Every January http://www.niagarawinefestival.com/ @NiagaraWineFest
Group Festivals (groups of wineries who work together)
Sip & Sizzle / Wine & Chocolate / Taste of the Season – wineriesofniagaraonthelake.com (please note not all wineries take part in this festival)
(Check the winery for more information. Sometimes listed on Chamber of Commerce Events Page)
Official Chamber of Commerce website @Niagaraonthelaketourism