Boreal or boreale may refer to:

• Boreal (age), the first climatic phase of the Blytt-Sernander sequence of northern Europe, during the Holocene epoch
• Boreal climate, a climate characterized by long winters and short, cool to mild summers
• Boreal ecosystem, an ecosystem with a subarctic climate in the Northern Hemisphere
• Boreal forest, a biome characterized by coniferous forests
• Boreal Sea, a Mesozoic-era seaway

Boréal is an annual French-language science fiction and fantasy convention in Canada, held in a number of different cities since its founding in 1979, though all of them, save Ottawa in 1989, were located in the province of Quebec. Major events of the convention include the panel discussions, the Guest of Honour presentations, the dealer's room, and the awards ceremony. Other events on the convention program typically include a writing contest, readings and videos, as well as book, magazine, and fanzine launches.