Baffin Bay July, the average temperature is . The annual precipitation is on the Greenland side and about twice as much near Baffin Island. The water temperature at the surface is below in winter. In summer, it varies from in the south-east to and below at north-west. The salinity exceeds 34‰ (parts per thousand) in winter. In summer, it is 32‰ on the east and 30–31‰ on the west. Deep waters are formed as a result of mixing of Arctic and Atlantic waters; their temperature is about and salinity is 34.5 ‰. In winter, 80% of the bay is covered with continuous
Hudson Complex to the east. The Fury and Hecla Strait, between Baffin Island and the Melville Peninsula, is the transition to the Lancaster Sound marine ecoregion to the northwest. Hudson Complex The Hudson Complex is a marine ecoregion in Canada, part of the Arctic marine realm. The Hudson Complex includes Hudson Bay and smaller James Bay to the south, as well as the Foxe Basin, Hudson Strait and Ungava Bay. The Canadian mainland surrounds the Hudson Complex on the west and south, and Baffin Island on the north. Straits connect the Hudson Complex to other marine ecoregions to the northwest and east.