It is virtually landlocked but is joined to the Arctic Ocean to the north by Foxe Channel and Fury and Hecla Strait, and to the Atlantic Ocean on the east by Hudson Strait. Baffin Island lies athwart the entrance to the bay, and Southampton, Coats and Mansel islands are lodged across the northern gap.
Ungava Bay, is a large, funnel-shaped bay that deeply indents the northern coast of Québec adjacent to Labrador. At its mouth, about 265 km wide, it opens into Hudson Strait. Leaf Basin at its southwestern extremity is noted for its high tidal range and its swift and dangerous tidal currents.