Roes Welcome Sound is a long channel at the northwest end of Hudson Bay in the Kivalliq Region, Nunavut, Canada between the mainland on the west and Southampton Island on the east.

Its north end joins Repulse Bay[2] which is connected east through Frozen Strait to Foxe Basin, thereby making Southampton Island an island.

It is named after Sir Thomas Roe, friend and sponsor of explorer Luke Foxe's 1631 Arctic voyage.

[5][6] Captain William Edward Parry, trying to find the Northwest Passage during his 1821 voyage, wrote:[7] On an inspection of the charts, I think it will also appear probable that a communication will one day be found to exist between this inlet (Prince Regent's) and Hudson's Bay, either through the broad and unexplored channel called Sir Thomas Roe's Welcome, or through Repulse Bay, which has not yet been satisfactorily examined.Roes Welcome Sound is a bowhead whale migratory path.

[8] Naujaat to the north has a tundra climate (Köppen ET) with short but cool summers and long, cold winters.