Mary's Harbour is a town in the Canadian province of Newfoundland and Labrador.

The Labrador Fishermen's Union Shrimp Company employs over 120 people at the local crab processing facility.

Being located on the same latitude around 3,500 km (2,200 mi) from almost frost-free areas of Ireland, the difference between the two Atlantic coastlines is rather extreme.

As typical of eastern Canada, Mary's Harbour receives heavy snowfall each winter.

A more typical subarctic climate, like Oymyakon, Russia has a temperature lag of only about 15 days.