Southampton Island

Southampton Island sits at the entrance to Hudson Bay, where it meets Foxe Basin, and is part of Nunavut’s Kivalliq Region. It ranks as the 32nd largest island globally and the seventh largest in Canada. While Statistics Canada once measured its area at 41,214 km², the United States Geological Survey, Esri, and the United Nations Environment Programme – World Conservation Monitoring Centre now put it at 43,069.35 km². The island’s sole community is Coral Harbour—known as Salliq in Inuktitut—which had a population of 1,035 in the 2021 Canadian census. Notably, Southampton Island is the only part of Nunavut that does not observe daylight saving time.

Historically, the island is known for its former inhabitants, the Sadlermiut (called Sallirmiut in modern Inuktitut, meaning “people of Salliq”). This pre-Inuit Tuniit culture vanished in 1902–03 when infectious disease wiped out the entire Sallirmiut population within weeks. The first European to record a visit was Welsh explorer Thomas Button in 1613. Early in the 20th century, the island was resettled by Aivilingmiut from Naujaat and Chesterfield Inlet, encouraged by whaler Captain George Comer and others. About 25 years later, Baffin Islanders also arrived. Among the most famous of these new settlers was John Ell, who as a young child had traveled with his mother Shoofly on Comer’s schooners. The largest Sadlermiut archaeological site on the island is the Native Point site, located at the mouth of Native Bay.

Geologically, Southampton Island holds resources of scientific and industrial interest, but the Nunavut government notes that knowledge of the island remains incomplete. Current basic geoscience is insufficient for exploration demands. Regional bedrock mapping has not been updated since 1969, and the existing map only makes very broad rock distinctions. Understanding of surficial geology is rudimentary, and there is no publicly available regional-scale till geochemical data—information essential for assessing potential for metals and diamonds.

The island is separated from the Melville Peninsula by Frozen Strait. Other surrounding waterways include Roes Welcome Sound to the west, Bay of Gods Mercy in the southwest, Fisher Strait in the south, Evans Strait in the southeast, and Foxe Channel in the east. Hansine Lake lies in the far north, and Bell Peninsula is in the southeast. The highest point is Mathiassen Mountain, part of the Porsild Mountains. The island’s shape is vaguely similar to that of Newfoundland.

Southampton Island has a subarctic climate (Köppen Dfc) that transitions into a tundra climate (ET). Like nearly all of Nunavut, it is entirely above the tree line. Coral Harbour has never recorded a temperature above freezing in January, February, or March (though March has reached 0.0 °C). Because Hudson Bay remains frozen, there is a severe seasonal lag into June, especially compared to more continental areas like Fairbanks, despite abundant sunshine and near-constant twilight at night. As solar strength wanes and warm water is absent even in summer, temperatures drop rapidly as September approaches. Cold extremes are severe, but comparable to many areas farther south in Canada’s interior.

The island hosts two migratory bird sanctuaries: Qaqsauqtuuq and Ikkattuaq, both important breeding sites for the lesser snow goose (*Anser caerulescens caerulescens*). Two Important Bird Areas (IBAs) are also located here: the Boas River wetlands in the southwest and East Bay/Native Bay in the southeast. Together, these sites support over 10% of the world’s snow goose population, with the Boas River area alone hosting more than 500,000 nesting individuals. Smaller but significant colonies of brent goose (*Branta bernicla*) and other polar bird species also occur. Southampton Island is one of two main summering grounds for bowhead whales in Hudson Bay.