Ice Coverage Records

In this section, we look at the ice seasons for different regions, when the extent and concentration of ice was at its record high or record low. In the north, the statistics for the season are from May 14 to October 15. In the south, the season begins in the fall when the ice first forms, and continues into the following spring or early summer when the ice melts.

The first table gives the information for the five main areas that the Canadian Ice Service monitors. We call them the Regional areas. The second table is for other areas of interests, either combined Regional areas, or specific areas.

To see the details of each listed area, click on the region’s name. There you will find graphs that show the weekly ice coverage during the recorded season, and a graph showing the comparative ice extent over the past several years.

Regional Areas
RegionSeason of Minimum Ice CoverageSeason of Maximum Ice CoverageAnnual Ice Coverage
Western Arctic201219691968-2016
Eastern Arctic201119721968-2016
Hudson Bay197419721971-2016
East Coast2009-20101989-19901969-2016
Great Lakes2011-20121978-19791973-2016

 

Areas of Interest
RegionSeason of Minimum Ice CoverageSeason of Maximum Ice CoverageAnnual Ice Coverage
Northern Canadian Waters201219831971-2016
Canadian Arctic201219721971-2016
Northwest Passage201219781968-2016
Beaufort Sea201219691968-2016
Gulf of St. Lawrence2009-20102002-20031969-2016
East Newfoundland Waters2009-20101989-19901969-2016
Lake Ontario2001-20021978-19791973-2016
Lake Erie1997-19981977-19781973-2016
Lake Michigan2001-20021976-19771973-2016
Lake Huron2011-20121993-19941973-2016
Lake Superior2011-20121995-19961973-2016
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