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.