Lake Sunapee Ice Out History

Ice out on Lake Sunapee is determined by the ability to navigate from one end of the lake to the other - from Georges Mills to Newbury Harbor. The Osborne family, longtime Sunapee residents, has taken on this task of navigating the 8-mile-long lake in springtime when the ice breaks up enough for their boat to make the trip end-to-end. Ice Out data has been collected since 1869, and recently, LSPA started collecting ice in data as well to keep track of regional climate changes. As you can see, there is a downward trend on the graph, which generally represents earlier ice outs.