Water Levels & Forecasts

Monthly Mean Water Levels

Canadian Hydrographic Service

US Army Corps of Engineers



Monthly forecasts of projected Great Lakes levels are jointly produced by Environment and Climate Change Canada and the U.S. Army Corps of Engineers, Detroit District, under the auspices of the Coordinating Committee on Great Lakes Basic Hydraulic and Hydrologic Data.  These bi-nationally coordinated six-month forecasts are published in monthly bulletins through the responsible agencies in both Canada and the United States: