Great Lakes Water Level Data National Oceanic and Atmospheric Administration (NOAA) Provides preliminary water levels for each NOS station every six minutes. Elevations are in meters IGLD.
Hourly Station Levels Department of Fisheries and Oceans (DFO), Canadian Hydrographic Service CHS gauging stations' hourly water levels data and graphs for the past and current month. Elevation in meters above chart datum, referenced to IGLD (1985). Data are provisional.
Recent and Forecasted Water Levels on the Great Lakes Department of Fisheries and Oceans (DFO), Canadian Hydrographic Service Includes average monthly water levels for the previous year and the current year to date. Period of record is 1918-1996. Elevations are in meters referred to chart datum and IGLD (1985).
Tides and Water Levels Department of Fisheries and Oceans (DFO), Marine Environmental Data Service Provides last daily and latest weekly averages. Elevations are in meters IGLD.