The monthly average levels are based on a network of water level gages located around the lakes. Water levels have been coordinated through 2023. Values highlighted in gray are provisional.
Lake Ontario Water Level
The Drought Monitor focuses on broad-scale conditions. Local conditions may vary. See accompanying text summary for forecast statements.
Water Levels - International Joint Commission
Lake Ontario Outflow Changes; Weekly Regulation Summary; Recent & Expected Conditions . Water Levels; Flows; Forecasts; About the Basin . Basin Map; A visual tour of System; Visual history of the project; Lake St. Lawrence; Learn More . 2017 and 2019 High Water Events; Frequently Asked Questions; Learning Modules; Library . Publications ...
The Great Lakes Water Level Dashboard - National Oceanic and ...
Great Lakes water levels constitute one of the longest high quality hydrometeorological data sets in North America with reference gauge records beginning about 1860 with sporadic records back to the early 1800's. These levels are collected and archived by NOAA's National Ocean Service.
Forecasted February 7th water levels for Lakes Superior, Michigan-Huron, St. Clair, Erie, and Ontario are below levels of a month ago by 4, 2, 9, 4 and 1 inch, respectively. Predicted...
Lakewide average levels are based on a network of water level gages located around the lakes. LTA and record levels are computed from a period of record of 1918 to 2023 Elevations are...
Monthly Water Level Bulletin for the Great Lakes and Montréal
The monthly mean levels for the previous year and current year shown on the following charts are the average of water levels recorded at a network of gauging stations on each lake. Historical data from these networks are used to determine the all-time …
Water Levels: NOAA Great Lakes Environmental Research …
NOAA water level observations are available at specific locations, as described on the Monitoring Network page or as a lake-wide average. These lake-wide averages are based on a select set of U.S. and Canadian station data as determined by the Coordinating Committee.
Port of Oswego
Oswego is the first deep water port on the Great Lakes and like all Great Lakes Ports, the water level elevations have seasonal variations due to meteorological conditions, snow melt off, rain, wind and barometric pressure.
Historical Monthly Mean Water Levels from the Coordinated
Monthly mean water levels in metres referred to IGLD 1985 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct ... Historical Monthly Mean Water Levels from the Coordinated network for Lake Ontario. Monthly mean water levels in metres referred to IGLD 1985 ... Water levels in metres referred to Chart Datum. 2023: 0.45: 0.56: 0.68: 0.93: 1.16: 1.04: 0 ...