Great Lakes water levels and related data

Information on Great Lakes water levels is available from several agencies in the United States and Canada. This Web page contains links to a number of official Web sites containing Great Lakes water level and related data. 

Government of Canada newsletters

• LEVELnews

Current and recent water level data

• Daily water levels for the current month
• Monthly and daily water levels
• Water levels at United States gauges
• Hourly water levels at Canadian gauges
• Weekly water level bulletin
• Telephone numbers for present levels at Canadian gauges

Water level forecasts

• Canadian monthly water level bulletin - Great Lakes and Montréal Harbour
• United States monthly water level bulletin - Great Lakes
• United States weekly water level forecast

Historical water levels

• Historical monthly mean water levels

Flows in connecting channels

• Lake Superior and Lake Ontario outflows

Precipitation data

• Daily precipitation by Great Lake basin

Wave and wind data

• Marine weather for Lake Superior
• Marine weather for Lake Huron
• Marine weather for Lake Erie and Lake Ontario
• Text bulletin wave height forecasts for the Great Lakes and St. Lawrence River
• Recent data at wave buoys and wind data at shore stations

Ice cover

• Government of Canada - Canadian ice service
• United States National Ice Center

Water temperature

• Great Lakes statistics (surface water temperature and ice concentration)
• Recent data at wave buoys

Other links of interest

• Coordinating committee on Great Lakes basic hydraulic and hydrologic data
• Quarterly Climate Impacts and Outlook
• International Joint Commission
  
• International Lake Superior Board of Control
  
• International Lake Ontario - St. Lawrence River Board
  
• International Niagara Board of Control
  
• International Upper Great Lakes Study Board