Tides, Currents, and Water Levels
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Water Level at Your Fingertips!
Vertical Control Benchmarks
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Sites of Interest
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St.Lawrence Observatory
Tides and Currents
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Tides, Currents, and Water Levels Canadian Hydrographic Service

Ocean forecast for the Estuary and Gulf of St. Lawrence
St. Lawrence Observatory (OSL)
Current and recent water level (observations)
Water levels at your finger tips! (1-877-775-0790) and voice announcing water level for gauging stations
Water levels of Great Lakes and Arctic Regions
Water levels of Pacific Region
Water level forecasts (some include plots of average levels, record levels, and recent levels)
Canadian water level bulletin – Great Lakes and Montreal Harbour
Water level bulletin – St. Lawrence River
Historic water levels
Great Lakes water level graphs
National archives of Tide and Water Level
Great Lakes Data (Water levels)
The Canadian Hydrographic Service, Central and Arctic Region
Environment Canada (Great Lakes - St. Lawrence River Water Levels)
International Joint Commission (IJC)
Great Lakes Information Network (GLIN)
Data for the St. Lawrence River tributaries
Environnement Québec
Ottawa River Regulation Planning Board
Water level for the Fraser River
AVADepth – forecast of available water depths for vessels navigating the Fraser River South Arm Channel (Canadian Coast Guard – Pacific region)
Informations on Tides and Currents
Rip currents … a threat to life!
NOAA Rip currents
Hydrodynamique marine
(École Nationale Supérieure d’Électrotechnique, d’Électronique, d’Informatique, d’Hydraulique et des Télécommunications - French only)
Other sites of interest for currents and water levels
The Atlas of Canada – Canadian Tides
Marine Environmental Data Service (MEDS)
International Hydrographic Organisation (IHO)
National Oceanic & Atmospheric Administration (NOAA)
US Army Corps of Engineers
Service hydrographique et Océanographique de la Marine (SHOM)
(French only)
Admiralty – United Kingdom Hydrographic Office (UKHO)
Nautical Data International (NDI)
Great Lakes Commission
The Great Lakes Forecasting System (GLFS)
Great Lakes St. Lawrence Seaway System
Reviewed: 2005-11-18 to top of page