St. Lawrence River and Gulf - Tides, Water Levels and Currents
Water Level Predictions, Forecasts and Observations
Canadian Hydrographic Service water level stations by zone
The Tide Tables are published by the Canadian Hydrographic Service. They provide predicted times and heights of the high and low waters associated with the vertical movement of the tide. The tide predictions are available in table, graphic and text formats for over seven hundred stations in Canada.
Canadian Coast Guard Water Level Forecasts
These forecasts, produced by the Canadian Coast Guard, give the expected minimum water levels in Montréal, Sorel and Trois-Rivières. Information on average water level on the Lake Ontario and Ottawa river outflow is also available.
Forecasts for the Estuary and the Gulf of St. Lawrence
Data calculated by the Canadian Hydrographic Service and available on the St. Lawrence Global Observatory's website.
Real-Time Water Level Observations
The following stations have water level observations available in table, graphic and text formats. Water levels are preliminary and subject to revision.
Montréal to Trois-Rivières
- Montréal, Jetée #1
- Montréal, rue Frontenac
- Contrecoeur IOC
- Lac St. Pierre
Trois-Rivières to Québec
- Port de Québec
- Saint-François, Île d’Orléans
Québec to Escoumins
Gulf of St. Lawrence
These Web services were developed by the Canadian Hydrographic Service to provide access to official water level data.
The Current Tables are published by the Canadian Hydrographic Service. They provide predicted times for slack water and the times and velocities of maximum current, all of which are associated with the horizontal movement of the tide.
Atlas of Tidal Currents
Tidal Current Atlases published by the Canadian Hydrographic Service present a comprehensive view of the hourly rate and direction of major tidal currents within specific coastal regions of Canada.
These Web services were developed by the Canadian Hydrographic Service to provide access to official surface currents data.
Tides and Water Levels Historical Data
Station information, digital data inventory of observed water level data available for download.
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