International St. Lawrence River Board of Control
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Data

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Real-Time Water Levels Data

Port Weller, Ontario Burlington, Ontario Toronto, Ontario Cobourg, Ontario Kingston, Ontario Brockville, Ontario Iroquios Above, Ontario Iroquios Below, Ontario Morrisburg, Ontario Cornwall, Ontario Summerstown, Ontario Ogdensburg, New York Oswego, New York Olcott, New York Alexandria Bay, New York Cape Vincent, New York Rochester, New York Lac St. Louis/Pointe Claire, Québec Montréal / Lasalle, Québec Lanoraie, Québec

Fisheries and Oceans Canada National Oceanic and Atmospheric Administration Centre d’expertise hydrique du Québec
(Stations marked in red) (Stations marked in blue) (Stations marked in green)

Additional Water Level Data

Lake Ontario Outflow Changes

Six-Month Forecasts

Historical Data

Marine Weather Forecasts

Water Levels by Telephone

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