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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 28 July 2026

Today Tonight and Wednesday.

Strong wind warning in effect.

Wind southwest 10 knots increasing to northwest 15 this afternoon and to north 20 late overnight. Wind veering to northeast 20 near noon Wednesday.

Scattered showers with a risk of thunderstorms.

Waves

Issued 10:30 AM EDT 28 July 2026
Today Tonight and Wednesday. Waves 0.5 to 1 metre subsiding to 0.5 or less near noon then building to 0.5 to 1 early this evening. Waves building to 1 to 1.5 early Wednesday morning.

Extended Forecast

Issued 03:00 AM EDT 28 July 2026
Thursday Wind north 15 knots diminishing to light in the afternoon.
Friday Wind light.
Saturday Wind light.

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Map of Great Lakes - Lake Huron marine weather areas Erieau CFB Trenton Muskoka Airport Parry Sound Harbour Toronto City Centre Airport Lake Simcoe Regional Airport Wiarton Airport Point Petre Lagoon City Western Islands Cobourg Port Colborne Windsor Airport Point Pelee Welland-Pelham Vineland Station Burlington Lift Bridge Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Harrow AAFC Hamilton Munro Int'l Airport Tobermory Sarnia Chris Hadfield Airport Oshawa Executive Airport Collingwood Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Peterborough Municipal Airport Brockville Grenadier Island Kingston Airport
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land station Land Station
Ice Conditions

*Ice Forecast and Warnings also apply to U.S. waters

Ice Forecasts

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 10:30 AM EDT 28 July 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 28 July 2026 Today Tonight and Wednesday At 10:30 a.m. EDT today low 1001 mb located over Lake Ontario.
By 10:30 a.m. EDT Wednesday low 1001 mb located over northern New
York State.

At 10:30 a.m. EDT today ridge located on a line north-south over
western Lake Superior.
By 10:30 a.m. EDT Wednesday ridge located from James Bay to
Illinois.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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