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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 14 October 2026

Today Tonight and Thursday.

Strong wind warning in effect.

Wind northwest 15 knots except northwest 20 near the east end today. Wind becoming north 15 near midnight then veering to northeast 15 early Thursday morning. Wind increasing to east 20 near noon Thursday.

Scattered showers ending this afternoon.

Waves

Issued 10:30 AM EDT 14 October 2026
Today Tonight and Thursday. Waves 0.5 to 1 metre except 1 to 1.5 near the east end this evening. Waves building to 1 to 1.5 Thursday afternoon.

Extended Forecast

Issued 05:02 AM EDT 14 October 2026
Friday Wind southeast 15 knots becoming north 15 in the morning then increasing to north 30 late in the day.
Saturday Wind north 30 knots diminishing to northwest 20.
Sunday Wind west 20 knots.

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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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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

Western Lake Ontario

Issued 10:30 AM EDT 14 October 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 14 October 2026 Today Tonight and Thursday At 10:30 a.m. EDT today departing low 1006 mb located south
of Maine.

At 10:30 a.m. EDT today high 1024 mb located over North Dakota.
By 10:30 a.m. EDT Thursday high 1028 mb located over northeastern
Ontario.

By 10:30 a.m. EDT Thursday low 1014 mb located over southern
Manitoba.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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