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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 05 October 2026

Today Tonight and Tuesday.

Strong wind warning in effect.

Wind northwest 25 knots diminishing to northwest 15 overnight and to west 10 near noon Tuesday. Wind backing to southwest 10 Tuesday evening.

Scattered showers ending this evening. Risk of thunderstorms this morning. Risk of waterspouts this afternoon and this evening.

Waves

Issued 03:00 AM EDT 05 October 2026
Today Tonight and Tuesday. Waves 1 metre building to 2 early this morning then subsiding to 1.5 early this evening. Waves subsiding to 1 Tuesday morning and to 0.5 or less Tuesday afternoon.

Extended Forecast

Issued 03:00 AM EDT 05 October 2026
Wednesday Wind southwest 15 knots increasing to southwest 25 in the morning then diminishing to west 15 late in the day.
Thursday Wind west 15 knots increasing to west 25 late in the day.
Friday Wind west 20 knots diminishing to light late in the day.

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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 03:00 AM EDT 05 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 3:00 AM EDT 5 October 2026 Today Tonight and Tuesday At 3:00 a.m. EDT today low 995 mb located over southern James Bay.
By 3:00 a.m. EDT Tuesday departing low 990 mb located over eastern
Quebec.

At 3:00 a.m. EDT today ridge located on a line north-south over
eastern Manitoba.
By 3:00 a.m. EDT Tuesday ridge located over Lake Huron.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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