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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EST 18 January 2026

Today Tonight and Monday.

Gale warning in effect.

Wind southwest 20 knots diminishing to southwest 15 this afternoon then increasing to southwest 20 this evening. Wind increasing to southwest 35 Monday afternoon.

Flurries. Visibility 1 mile or less in flurries.

Freezing spray warning in effect.

Freezing spray ending near noon. Risk of freezing spray early this afternoon. Risk of freezing spray overnight and Monday. Freezing spray beginning Monday afternoon.

Waves

Issued 10:30 AM EST 18 January 2026
Today Tonight and Monday. Waves 2 to 3 metres subsiding to 1 to 1.5 near noon and to 0.5 to 1 early this evening. Waves building to 1 to 1.5 near midnight and to 2 to 3 Monday afternoon.

Extended Forecast

Issued 03:00 AM EST 18 January 2026
Tuesday Wind southwest 30 knots.
Wednesday Wind southwest 25 knots.
Thursday Wind southwest 30 knots.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Burlington Lift Bridge Oshawa Executive Airport Point Pelee Peterborough Municipal Airport Point Petre Hamilton Munro Int'l Airport Erieau Cobourg Toronto City Centre Airport Port Colborne CFB Trenton South Lake Huron - 45149 Windsor Airport Great Duck Island Gore Bay-Manitoulin Airport North Bay Airport Greater Sudbury Airport Killarney Sault Ste. Marie Airport Ajax - 45159 North Channel - 45154 Lake Nipissing - 45152 Lake Simcoe - 45151 Welland-Pelham Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Vineland Station Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Cove Island Goderich Sarnia Chris Hadfield Airport Western Islands Tobermory Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal
Legend:
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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 16 May 2025 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Gale warning in effect

Western Lake Ontario

Issued 10:30 AM EST 18 January 2026

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.

Freezing spray warning in effect

Western Lake Ontario

Issued 10:30 AM EST 18 January 2026

Moderate or severe freezing spray is 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 or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EST 18 January 2026 Today Tonight and Monday At 10:30 a.m. EST today departing low 1007 mb located over central
Quebec.

At 10:30 a.m. EST today dissipating ridge located on a line
northeast-southwest over northeastern Ontario.

At 10:30 a.m. EST today low 1011 mb located south of Lake of
the Woods.
By 10:30 a.m. EST Monday low 1001 mb located over northern Lake
Huron.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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