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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 13 March 2026

Today Tonight and Saturday.

Gale warning in effect.

Wind southeast 15 knots increasing to southeast 25 this afternoon then veering to southwest 30 early this evening. Wind increasing to southwest 35 late this evening then veering to west 35 late overnight. Wind diminishing to west 25 Saturday morning and to west 15 Saturday afternoon. Wind diminishing to north 10 Saturday evening.

Snow changing to showers or flurries this afternoon then to flurries overnight and ending Saturday morning. Visibility 1 mile or less in snow.

Waves

Issued 10:30 AM EDT 13 March 2026
Today Tonight and Saturday. Waves 0.5 metres or less building to 1 near noon and to 2 early this evening. Waves building to 3 to 4 near midnight then subsiding to 2 near noon Saturday.

Extended Forecast

Issued 03:00 AM EDT 13 March 2026
Sunday Wind light increasing to east 20 knots in the morning and to south 30 late in the day.
Monday Wind south 30 knots increasing to southwest 35 late in the day.
Tuesday Wind southwest 35 knots diminishing to northwest 25 late in the day.

Ice Forecast*

Issued 12:00 PM EDT 13 March 2026 Today Tonight and Saturday Open water.

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

 

[ Canadian Ice Service ]

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas CFB Trenton Port Colborne - 45142 Hamilton Munro Int'l Airport Oshawa Executive Airport Port Stanley - 45132 Lake Nipissing - 45152 Point Petre Georgian Bay - 45137 Toronto City Centre Airport Lake Simcoe - 45151 South Georgian Bay - 45143 Prince Edward Point - 45135 Peterborough Municipal Airport South Lake Huron - 45149 Collingwood Lake St Clair - 45147 Grimsby - 45139 Goderich Lagoon City Kingston Airport Muskoka Airport Parry Sound Harbour Grenadier Island Lake Simcoe Regional Airport Wiarton Airport Brockville Western Islands Cove Island Great Duck Island North Channel - 45154 Sarnia Chris Hadfield Airport Gore Bay-Manitoulin Airport Tobermory Harrow AAFC Long Point North Bay Airport Port Weller St. Catharines / Niagara District Airport Greater Sudbury Airport Southeast Shoal Vineland Station Port Colborne Erieau Cobourg Sault Ste. Marie Airport Windsor Airport Welland-Pelham Killarney Ajax - 45159 Point Pelee Burlington Lift Bridge
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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 13 March 2026 Today Tonight and Saturday

Ice Coverage

Open water.

Warnings

Warnings (In effect)

Gale warning in effect

Western Lake Ontario

Issued 10:30 AM EDT 13 March 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.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 13 March 2026 Today Tonight and Saturday At 10:30 a.m. EDT today departing ridge located on a line
north-south over Vermont.

At 10:30 a.m. EDT today low 987 mb located over northern Lake
Michigan.
By 10:30 a.m. EDT Saturday low 1006 mb located near Montréal.

At 10:30 a.m. EDT today ridge located on a line north-south over
North Dakota.
By 10:30 a.m. EDT Saturday ridge located on a line
northwest-southeast over Lower Michigan.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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