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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 17 March 2026

Today Tonight and Wednesday.

Gale warning in effect.

Wind southwest 35 knots diminishing to west 25 this morning and to west 10 to 15 near midnight. Wind becoming southwest 10 Wednesday morning then increasing to south 15 near noon Wednesday.

Scattered flurries ending this evening. Scattered flurries Wednesday evening with a risk of freezing drizzle. Visibility as low as 1 mile in flurries.

Freezing spray warning in effect.

Over open water freezing spray ending this evening.

Waves

Issued 03:00 AM EDT 17 March 2026
Today Tonight and Wednesday. Waves 2 metres subsiding to 1 to 1.5 early this evening and to 0.5 Wednesday morning. Waves building to 0.5 to 1 Wednesday afternoon.

Extended Forecast

Issued 03:00 AM EDT 17 March 2026
Thursday Wind southwest 15 knots diminishing to light in the afternoon.
Friday Wind light.
Saturday Wind east 10 to 15 knots becoming light.

Ice Forecast*

Issued 12:00 PM EDT 16 March 2026 Today Tonight and Tuesday Open water.

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

 

[ Canadian Ice Service ]

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

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

Ice Forecasts

Issued 12:00 PM EDT 16 March 2026 Today Tonight and Tuesday

Ice Coverage

Open water.

Warnings

Warnings (In effect)

Gale warning in effect

Western Lake Ontario

Issued 03:00 AM EDT 17 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.

Freezing spray warning in effect

Western Lake Ontario

Issued 03:00 AM EDT 17 March 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 3:00 AM EDT 17 March 2026 Today Tonight and Wednesday At 3:00 a.m. EDT today low 977 mb located over central Quebec.
By 3:00 a.m. EDT Wednesday departing low 953 mb located over
northern Quebec.

At 3:00 a.m. EDT today ridge located on a line north-south over
Lake of the Woods.
By 3:00 a.m. EDT Wednesday ridge located on a line north-south
over northern Ontario.

Great Lakes - Lake Huron Area

Another Region

Marine Weather for Canada

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