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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 20 January 2026

Today Tonight and Wednesday.

Wind west 30 knots backing to southwest 30 early this evening then diminishing to southwest 20 overnight. Wind increasing to southwest 25 near noon Wednesday.

Flurries changing to snow Wednesday morning. Visibility 1 mile or less in snow.

Freezing spray warning in effect.

Freezing spray ending early Wednesday morning. Risk of freezing spray late Wednesday morning and early Wednesday afternoon.

Waves

Issued 03:00 AM EST 20 January 2026
Today Tonight and Wednesday. Waves 2 to 3 metres subsiding to 1 to 1.5 Wednesday morning then building to 2 Wednesday afternoon.

Extended Forecast

Issued 03:00 AM EST 20 January 2026
Thursday Wind southwest 25 knots increasing to southwest 30 in the morning.
Friday Wind west 30 knots.
Saturday Wind northwest 20 knots diminishing to light late in the day.

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

Freezing spray warning in effect

Western Lake Ontario

Issued 03:00 AM EST 20 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 3:00 AM EST 20 January 2026 Today Tonight and Wednesday At 3:00 a.m. EST today departing low 1002 mb located over central
Quebec.

At 3:00 a.m. EST today ridge located from Iowa to Saskatchewan.
By 3:00 a.m. EST Wednesday high 1037 mb located over West Virginia.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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