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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 15 January 2026

Today Tonight and Friday.

Wind north 20 knots backing to northwest 20 early this morning then diminishing to northwest 15 near noon. Wind increasing to northwest 20 this evening then diminishing to northwest 15 Friday morning. Wind backing to southwest 15 near noon Friday then to south 15 Friday evening.

Snow changing to scattered flurries this afternoon and ending this evening. Flurries Friday late in the day. Visibility 1 mile or less in precipitation.

Risk of freezing spray this morning. Risk of freezing spray overnight and Friday morning.

Waves

Issued 03:00 AM EST 15 January 2026
Today Tonight and Friday. Waves 1 to 1.5 metres subsiding to 0.5 to 1 this afternoon then building to 1 to 1.5 near midnight. Waves subsiding to 0.5 to 1 Friday morning.

Extended Forecast

Issued 03:00 AM EST 15 January 2026
Saturday Wind southwest 15 knots increasing to southwest 20 in the afternoon.
Sunday Wind southwest 25 knots.
Monday Wind southwest 25 knots increasing to southwest 30.

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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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EST 15 January 2026 Today Tonight and Friday At 3:00 a.m. EST today low 994 mb located south of Ontario.
By 3:00 a.m. EST Friday low 987 mb located over New Brunswick.

At 3:00 a.m. EST today ridge located on a line northeast-southwest
over northwestern Ontario.
By 3:00 a.m. EST Friday ridge located on a line north-south over
northeastern Ontario.

At 3:00 a.m. EST today trough located on a line north-south over
Saskatchewan.
By 3:00 a.m. EST Friday trough located on a line north-south over
northwestern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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