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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 12 April 2026

Tonight and Monday.

Wind east 15 knots diminishing to variable 10 this evening then increasing to southwest 15 near midnight. Wind increasing to southwest 20 late overnight and to southwest 25 Monday morning.

Scattered showers this evening. Scattered showers Monday. Risk of thunderstorms early Monday evening. Fog patches forming Monday morning.

Waves

Issued 06:30 PM EDT 12 April 2026
Tonight and Monday. Waves 0.5 to 1 metre building to 1.5 near noon Monday then subsiding to 1 Monday evening.

Extended Forecast

Issued 06:30 PM EDT 12 April 2026
Tuesday Wind light becoming southwest 15 knots in the morning.
Wednesday Wind southwest 15 knots diminishing to light late in the day.
Thursday Wind light becoming southwest 15 knots late in the day.

Ice Forecast*

Issued 12:00 PM EDT 12 April 2026 Today Tonight and Monday Ice free.

*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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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 12 April 2026 Today Tonight and Monday

Ice Coverage

Ice free.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 12 April 2026 Tonight and Monday At 6:30 p.m. EDT tonight low 995 mb located over northwestern
Ontario.
By 6:30 p.m. EDT Monday trough from 972 mb low located on a line
northeast-southwest over southern Ontario.

By 6:30 p.m. EDT Monday building ridge located over northern
Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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