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Southern Lake Huron

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 20 July 2026

Tonight and Tuesday.

Strong wind warning in effect.

Wind south 20 knots veering to southwest 20 late overnight then to west 20 near noon Tuesday. Wind increasing to northwest 30 Tuesday evening.

Scattered showers with a risk of thunderstorms.

Waves

Issued 06:30 PM EDT 20 July 2026
Tonight and Tuesday. Waves 0.5 to 1 metre building to 1.5 this evening then subsiding to 0.5 to 1 early Tuesday morning. Waves building to 2 Tuesday evening.

Extended Forecast

Issued 03:00 AM EDT 20 July 2026
Wednesday Wind northwest 25 knots.
Thursday Wind northwest 20 knots backing to southwest 15 late in the day.
Friday Wind southwest 15 knots diminishing to light late in the day.

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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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Ice Conditions

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

Ice Forecasts

Lake Huron

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.

Ice Forecasts

Lake Michigan

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Southern Lake Huron

Issued 6:30 PM EDT 20 July 2026

'Strong' winds of 20 to 33 knots are 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.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 20 July 2026 Tonight and Tuesday At 6:30 p.m. EDT tonight low 995 mb located over northern Ontario.
By 6:30 p.m. EDT Tuesday low 994 mb located over northern Quebec.

At 6:30 p.m. EDT tonight trough from low located over western
Lake Superior.
By 6:30 p.m. EDT Tuesday trough from low located over North Channel.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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