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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 21 July 2026
Thursday Wind northwest 15 knots diminishing to light in the morning.
Friday Wind southwest 15 knots diminishing to light late in the day.
Saturday Wind light becoming south 15 knots.

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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

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)

Squall warning in effect

Southern Lake Huron

Issued 02:46 AM EDT 21 July 2026 Squalls with wind gusts up to 45 knots and frequent lightning are expected or occurring in the area.

A line of thunderstorms is moving southeast at 40 knots across central Lake Huron.

Mariners are advised to prepare for squalls. If underway, seek safe harbour immediately. Consider delaying or postponing travel in areas under the squall warning.

Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

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 3:00 AM EDT 21 July 2026 Today Tonight and Wednesday At 3:00 a.m. EDT today trough from 991 mb low located on a line
northeast-southwest over eastern Lake Superior.
By 3:00 a.m. EDT Wednesday trough from 994 mb low located on a
line north-south over eastern Ontario.

By 3:00 a.m. EDT Wednesday ridge located on a line
northwest-southeast over North Dakota.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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