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Northern Lake Huron

Forecast

Marine Forecast

Issued 10:30 AM EDT 12 July 2025

Today Tonight and Sunday.

Strong wind warning in effect.

Wind south 15 knots increasing to south 20 this afternoon then diminishing to southwest 15 this evening. Wind diminishing to west 10 late overnight then backing to southwest 10 near noon Sunday. Wind backing to south 10 Sunday evening.

Showers ending Sunday morning with a risk of thunderstorms. Fog patches.

Waves

Issued 10:30 AM EDT 12 July 2025
Today Tonight and Sunday. Waves 0.5 to 1 metre building to 1 to 1.5 early this evening then subsiding to 0.5 to 1 near midnight. Waves subsiding to 0.5 or less early Sunday morning.

Extended Forecast

Issued 03:00 AM EDT 12 July 2025
Monday Wind light becoming southwest 15 knots in the afternoon then diminishing to light late in the day.
Tuesday Wind light.
Wednesday Wind light becoming northeast 15 knots late in the day.

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Weather Conditions

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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

Lake Huron

Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.

Ice Forecasts

Lake Michigan

Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Squall warning in effect

Northern Lake Huron

Issued 11:41 AM EDT 12 July 2025 Squalls with wind gusts up to 35 knots, frequent lightning and poor to very poor visibility in thunderstorms heavy at times are expected or occurring in the area.

Thunderstorms are tracking from the southwest at 25 knots.

Proceed with caution as visibility may suddenly be reduced to near zero. Vessels without lightning protection should make their way to shore immediately. Mariners are advised to prepare for squalls. If underway, seek safe harbour immediately.

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

Northern Lake Huron

Issued 10:30 AM EDT 12 July 2025

'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 or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 12 July 2025 Today Tonight and Sunday At 10:30 a.m. EDT today trough located on a line north-south over
Lake Superior.
By 10:30 a.m. EDT Sunday trough located on a line north-south over
eastern Ontario.

At 10:30 a.m. EDT today ridge located on a line north-south over
South Dakota.
By 10:30 a.m. EDT Sunday ridge located on a line north-south
over Illinois.

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