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Northern Lake Huron

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 18 July 2026

Today Tonight and Sunday.

Strong wind warning in effect.

Wind west 20 knots veering to northwest 25 near noon then to north 20 early this evening. Wind diminishing to north 15 near midnight and to north 10 Sunday morning. Wind backing to northwest 10 near noon Sunday then to southwest 10 Sunday evening.

Scattered showers this morning with a risk of thunderstorms. Smoke. Visibility as low as 1 mile in smoke.

Waves

Issued 10:30 AM EDT 18 July 2026
Today Tonight and Sunday. Waves 0.5 to 1 metre building to 2 near noon then subsiding to 1 to 1.5 this evening. Waves subsiding to 0.5 to 1 late overnight and to 0.5 or less near noon Sunday.

Extended Forecast

Issued 03:00 AM EDT 18 July 2026
Monday Wind southwest 15 knots increasing to southwest 20 in the afternoon.
Tuesday Wind southwest 20 knots veering to northwest 25.
Wednesday Wind northwest 20 knots.

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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

Northern Lake Huron

Issued 10:30 AM EDT 18 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.

Watches (In effect)

Squall watch in effect

Northern Lake Huron

Issued 08:55 AM EDT 18 July 2026 Conditions are favourable for the development of squalls with wind gusts up to 45 knots.

Thunderstorms producing strong wind gusts could move over the area this morning and afternoon. The strongest wind gusts are expected early this afternoon, however, thunderstorms this morning may also have strong wind gusts.

Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway. Consider delaying or postponing travel in areas under the Squall Watch.

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

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 18 July 2026 Today Tonight and Sunday At 10:30 a.m. EDT today low 999 mb located north of Lake Nipissing.
By 10:30 a.m. EDT Sunday low 986 mb located over eastern Quebec.

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

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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