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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 08 August 2026

Today Tonight and Sunday.

Strong wind warning in effect.

Wind south 15 knots veering to southwest 15 early this morning then to west 15 this afternoon. Wind increasing to northwest 20 this evening then diminishing to northwest 15 overnight. Wind diminishing to southwest 10 Sunday morning then increasing to southwest 15 Sunday afternoon.

Scattered showers ending this evening with a risk of thunderstorms.

Waves

Issued 03:00 AM EDT 08 August 2026
Today Tonight and Sunday. Waves 0.5 to 1 metre subsiding to 0.5 or less near noon Sunday then building to 0.5 to 1 Sunday evening.

Extended Forecast

Issued 03:00 AM EDT 08 August 2026
Monday Wind light becoming west 15 knots in the afternoon.
Tuesday Wind northwest 15 knots diminishing to light.
Wednesday Wind light.

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Map of Great Lakes - Lake Huron marine weather areas Erieau CFB Trenton Muskoka Airport Parry Sound Harbour Toronto City Centre Airport Lake Simcoe Regional Airport Wiarton Airport Point Petre Lagoon City Western Islands Cobourg Port Colborne Windsor Airport Point Pelee Welland-Pelham Vineland Station Burlington Lift Bridge Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Harrow AAFC Hamilton Munro Int'l Airport Tobermory Sarnia Chris Hadfield Airport Oshawa Executive Airport Collingwood Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Peterborough Municipal Airport Brockville Grenadier Island Kingston Airport
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Ice Conditions

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

Ice Forecasts

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

Warnings (In effect)

Strong wind warning in effect

Georgian Bay

Issued 07:03 AM EDT 08 August 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 Georgian Bay

Issued 07:22 AM EDT 08 August 2026 Conditions are favourable for the development of squalls with wind gusts up to 40 knots, frequent lightning and hail.

Showers and thunderstorms are expected to track east across the region this morning, Squalls with wind gusts up to 40 knots and hail up to quarter size are possible.

Vessels without lightning protection should make their way to shore immediately. 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 3:00 AM EDT 8 August 2026 Today Tonight and Sunday At 3:00 a.m. EDT today quasi-stationary high 1023 mb located over
the East Coast of the U.S.

At 3:00 a.m. EDT today cold front located on a line
northeast-southwest over Whitefish Bay.
By 3:00 a.m. EDT Sunday cold front located on a line north-south
over Montréal.

At 3:00 a.m. EDT today ridge from high located on a line
northwest-southeast over southern Minnesota.
By 3:00 a.m. EDT Sunday ridge from high located on a line
north-south over Lake Huron.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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