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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 12 October 2026

Tonight and Tuesday.

Strong wind warning in effect.

Wind northeast 15 knots increasing to northeast 20 this evening then diminishing to northeast 15 early Tuesday morning. Wind diminishing to variable 10 near noon Tuesday then increasing to northwest 15 Tuesday evening.

Scattered showers tonight and Tuesday with a risk of thunderstorms. Fog patches forming Tuesday morning and dissipating Tuesday afternoon.

Waves

Issued 06:30 PM EDT 12 October 2026
Tonight and Tuesday. Waves 0.5 to 1 metre building to 1 to 1.5 near midnight then subsiding to 0.5 to 1 Tuesday morning. Waves subsiding to 0.5 or less Tuesday afternoon then building to 0.5 to 1 Tuesday evening.

Extended Forecast

Issued 06:30 PM EDT 12 October 2026
Wednesday Wind northwest 15 knots increasing to northwest 20 in the morning.
Thursday Wind northeast 15 knots veering to southeast 15.
Friday Wind light increasing to northwest 35 knots.

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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
Legend:
buoy Buoy
land station Land Station
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

Northern Georgian Bay

Issued 00:33 AM EDT 13 October 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 13 October 2026 Today Tonight and Wednesday At 3:00 a.m. EDT today ridge located on a line east-west over
James Bay.
By 3:00 a.m. EDT Wednesday ridge located on a line
northwest-southeast over eastern Quebec.

At 3:00 a.m. EDT today low 1002 mb located over Wisconsin.
By 3:00 a.m. EDT Wednesday low 1006 mb located over the St. Lawrence
River.

By 3:00 a.m. EDT Wednesday low 990 mb located over Hudson Bay.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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