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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 30 April 2025

Today Tonight and Thursday.

Wind north 15 knots diminishing to variable 10 early this morning then becoming light early this evening. Wind becoming southeast 10 overnight then increasing to east 15 near noon Thursday. Wind backing to northeast 20 Thursday afternoon.

Showers and fog patches Thursday afternoon and evening.

Waves

Issued 03:00 AM EDT 30 April 2025
Today Tonight and Thursday. Waves 1 metre subsiding to 0.5 or less this morning then building to 1 Thursday afternoon.

Extended Forecast

Issued 03:00 AM EDT 30 April 2025
Friday Wind northeast 15 knots backing to northwest 15 in the morning.
Saturday Wind light.
Sunday Wind northwest 15 knots diminishing to light late in the day.

Ice Forecast*

Issued 12:00 PM EDT 29 April 2025 Today Tonight and Wednesday Open water.

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

 

[ Canadian Ice Service ]

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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

Issued 12:00 PM EDT 29 April 2025 Today Tonight and Wednesday

Ice Coverage

Open water.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 30 April 2025 Today Tonight and Thursday At 3:00 a.m. EDT today departing trough located on a line
northeast-southwest over eastern Ontario.

At 3:00 a.m. EDT today high 1025 mb located over Lake Superior.
By 3:00 a.m. EDT Thursday high 1024 mb located over western Quebec.

By 3:00 a.m. EDT Thursday approaching low 1005 mb located over
Missouri.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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