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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 24 April 2025

Today Tonight and Friday.

Wind southeast 15 knots diminishing to variable 10 early this morning then becoming west 10 this afternoon. Wind becoming light this evening then increasing to northeast 15 Friday morning. Wind increasing to northeast 20 Friday evening.

Scattered showers ending near noon with a risk of thunderstorms. Showers overnight and Friday. Risk of thunderstorms Friday afternoon and evening. Fog patches forming early this morning.

Waves

Issued 03:00 AM EDT 24 April 2025
Today Tonight and Friday. Waves 0.5 to 1 metre subsiding to 0.5 or less this morning then building to 0.5 to 1 Friday morning. Waves building to 1 to 1.5 Friday evening.

Extended Forecast

Issued 03:00 AM EDT 24 April 2025
Saturday Wind north 25 knots diminishing to northwest 15 late in the day.
Sunday Wind northwest 15 knots diminishing to light.
Monday Wind light becoming southeast 15 knots late in the day.

Ice Forecast*

Issued 12:00 PM EDT 23 April 2025 Today Tonight and Thursday Open water except 1 tenth thick lake ice along parts of the northern shore.

*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 23 April 2025 Today Tonight and Thursday

Ice Coverage

Open water except 1 tenth thick lake ice along parts of the northern
shore.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 23 April 2025 Tonight and Thursday At 6:30 p.m. EDT tonight ridge located from Lake Ontario to
Hudson Bay.
By 6:30 p.m. EDT Thursday ridge located from the East Coast of
the U.S. to Hudson Bay.

At 6:30 p.m. EDT tonight weakening low 1012 mb located over
southwestern Lake Superior.
By 6:30 p.m. EDT Thursday weakening low 1022 mb located over
southern Quebec.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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