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Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 12 March 2025

Today Tonight and Thursday.

Wind east 10 knots increasing to southeast 15 this morning then diminishing to southeast 10 overnight. Wind becoming light near noon Thursday.

Waves

Issued 03:00 AM EDT 12 March 2025
Today Tonight and Thursday. Over open water waves 0.5 metres or less building to 0.5 to 1 near noon then subsiding to 0.5 or less Thursday morning.

Extended Forecast

Issued 03:00 AM EDT 12 March 2025
Friday Wind southeast 15 knots increasing to southeast 20 late in the day.
Saturday Wind southeast 20 knots increasing to south 30 late in the day.
Sunday Wind south 25 knots becoming northwest 25.

Ice Forecast*

Issued 12:00 PM EDT 11 March 2025 Today Tonight and Wednesday Open water except 9 plus tenths medium lake ice along the shore in the eastern section. Consolidated thick lake ice along parts of the shores.

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

 

[ Canadian Ice Service ]

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas 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 Great Duck Island Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Cove Island Goderich Sarnia Chris Hadfield Airport Tobermory Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal Vineland Station Welland-Pelham Windsor Airport Port Colborne Erieau Point Pelee Burlington Lift Bridge Cobourg Hamilton Munro Int'l Airport Oshawa Executive Airport Point Petre Toronto City Centre Airport CFB Trenton Peterborough Municipal Airport
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land station Land Station
Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 11 March 2025 Today Tonight and Wednesday

Ice Coverage

Open water except 9 plus tenths medium lake ice along the shore in
the eastern section. Consolidated thick lake ice along parts of the
shores.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 12 March 2025 Today Tonight and Thursday At 3:00 a.m. EDT today high 1020 mb located over northeastern
Ontario.
By 3:00 a.m. EDT Thursday high 1024 mb located over New Brunswick.

By 3:00 a.m. EDT Thursday approaching trough located on a line
east-west over northwestern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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