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Southern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 22 March 2025

Today Tonight and Sunday.

Wind north 30 knots backing to northwest 25 near noon then diminishing to northwest 15 early this evening. Wind diminishing to north 10 late this evening then becoming light late overnight. Wind increasing to southeast 15 near noon Sunday and to southeast 20 Sunday evening.

Scattered flurries this morning.

Risk of freezing spray today.

Waves

Issued 10:30 AM EDT 22 March 2025
Today Tonight and Sunday. Over open water waves 2 metres subsiding to 1 to 1.5 this afternoon and to 0.5 or less this evening. Waves building to 0.5 to 1 Sunday afternoon.

Extended Forecast

Issued 06:30 PM EDT 22 March 2025
Monday Wind southeast 25 knots veering to southwest 20 in the morning.
Tuesday Wind northwest 15 knots.
Wednesday Wind northwest 15 knots.

Ice Forecast*

Issued 12:00 PM EDT 22 March 2025 Today Tonight and Sunday Open water except 5 tenths medium lake ice including 1 tenth thick lake ice in the northeastern section. Consolidated thick lake ice along the northeastern 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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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 22 March 2025 Today Tonight and Sunday

Ice Coverage

Open water except 5 tenths medium lake ice including 1 tenth thick
lake ice in the northeastern section. Consolidated thick lake ice
along the northeastern shores.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 22 March 2025 Tonight and Sunday At 6:30 p.m. EDT tonight departing cold front located on a line
northeast-southwest over New York State.

At 6:30 p.m. EDT tonight ridge located on a line north-south over
eastern Lake Superior.
By 6:30 p.m. EDT Sunday ridge located on a line north-south
over Quebec.

At 6:30 p.m. EDT tonight low 997 mb located over South Dakota.
By 6:30 p.m. EDT Sunday low 998 mb located over Wisconsin.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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