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Southern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 23 March 2025

Today Tonight and Monday.

Wind light increasing to southeast 15 knots near noon and to southeast 20 early this evening. Wind increasing to southeast 25 near midnight then veering to southwest 15 to 20 Monday morning. Wind increasing to southwest 25 Monday afternoon then veering to west 25 Monday evening.

Snow or rain beginning near midnight changing to scattered flurries or scattered showers Monday evening. Visibility 1 mile or less in snow.

Waves

Issued 03:00 AM EDT 23 March 2025
Today Tonight and Monday. Over open water waves 0.5 metres or less building to 0.5 to 1 this afternoon and to 1 to 1.5 this evening.

Extended Forecast

Issued 03:00 AM EDT 23 March 2025
Tuesday Wind northwest 15 knots.
Wednesday Wind northwest 15 knots.
Thursday Wind west 15 knots backing to southwest 20.

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
Legend:
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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 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 3:00 AM EDT 23 March 2025 Today Tonight and Monday At 3:00 a.m. EDT today ridge located on a line north-south over
Lake Huron.
By 3:00 a.m. EDT Monday ridge located on a line northeast-southwest
over Quebec.

At 3:00 a.m. EDT today low 1000 mb located over South Dakota.
By 3:00 a.m. EDT Monday low 998 mb located over northern Lake
Michigan.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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