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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 22 April 2026

Today Tonight and Thursday.

Wind light becoming northeast 10 knots near midnight then veering to east 10 Thursday morning. Wind increasing to east 15 Thursday evening.

Waves

Issued 03:00 AM EDT 22 April 2026
Today Tonight and Thursday. Waves 0.5 metres or less.

Extended Forecast

Issued 03:00 AM EDT 22 April 2026
Friday Wind east 20 knots.
Saturday Wind southeast 20 knots diminishing to light late in the day.
Sunday Wind light.

Ice Forecast*

Issued 12:00 PM EDT 21 April 2026 Today Tonight and Wednesday Open water except 2 tenths thick lake ice along parts of the northeastern shore. Consolidated rotten thick lake ice along parts of the northeastern shore.

*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 CFB Trenton Port Colborne - 45142 Hamilton Munro Int'l Airport Oshawa Executive Airport Port Stanley - 45132 Lake Nipissing - 45152 Point Petre Georgian Bay - 45137 Toronto City Centre Airport Lake Simcoe - 45151 South Georgian Bay - 45143 Prince Edward Point - 45135 Peterborough Municipal Airport South Lake Huron - 45149 Collingwood Lake St Clair - 45147 Grimsby - 45139 Goderich Lagoon City Kingston Airport Muskoka Airport Parry Sound Harbour Grenadier Island Lake Simcoe Regional Airport Wiarton Airport Brockville Western Islands Cove Island Great Duck Island North Channel - 45154 Sarnia Chris Hadfield Airport Gore Bay-Manitoulin Airport Tobermory Harrow AAFC Long Point North Bay Airport Port Weller St. Catharines / Niagara District Airport Greater Sudbury Airport Southeast Shoal Vineland Station Port Colborne Erieau Cobourg Sault Ste. Marie Airport Windsor Airport Welland-Pelham Killarney Ajax - 45159 Point Pelee Burlington Lift Bridge
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 21 April 2026 Today Tonight and Wednesday

Ice Coverage

Open water except 2 tenths thick lake ice along parts of the
northeastern shore. Consolidated rotten thick lake ice along parts
of the northeastern shore.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 22 April 2026 Today Tonight and Thursday At 3:00 a.m. EDT today dissipating trough located on a line
east-west over southwestern Ontario.

At 3:00 a.m. EDT today ridge located on a line north-south over
Lake Superior.
By 3:00 a.m. EDT Thursday ridge located on a line north-south over
northeastern Ontario.

By 3:00 a.m. EDT Thursday approaching cold front located from
North Dakota to Kansas.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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