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Southern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 11 April 2026

Tonight and Sunday.

Wind light becoming southeast 10 knots this evening then increasing to southeast 15 early Sunday morning. Wind increasing to southeast 20 near noon Sunday then veering to southwest 20 Sunday evening.

Periods of rain or snow Sunday. Risk of thunderstorms Sunday late in the day. Fog patches forming Sunday evening.

Waves

Issued 06:30 PM EDT 11 April 2026
Tonight and Sunday. Waves 0.5 metres or less building to 0.5 to 1 Sunday morning and to 1 to 1.5 Sunday afternoon.

Extended Forecast

Issued 06:30 PM EDT 11 April 2026
Monday Wind southwest 25 knots diminishing to southwest 15 in the afternoon.
Tuesday Wind east 15 knots becoming variable 15 late in the day.
Wednesday Wind southeast 15 knots veering to southwest 20 late in the day.

Ice Forecast*

Issued 12:00 PM EDT 11 April 2026 Today Tonight and Sunday Open water except 5 tenths thick lake ice along the northeastern shore. Consolidated rotten thick lake ice along parts of the 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 11 April 2026 Today Tonight and Sunday

Ice Coverage

Open water except 5 tenths thick lake ice along the northeastern
shore. Consolidated rotten thick lake ice along parts of the shore.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 11 April 2026 Tonight and Sunday At 6:30 p.m. EDT tonight ridge located on a line north-south over
Georgian Bay.
By 6:30 p.m. EDT Sunday ridge located on a line northeast-southwest
over New England.

At 6:30 p.m. EDT tonight low located over eastern Montana.
By 6:30 p.m. EDT Sunday low located over southeastern Manitoba.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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