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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 18 April 2026

Today Tonight and Sunday.

Wind southeast 25 knots becoming west 25 near noon then veering to northwest 20 this evening. Wind backing to west 15 late overnight then veering to northwest 20 near noon Sunday.

Showers ending near midnight. Scattered flurries Sunday morning.

Waves

Issued 10:30 AM EDT 18 April 2026
Today Tonight and Sunday. Waves 2 metres subsiding to 1 to 1.5 near midnight and to 0.5 to 1 early Sunday morning. Waves building to 1 to 1.5 Sunday afternoon.

Extended Forecast

Issued 03:00 AM EDT 18 April 2026
Monday Wind northwest 20 knots backing to southwest 15 late in the day.
Tuesday Wind south 20 knots.
Wednesday Wind northwest 15 knots diminishing to light.

Ice Forecast*

Issued 12:00 PM EDT 18 April 2026 Today Tonight and Sunday Open water except 2 tenths thick lake ice along 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 18 April 2026 Today Tonight and Sunday

Ice Coverage

Open water except 2 tenths thick lake ice along 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 10:30 AM EDT 18 April 2026 Today Tonight and Sunday At 10:30 a.m. EDT today low 986 mb located over James Bay.
By 10:30 a.m. EDT Sunday low 980 mb located over eastern Hudson Bay.

At 10:30 a.m. EDT today cold front located on a line north-south
over western Lake Huron.
By 10:30 a.m. EDT Sunday departing cold front located on a line
northeast-southwest over eastern Quebec.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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