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Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 22 July 2026

Today Tonight and Thursday.

Strong wind warning in effect.

Wind northwest 25 knots diminishing to northwest 15 early this evening then backing to west 15 Thursday morning. Wind backing to southwest 15 Thursday evening.

Waves

Issued 10:30 AM EDT 22 July 2026
Today Tonight and Thursday. Waves 1.5 to 2 metres subsiding to 1 this afternoon.

Extended Forecast

Issued 03:00 AM EDT 22 July 2026
Friday Wind southwest 10 to 15 knots becoming light in the afternoon.
Saturday Wind light becoming south 15 knots.
Sunday Wind light.

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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 17 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Georgian Bay

Issued 10:30 AM EDT 22 July 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 22 July 2026 Today Tonight and Thursday At 10:30 a.m. EDT today departing trough from 996 mb low located
on a line north-south over Montréal.

At 10:30 a.m. EDT today ridge located on a line northwest-southeast
over Minnesota.
By 10:30 a.m. EDT Thursday ridge located on a line east-west over
southwestern Ontario.

By 10:30 a.m. EDT Thursday low 1006 mb located near Hudson Bay.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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