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Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 16 July 2026

Today Tonight and Friday.

Wind west 10 knots veering to north 10 early this evening then increasing to northeast 15 near midnight. Wind diminishing to southeast 10 Friday morning then becoming light Friday afternoon.

Smoke dissipating early this evening. Visibility as low as 1 mile in smoke.

Waves

Issued 10:30 AM EDT 16 July 2026
Today Tonight and Friday. Waves 0.5 metres or less building to 0.5 to 1 late overnight then subsiding to 0.5 or less near noon Friday.

Extended Forecast

Issued 03:00 AM EDT 16 July 2026
Saturday Wind southeast 15 knots veering to southwest 15 in the morning then to northwest 15 in the afternoon.
Sunday Wind north 20 knots diminishing to light.
Monday Wind light becoming southwest 15 knots.

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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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 16 July 2026 Today Tonight and Friday At 10:30 a.m. EDT today departing low 988 mb located over Labrador.

At 10:30 a.m. EDT today ridge located on a line northwest-southeast
over northwestern Ontario.
By 10:30 a.m. EDT Friday ridge located on a line north-south over
central Ontario.

At 10:30 a.m. EDT today low 1011 mb located over North Dakota.
By 10:30 a.m. EDT Friday low 1010 mb located over northwestern
Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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