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Southern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 06 December 2025

Today Tonight and Sunday.

Wind southwest 25 knots veering to west 25 this morning then to northwest 20 this afternoon. Wind diminishing to northwest 15 this evening and to variable 10 overnight. Wind increasing to southeast 15 Sunday morning and to northwest 20 Sunday afternoon. Wind increasing to northwest 25 Sunday evening.

Flurries ending this evening. Flurries overnight and Sunday. Visibility 1 mile or less in flurries.

Waves

Issued 03:00 AM EST 06 December 2025
Today Tonight and Sunday. Waves 1 to 1.5 metres.

Extended Forecast

Issued 03:00 AM EST 06 December 2025
Monday Wind north 15 knots diminishing to light in the morning then increasing to southwest 25 late in the day.
Tuesday Wind southwest 30 knots.
Wednesday Wind northeast 25 knots.

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

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

Ice Forecasts

Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EST 6 December 2025 Today Tonight and Sunday At 3:00 a.m. EST today departing ridge located on a line north-south
over eastern Quebec.

At 3:00 a.m. EST today departing cold front located on a line
north-south over Sudbury.

At 3:00 a.m. EST today ridge located on a line northwest-southeast
over Saskatchewan.
By 3:00 a.m. EST Sunday ridge located on a line north-south over
Manitoba.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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