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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 07 March 2026

Today Tonight and Sunday.

Wind southwest 15 knots increasing to southwest 30 this morning then veering to west 25 this afternoon. Wind diminishing to northwest 15 this evening then backing to west 15 overnight. Wind backing to southwest 20 Sunday morning then increasing to southwest 30 Sunday afternoon.

Periods of rain ending this evening with a risk of thunderstorms. Scattered showers Sunday late in the day. Fog patches dissipating this afternoon.

Waves

Issued 03:00 AM EST 07 March 2026
Today Tonight and Sunday. Mainly ice covered.

Extended Forecast

Issued 03:00 AM EST 07 March 2026
Monday Wind west 20 knots backing to southwest 25 in the morning then diminishing to southwest 15 late in the day.
Tuesday Wind light becoming northeast 15 knots.
Wednesday Wind northeast 15 knots increasing to north 25 late in the day.

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Map of Great Lakes - Lake Huron marine weather areas Wiarton Airport Western Islands Cove Island Goderich Lake Simcoe Regional Airport Vineland Station Parry Sound Harbour Sarnia Chris Hadfield Airport Tobermory Muskoka Airport Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Lagoon City Southeast Shoal Burlington Lift Bridge Welland-Pelham Windsor Airport Port Colborne Erieau Peterborough Municipal Airport CFB Trenton Toronto City Centre Airport Point Petre Oshawa Executive Airport Hamilton Munro Int'l Airport Point Pelee Cobourg Port Colborne - 45142 North Channel - 45154 Ajax - 45159 Lake Nipissing - 45152 Sault Ste. Marie Airport Killarney Lake Simcoe - 45151 Greater Sudbury Airport South Lake Huron - 45149 Lake St Clair - 45147 North Bay Airport South Georgian Bay - 45143 Gore Bay-Manitoulin Airport Grimsby - 45139 Georgian Bay - 45137 Great Duck Island Collingwood Kingston Airport Grenadier Island Brockville Prince Edward Point - 45135 Port Stanley - 45132
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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 7 March 2026 Today Tonight and Sunday At 3:00 a.m. EST today trough located from Whitefish Bay to Iowa.
By 3:00 a.m. EDT Sunday trough located on a line northeast-southwest
over the St. Lawrence River.

At 3:00 a.m. EST today ridge located on a line northeast-southwest
over northwestern Ontario.
By 3:30 a.m. EDT Sunday ridge located on a line northeast-southwest
over northeastern Ontario.

By 3:00 a.m. EDT Sunday trough located on a line north-south over
western Lake Superior.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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