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Northern Georgian Bay

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Forecast

Marine Forecast

Issued 06:30 PM EST 10 December 2025

Tonight and Thursday.

Wind north 20 knots backing to northwest 20 this evening then becoming northwest 15 to 20 near noon Thursday.

Scattered flurries.

Risk of freezing spray tonight.

Waves

Issued 06:30 PM EST 10 December 2025
Tonight and Thursday. Waves 1.5 to 2 metres subsiding to 1 to 1.5 late overnight and to 1 Thursday afternoon.

Extended Forecast

Issued 06:30 PM EST 10 December 2025
Friday Wind northwest 15 knots backing to southwest 15 late in the day.
Saturday Wind southwest 25 knots veering to northwest 20 late in the day.
Sunday Wind north 20 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 6:30 PM EST 10 December 2025 Tonight and Thursday At 6:30 p.m. EST tonight low 990 mb located over eastern Lake
Ontario.
By 6:30 p.m. EST Thursday low 984 mb located over southeastern
Quebec.

At 6:30 p.m. EST tonight ridge located on a line north-south
over Manitoba.
By 6:30 p.m. EST Thursday ridge located on a line north-south over
northwestern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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