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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 08 March 2026

Today Tonight and Monday.

Wind southwest 20 knots increasing to southwest 25 to 30 near noon then diminishing to south 15 early this evening. Wind increasing to southwest 25 to 30 near midnight then diminishing to southwest 20 Monday afternoon. Wind diminishing to variable 10 Monday evening.

Scattered showers or scattered flurries this afternoon.

Waves

Issued 10:30 AM EDT 08 March 2026
Today Tonight and Monday. Mainly ice covered.

Extended Forecast

Issued 03:00 AM EDT 08 March 2026
Tuesday Wind variable 15 knots increasing to northeast 15 to 20 in the afternoon then becoming northeast 20 late in the day.
Wednesday Wind northeast 20 knots becoming variable 20 late in the day.
Thursday Wind northwest 25 knots diminishing to northwest 15 late in the day.

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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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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 10:30 AM EDT 8 March 2026 Today Tonight and Monday At 10:30 a.m. EDT today ridge located on a line northeast-southwest
over Lake Ontario.
By 10:30 a.m. EDT Monday weakening ridge located on a line
northeast-southwest over Kentucky.

At 10:30 a.m. EDT today low 979 mb located over northern Ontario.
By 10:30 a.m. EDT Monday departing low 981 mb located east of
Hudson Bay.

At 10:30 a.m. EDT today low 989 mb located over western
Saskatchewan.
By 10:30 a.m. EDT Monday low 989 mb located south of James Bay.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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