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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 04 May 2025

Tonight and Monday.

Strong wind warning in effect.

Wind northeast 15 knots increasing to northeast 20 this evening then diminishing to northeast 15 early Monday morning. Wind diminishing to northeast 10 near noon Monday.

Scattered showers Monday evening.

Waves

Issued 06:30 PM EDT 04 May 2025
Tonight and Monday. Waves 0.5 to 1 metre subsiding to 0.5 or less Monday afternoon.

Extended Forecast

Issued 06:30 PM EDT 04 May 2025
Tuesday Wind northeast 15 knots diminishing to light in the morning.
Wednesday Wind northwest 15 knots.
Thursday Wind north 15 knots diminishing to light late in the day.

Ice Forecast*

Issued 12:00 PM EDT 4 May 2025 Today Tonight and Monday Open water.

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

 

[ Canadian Ice Service ]

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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
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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 4 May 2025 Today Tonight and Monday

Ice Coverage

Open water.

Warnings

Warnings (In effect)

Strong wind warning in effect

Georgian Bay

Issued 6:30 PM EDT 04 May 2025

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 4 May 2025 Tonight and Monday At 6:30 p.m. EDT tonight ridge from 1026 mb high located on a line
northeast-southwest over Lake Superior.
By 6:30 p.m. EDT Monday ridge from 1034 mb high located on a line
east-west over northeastern Ontario.

At 6:30 p.m. EDT tonight low 1009 mb located over southern Ohio.
By 6:30 p.m. EDT Monday low 1012 mb located over western
Pennsylvania.

At 6:30 p.m. EDT tonight trough located on a line
northeast-southwest over Manitoba.
By 6:30 p.m. EDT Monday trough located on a line northeast-southwest
over northwestern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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