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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 28 April 2025

Today Tonight and Tuesday.

Wind south 10 knots backing to southeast 10 near noon then increasing to southeast 15 early this evening. Wind veering to south 20 late this evening then to southwest 25 overnight. Wind veering to west 25 Tuesday afternoon then to northwest 20 Tuesday evening.

Showers tonight and Tuesday. Risk of thunderstorms Tuesday. Fog patches forming Tuesday morning.

Waves

Issued 03:00 AM EDT 28 April 2025
Today Tonight and Tuesday. Waves 0.5 metres or less building to 0.5 to 1 this evening and to 1 to 1.5 near midnight. Waves building to 2 Tuesday morning.

Extended Forecast

Issued 03:00 AM EDT 28 April 2025
Wednesday Wind north 20 knots diminishing to light in the morning.
Thursday Wind light becoming east 15 knots late in the day.
Friday Wind northeast 15 knots backing to northwest 20.

Ice Forecast*

Issued 12:00 PM EDT 27 April 2025 Today Tonight and Monday Open water except 1 tenth thick lake ice along parts of the northern shore.

*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
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 27 April 2025 Today Tonight and Monday

Ice Coverage

Open water except 1 tenth thick lake ice along parts of the northern
shore.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 28 April 2025 Today Tonight and Tuesday At 3:00 a.m. EDT today ridge located on a line north-south over
southern Ontario.
By 3:00 a.m. EDT Tuesday ridge located on a line northeast-southwest
over the Eastern Seaboard.

At 3:00 a.m. EDT today trough located on a line northeast-southwest
over northern Ontario.
By 3:00 a.m. EDT Tuesday departing trough located on a line
northeast-southwest over northern Quebec.

At 3:00 a.m. EDT today low 999 mb located over Nebraska.
By 3:00 a.m. EDT Tuesday approaching high 998 mb located near
Lake Superior.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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