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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 21 January 2026

Today Tonight and Thursday.

Wind southwest 25 knots diminishing to west 15 this evening then increasing to west 25 overnight. Wind west 25 Thursday.

Flurries changing to snow early this morning then to flurries near midnight. Visibility 1 mile or less in precipitation.

Freezing spray warning in effect.

Freezing spray ending this evening. Freezing spray beginning Thursday morning.

Waves

Issued 03:00 AM EST 21 January 2026
Today Tonight and Thursday. Over open water waves 2 metres subsiding to 1 to 1.5 early this evening then building to 2 Thursday morning.

Extended Forecast

Issued 03:00 AM EST 21 January 2026
Friday Wind north 20 knots.
Saturday Wind north 15 knots diminishing to light.
Sunday Wind southeast 15 knots backing to east 20.

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Map of Great Lakes - Lake Huron marine weather areas Cove Island Goderich Oshawa Executive Airport CFB Trenton Western Islands Wiarton Airport Point Petre Lake Simcoe Regional Airport Parry Sound Harbour Toronto City Centre Airport Muskoka Airport Lagoon City Brockville Hamilton Munro Int'l Airport Sarnia Chris Hadfield Airport Tobermory Cobourg Harrow AAFC Long Point Port Weller Burlington Lift Bridge St. Catharines / Niagara District Airport Southeast Shoal Point Pelee Vineland Station Welland-Pelham Erieau Windsor Airport Port Colborne Killarney South Georgian Bay - 45143 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Lake St Clair - 45147 South Lake Huron - 45149 Sault Ste. Marie Airport Lake Simcoe - 45151 Collingwood Greater Sudbury Airport North Bay Airport Kingston Airport Peterborough Municipal Airport Grenadier Island Port Colborne - 45142 Great Duck Island Ajax - 45159 Gore Bay-Manitoulin Airport North Channel - 45154 Lake Nipissing - 45152
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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

Warnings (In effect)

Freezing spray warning in effect

Northern Georgian Bay

Issued 03:00 AM EST 21 January 2026

Moderate or severe freezing spray is 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 3:00 AM EST 21 January 2026 Today Tonight and Thursday At 3:00 a.m. EST today departing ridge located on a line
northeast-southwest over the Eastern Seaboard.

At 3:00 a.m. EST today low 1004 mb located over northern Manitoba.
By 3:00 a.m. EST Thursday low 1003 mb located over northeastern
Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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