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Southern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 21 January 2026

Today Tonight and Thursday.

Wind southwest 25 knots backing to south 20 near noon then veering to west 20 this evening. Wind west 25 Thursday.

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

Freezing spray warning in effect.

Freezing spray ending late this afternoon. Risk of freezing spray Thursday morning. Freezing spray beginning near noon Thursday.

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 this afternoon 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 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 16 May 2025 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Freezing spray warning in effect

Southern 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 Erie and Lake Ontario Area

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Marine Weather for Canada

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