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Southern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 21 May 2025

Today Tonight and Thursday.

Wind northeast 10 knots increasing to east 15 early this evening then backing to northeast 15 Thursday morning. Wind backing to north 15 Thursday evening.

Periods of rain and fog banks tonight and Thursday.

Waves

Issued 10:30 AM EDT 21 May 2025
Today Tonight and Thursday. Waves 0.5 to 1 metre subsiding to 0.5 or less near noon then building to 0.5 to 1 this evening.

Extended Forecast

Issued 03:00 AM EDT 21 May 2025
Friday Wind light becoming northwest 15 knots in the afternoon.
Saturday Wind northwest 15 knots diminishing to light.
Sunday Wind light.

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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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 21 May 2025 Today Tonight and Thursday At 10:30 a.m. EDT today ridge located on a line north-south over
northern Ontario.
By 10:30 a.m. EDT Thursday ridge located on a line north-south
over northwestern Ontario.

At 10:30 a.m. EDT today low 1002 mb located over Ohio.
By 10:30 a.m. EDT Thursday low 1001 mb located over southwestern
Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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