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Southern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 14 September 2026

Today Tonight and Tuesday.

Strong wind warning in effect.

Wind north 15 knots diminishing to northwest 10 near noon then becoming light this afternoon. Wind increasing to south 15 this evening and to south 20 late overnight. Wind veering to southwest 25 Tuesday afternoon then diminishing to west 15 Tuesday evening.

Showers Tuesday.

Waves

Issued 10:30 AM EDT 14 September 2026
Today Tonight and Tuesday. Waves 0.5 to 1 metre subsiding to 0.5 or less this afternoon then building to 0.5 to 1 near midnight. Waves building to 1 to 1.5 early Tuesday morning.

Extended Forecast

Issued 03:00 AM EDT 14 September 2026
Wednesday Wind northwest 15 knots diminishing to light in the morning.
Thursday Wind light becoming northwest 15 knots late in the day.
Friday Wind north 15 knots diminishing to light.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Hamilton Munro Int'l Airport CFB Trenton Erieau Toronto City Centre Airport Point Pelee Peterborough Municipal Airport Burlington Lift Bridge Point Petre Cobourg Oshawa Executive Airport South Lake Huron - 45149 Port Colborne Brockville 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 Windsor Airport Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Welland-Pelham Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Sarnia Chris Hadfield Airport Vineland Station Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Tobermory
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Southern Georgian Bay

Issued 10:30 AM EDT 14 September 2026

'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.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 14 September 2026 Today Tonight and Tuesday At 10:30 a.m. EDT today high 1027 mb located over Lower Michigan.
By 10:30 a.m. EDT Tuesday high 1030 mb located off New England.

By 10:30 a.m. EDT Tuesday approaching low 995 mb located over
northern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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