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Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 16 August 2026

Today Tonight and Monday.

Strong wind warning in effect.

Wind southeast 20 knots diminishing to southeast 15 near noon and to light early this evening. Wind becoming northwest 15 near midnight then veering to north 15 Monday morning. Wind diminishing to northwest 10 near noon Monday.

Showers this afternoon tonight and Monday morning. Risk of thunderstorms this afternoon and this evening.

Waves

Issued 03:00 AM EDT 16 August 2026
Today Tonight and Monday. Waves 1 to 1.5 metres subsiding to 0.5 to 1 this afternoon and to 0.5 or less this evening. Waves building to 0.5 to 1 overnight then subsiding to 0.5 or less Monday afternoon.

Extended Forecast

Issued 03:00 AM EDT 16 August 2026
Tuesday Wind light becoming southwest 15 knots in the afternoon.
Wednesday Wind northwest 15 knots.
Thursday Wind light becoming west 15 knots late in the day.

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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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land station Land Station
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

Georgian Bay

Issued 03:00 AM EDT 16 August 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 3:00 AM EDT 16 August 2026 Today Tonight and Monday At 3:00 a.m. EDT today departing ridge located on a line north-south
over New Hampshire.

At 3:00 a.m. EDT today trough located on a line north-south over
western Lake Superior.
By 3:00 a.m. EDT Monday trough located on a line northwest-southeast
over western Quebec.

By 3:00 a.m. EDT Monday approaching ridge located on a line
northeast-southwest over northwestern Ontario.

By 3:00 a.m. EDT Monday trough located on a line northeast-southwest
over southern Manitoba.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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