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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 17 June 2026

Tonight and Thursday.

Strong wind warning in effect.

Wind south 10 knots increasing to southeast 15 this evening then backing to northeast 15 late overnight. Wind backing to northwest 15 Thursday morning then increasing to west 20 near noon Thursday.

Rain beginning this evening changing to scattered showers Thursday morning. Risk of thunderstorms tonight and Thursday morning. Fog patches dissipating Thursday evening.

Waves

Issued 06:30 PM EDT 17 June 2026
Tonight and Thursday. Waves 0.5 metres or less building to 0.5 to 1 near midnight and to 1 to 1.5 Thursday afternoon.

Extended Forecast

Issued 06:30 PM EDT 17 June 2026
Friday Wind west 20 knots.
Saturday Wind northwest 15 knots diminishing to light.
Sunday Wind light becoming west 15 knots.

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

Northern Georgian Bay

Issued 6:30 PM EDT 17 June 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 6:30 PM EDT 17 June 2026 Tonight and Thursday At 6:30 p.m. EDT tonight low 990 mb located over southern Minnesota.
By 6:30 p.m. EDT Thursday low 991 mb located over southern Quebec.

By 6:30 p.m. EDT Thursday trough located on a line north-south
over western Lake Superior.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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