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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 14 June 2026

Tonight and Monday.

Strong wind warning in effect.

Wind variable 10 knots increasing to northwest 15 this evening and to northwest 20 late overnight. Wind diminishing to west 15 Monday morning then backing to southwest 15 Monday afternoon.

Showers this evening.

Waves

Issued 06:30 PM EDT 14 June 2026
Tonight and Monday. Waves 0.5 metres or less building to 0.5 to 1 this evening.

Extended Forecast

Issued 06:30 PM EDT 14 June 2026
Tuesday Wind southwest 15 knots.
Wednesday Wind light becoming southwest 15 knots.
Thursday Wind south 25 knots veering to southwest 30.

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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
Legend:
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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

Western Lake Ontario

Issued 6:30 PM EDT 14 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 14 June 2026 Tonight and Monday At 6:30 p.m. EDT tonight trough located on a line north-south over
eastern Lake Ontario.
By 6:30 p.m. EDT Monday trough located on a line northeast-southwest
over the Eastern Seaboard.

At 6:30 p.m. EDT tonight trough located on a line
northeast-southwest over northern Manitoba.
By 6:30 p.m. EDT Monday trough located on a line northeast-southwest
over Lake Nipigon.

At 6:30 p.m. EDT tonight ridge located on a line northwest-southeast
over Nebraska.
By 6:30 p.m. EDT Monday ridge located on a line east-west over
Missouri.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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