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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 07 November 2025

Today Tonight and Saturday.

Strong wind warning in effect.

Wind variable 10 knots increasing to south 20 early this morning then veering to southwest 20 near noon. Wind veering to west 20 near midnight then diminishing to northwest 10 Saturday morning. Wind becoming light Saturday afternoon then becoming northeast 10 Saturday evening.

Showers this afternoon and this evening.

Waves

Issued 03:00 AM EST 07 November 2025
Today Tonight and Saturday. Waves less than 0.5 metres building to 0.5 to 1 this morning and to 1.5 this afternoon. Waves subsiding to 0.5 or less near noon Saturday.

Extended Forecast

Issued 03:00 AM EST 07 November 2025
Sunday Wind northeast 15 knots increasing to northeast 25 in the afternoon.
Monday Wind north 20 knots.
Tuesday Wind northwest 15 knots increasing to west 25.

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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
Legend:
buoy Buoy
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

Warnings (In effect)

Strong wind warning in effect

Western Lake Ontario

Issued 03:00 AM EST 07 November 2025

'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 or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EST 7 November 2025 Today Tonight and Saturday At 3:00 a.m. EST today ridge located on a line north-south over
eastern New York State.
By 3:00 a.m. EST Saturday departing ridge located on a line
northwest-southeast over the Gulf of St. Lawrence.

At 3:00 a.m. EST today low 997 mb located near Duluth.
By 3:00 a.m. EST Saturday low 992 mb located over southern Quebec.

By 3:00 a.m. EST Saturday ridge located on a line
northwest-southeast over Manitoba.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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