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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 16 December 2025

Today Tonight and Wednesday.

Wind west 15 knots backing to southwest 15 early this morning then increasing to southwest 20 this afternoon. Wind increasing to southwest 30 this evening then diminishing to southwest 20 near noon Wednesday. Wind veering to west 15 Wednesday evening.

Waves

Issued 03:00 AM EST 16 December 2025
Today Tonight and Wednesday. Waves 0.5 to 1 metre building to 1 to 1.5 early this evening and to 2 to 3 near midnight. Waves subsiding to 1 to 1.5 Wednesday afternoon and to 0.5 to 1 Wednesday evening.

Extended Forecast

Issued 03:00 AM EST 16 December 2025
Thursday Wind south 20 knots increasing to south 30 in the afternoon.
Friday Wind southwest 35 knots diminishing to northwest 20 late in the day.
Saturday Wind west 20 knots.

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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
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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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EST 16 December 2025 Today Tonight and Wednesday At 3:00 a.m. EST today ridge located on a line northeast-southwest
over North Carolina.
By 3:00 a.m. EST Wednesday ridge located on a line
northeast-southwest over the Eastern Seaboard.

At 3:00 a.m. EST today low 987 mb located over eastern Saskatchewan.
By 3:00 a.m. EST Wednesday trough from low located on a line
northeast-southwest over Lake Superior.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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