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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 05 March 2026

Today Tonight and Friday.

Wind northeast 15 knots increasing to northeast 20 this morning then veering to east 15 Friday morning.

Periods of rain beginning this afternoon changing to periods of drizzle near midnight and ending near noon Friday. Scattered showers Friday evening. Fog patches forming Friday evening.

Waves

Issued 03:00 AM EST 05 March 2026
Today Tonight and Friday. Waves 0.5 metres or less building to 1 early this morning and to 1.5 near noon. Waves subsiding to 1 Friday morning.

Extended Forecast

Issued 03:00 AM EST 05 March 2026
Saturday Wind south 20 knots.
Sunday Wind west 25 knots.
Monday Wind southwest 20 knots.

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Map of Great Lakes - Lake Huron marine weather areas Wiarton Airport Western Islands Cove Island Goderich Lake Simcoe Regional Airport Vineland Station Parry Sound Harbour Sarnia Chris Hadfield Airport Tobermory Muskoka Airport Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Lagoon City Southeast Shoal Burlington Lift Bridge Welland-Pelham Windsor Airport Port Colborne Erieau Peterborough Municipal Airport CFB Trenton Toronto City Centre Airport Point Petre Oshawa Executive Airport Hamilton Munro Int'l Airport Point Pelee Cobourg Port Colborne - 45142 North Channel - 45154 Ajax - 45159 Lake Nipissing - 45152 Sault Ste. Marie Airport Killarney Lake Simcoe - 45151 Greater Sudbury Airport South Lake Huron - 45149 Lake St Clair - 45147 North Bay Airport South Georgian Bay - 45143 Gore Bay-Manitoulin Airport Grimsby - 45139 Georgian Bay - 45137 Great Duck Island Collingwood Kingston Airport Grenadier Island Brockville Prince Edward Point - 45135 Port Stanley - 45132
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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 5 March 2026 Today Tonight and Friday At 3:00 a.m. EST today ridge located on a line northwest-southeast
over northern Ontario.
By 3:00 a.m. EST Friday departing ridge located on a line east-west
over central Quebec.

At 3:00 a.m. EST today low 1014 mb located over Missouri.
By 3:00 a.m. EST Friday low 1015 mb located over Pennsylvania.

At 3:00 a.m. EST Friday approaching trough located from Nebraska
to Lake of the Woods.

Great Lakes - Lake Huron Area

Another Region

Marine Weather for Canada

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