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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EST 06 March 2026

Today Tonight and Saturday.

Wind east 20 knots diminishing to east 15 near noon and to variable 10 this evening. Wind increasing to southwest 20 late overnight and to southwest 25 near noon Saturday.

Periods of drizzle this morning. Periods of rain and fog patches tonight and Saturday with a risk of thunderstorms.

Waves

Issued 10:30 AM EST 06 March 2026
Today Tonight and Saturday. Waves 1.5 metres subsiding to 1 this afternoon and to 0.5 or less near midnight. Waves building to 1 early Saturday morning and to 1.5 Saturday afternoon.

Extended Forecast

Issued 03:00 AM EST 06 March 2026
Sunday Wind west 25 knots.
Monday Wind southwest 20 knots.
Tuesday Wind west 15 knots diminishing to light.

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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 16 May 2025 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EST 6 March 2026 Today Tonight and Saturday At 10:30 a.m. EST today departing ridge located on a line
northwest-southeast over central Quebec.

At 10:30 a.m. EST today trough located from Kansas to Lake of
the Woods.
By 10:30 a.m. EST Saturday trough located on a line
northeast-southwest over northeastern Ontario.

By 10:30 a.m. EST Saturday ridge located on a line north-south
over northwestern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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