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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 10 June 2026

Today Tonight and Thursday.

Wind southwest 10 knots increasing to southwest 15 this afternoon then diminishing to southwest 10 this evening. Wind increasing to southwest 15 Thursday morning then diminishing to southwest 10 Thursday evening.

Scattered showers ending this afternoon with a risk of thunderstorms. Scattered showers overnight and Thursday morning with a risk of thunderstorms. Fog patches.

Waves

Issued 10:30 AM EDT 10 June 2026
Today Tonight and Thursday. Waves 0.5 metres or less building to 0.5 to 1 this afternoon then subsiding to 0.5 or less near midnight. Waves building to 0.5 to 1 near noon Thursday then subsiding to 0.5 or less Thursday evening.

Extended Forecast

Issued 03:00 AM EDT 10 June 2026
Friday Wind light becoming west 15 knots in the afternoon.
Saturday Wind west 15 knots.
Sunday Wind southwest 15 knots veering to northwest 15.

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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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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 17 May 2026 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 10 June 2026 Today Tonight and Thursday At 10:30 a.m. EDT today departing low 1006 mb located over
northeastern Ontario.

At 10:30 a.m. EDT today low 994 mb located over northern Lake
Winnipeg.
By 10:30 a.m. EDT Thursday departing low 982 mb located over
northeastern Manitoba.

By 10:30 a.m. EDT Thursday approaching ridge located on a line
northwest-southeast over Wyoming.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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