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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 09 June 2026

Today Tonight and Wednesday.

Wind light becoming south 10 knots overnight then veering to southwest 10 near noon Wednesday.

Scattered showers this afternoon tonight and Wednesday with a risk of thunderstorms. Fog patches forming near noon and dissipating Wednesday afternoon.

Waves

Issued 03:00 AM EDT 09 June 2026
Today Tonight and Wednesday. Waves 0.5 metres or less.

Extended Forecast

Issued 03:00 AM EDT 09 June 2026
Thursday Wind light.
Friday Wind light becoming west 15 knots.
Saturday Wind west 15 knots.

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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 17 May 2026 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 9 June 2026 Today Tonight and Wednesday At 3:00 a.m. EDT today high 1026 mb located over New England.
By 3:00 a.m. EDT Wednesday high 1026 mb located off the East Coast
of the U.S.

At 3:00 a.m. EDT today weakening trough located on a line
north-south over Wisconsin.

By 3:00 a.m. EDT Wednesday approaching low 1007 mb located over
Lower Michigan.

By 3:00 a.m. EDT Wednesday approaching low 993 mb located over
southern Manitoba.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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