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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 08 June 2026

Today Tonight and Tuesday.

Wind northeast 10 knots becoming light near midnight. Wind light Tuesday.

Scattered showers Tuesday evening with a risk of thunderstorms. Fog patches dissipating near noon.

Waves

Issued 10:30 AM EDT 08 June 2026
Today Tonight and Tuesday. Waves 0.5 metres or less.

Extended Forecast

Issued 03:00 AM EDT 08 June 2026
Wednesday Wind light becoming southwest 15 knots in the afternoon.
Thursday Wind southwest 15 knots.
Friday Wind west 15 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 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 8 June 2026 Today Tonight and Tuesday At 10:30 a.m. EDT today high 1026 mb located over eastern Ontario.
By 10:30 a.m. EDT Tuesday high 1026 mb located over the East Coast
of the U.S.

At 10:30 a.m. EDT today trough located on a line north-south over
southern Manitoba.
By 10:30 a.m. EDT Tuesday trough located on a line north-south
over northern Ontario.

By 10:30 a.m. EDT Tuesday approaching low 1010 mb located over
Lower Michigan.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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