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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 08 June 2026

Today Tonight and Tuesday.

Wind east 10 knots backing to northeast 10 near noon then becoming light near midnight. Wind light Tuesday.

Scattered showers Tuesday late in the day 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 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 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 Erie and Lake Ontario Area

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Marine Weather for Canada

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