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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 09 June 2026

Today Tonight and Wednesday.

Wind light becoming southeast 10 knots near midnight then increasing to southeast 15 early Wednesday morning. Wind diminishing to southwest 10 near noon Wednesday.

Scattered showers and fog patches this afternoon tonight and Wednesday with a risk of thunderstorms.

Waves

Issued 10:30 AM EDT 09 June 2026
Today Tonight and Wednesday. Waves 0.5 metres or less building to 0.5 to 1 Wednesday morning then subsiding to 0.5 or less Wednesday afternoon.

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 10:30 AM EDT 9 June 2026 Today Tonight and Wednesday At 10:30 a.m. EDT today departing high 1026 mb located southeast
of Pennsylvania.

At 10:30 a.m. EDT today low 1012 mb located over southern Wisconsin.
By 10:30 a.m. EDT Wednesday low 1007 mb located east of Georgian
Bay.

By 10:30 a.m. EDT Wednesday approaching low 991 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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