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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 06 November 2026

Today Tonight and Saturday.

Strong wind warning in effect.

Wind south 10 knots becoming variable 10 this morning then becoming west 10 this afternoon. Wind increasing to west 20 this evening then diminishing to west 15 Saturday morning. Wind veering to northwest 15 Saturday evening.

Showers.

Waves

Issued 03:00 AM EST 06 November 2026
Today Tonight and Saturday. Waves 0.5 metres or less building to 1 to 1.5 near midnight then subsiding to 0.5 to 1 Saturday morning.

Extended Forecast

Issued 03:00 AM EST 06 November 2026
Sunday Wind northwest 20 knots increasing to west 30 in the morning.
Monday Wind west 30 knots diminishing to west 15.
Tuesday Wind west 25 knots.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas St. Catharines / Niagara District Airport Burlington Lift Bridge Point Pelee Cobourg Hamilton Munro Int'l Airport Oshawa Executive Airport Point Petre Toronto City Centre Airport CFB Trenton Peterborough Municipal Airport Ajax - 45159 Erieau Lagoon City Collingwood Kingston Airport Grenadier Island Brockville Gore Bay-Manitoulin Airport North Bay Airport Greater Sudbury Airport Killarney Sault Ste. Marie Airport Port Colborne North Channel - 45154 Lake Nipissing - 45152 Lake Simcoe - 45151 South Lake Huron - 45149 Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Windsor Airport Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Goderich Sarnia Chris Hadfield Airport Tobermory Long Point Harrow AAFC Port Weller Southeast Shoal Vineland Station Welland-Pelham
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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

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 04:10 AM EST 06 November 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EST 6 November 2026 Today Tonight and Saturday At 3:00 a.m. EST today low 1007 mb located over Lake Huron.
By 3:00 a.m. EST Saturday low 1006 mb located over New England.

At 3:00 a.m. EST today ridge located on a line northeast-southwest
over northwestern Ontario.
By 3:00 a.m. EST Saturday ridge located on a line
northeast-southwest over Lake Superior.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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