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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 12 May 2026

Today Tonight and Wednesday.

Strong wind warning in effect.

Wind variable 10 knots becoming southeast 10 early this evening then increasing to southeast 15 late overnight. Wind increasing to southeast 20 early Wednesday morning then veering to south 20 near noon Wednesday. Wind diminishing to southwest 15 Wednesday afternoon.

Scattered showers overnight and Wednesday. Risk of thunderstorms Wednesday morning and afternoon.

Waves

Issued 10:30 AM EDT 12 May 2026
Today Tonight and Wednesday. Waves 0.5 metres or less building to 1 to 1.5 early Wednesday morning.

Extended Forecast

Issued 03:00 AM EDT 12 May 2026
Thursday Wind light.
Friday Wind light becoming west 15 knots.
Saturday Wind west 15 knots.

Ice Forecast*

Issued 12:00 PM EDT 11 May 2026 Today Tonight and Tuesday Ice free.

*Ice Forecast and Warnings also apply to U.S. waters

 

[ Canadian Ice Service ]

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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 11 May 2026 Today Tonight and Tuesday

Ice Coverage

Ice free.

Warnings

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 10:30 AM EDT 12 May 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 or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 12 May 2026 Today Tonight and Wednesday At 10:30 a.m. EDT today ridge located on a line north-south over
southern Ontario.
By 10:30 a.m. EDT Wednesday ridge located on a line north-south
over Quebec.

At 10:30 a.m. EDT today low 1003 mb located over Minnesota.
By 10:30 a.m. EDT Wednesday low 1003 mb located over northern
Lake Huron.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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