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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 05 May 2025

Today Tonight and Tuesday.

Strong wind warning in effect.

Wind northeast 15 knots increasing to northeast 20 early this morning then veering to east 20 early this evening. Wind diminishing to east 15 Tuesday morning and to light near noon Tuesday. Wind becoming west 10 Tuesday evening.

Scattered showers. Risk of thunderstorms late this afternoon and this evening and Tuesday afternoon and evening. Fog patches forming this evening.

Waves

Issued 03:00 AM EDT 05 May 2025
Today Tonight and Tuesday. Waves 0.5 to 1 metre building to 1 to 1.5 this morning then subsiding to 0.5 to 1 Tuesday morning. Waves subsiding to 0.5 or less Tuesday afternoon.

Extended Forecast

Issued 03:00 AM EDT 05 May 2025
Wednesday Wind west 15 knots diminishing to light late in the day.
Thursday Wind light.
Friday Wind northeast 15 knots diminishing to light.

Ice Forecast*

Issued 12:00 PM EDT 4 May 2025 Today Tonight and Monday 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 Cove Island Goderich Oshawa Executive Airport CFB Trenton Western Islands Wiarton Airport Point Petre Lake Simcoe Regional Airport Parry Sound Harbour Toronto City Centre Airport Muskoka Airport Lagoon City Brockville Hamilton Munro Int'l Airport Sarnia Chris Hadfield Airport Tobermory Cobourg Harrow AAFC Long Point Port Weller Burlington Lift Bridge St. Catharines / Niagara District Airport Southeast Shoal Point Pelee Vineland Station Welland-Pelham Erieau Windsor Airport Port Colborne Killarney South Georgian Bay - 45143 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Lake St Clair - 45147 South Lake Huron - 45149 Sault Ste. Marie Airport Lake Simcoe - 45151 Collingwood Greater Sudbury Airport North Bay Airport Kingston Airport Peterborough Municipal Airport Grenadier Island Port Colborne - 45142 Great Duck Island Ajax - 45159 Gore Bay-Manitoulin Airport North Channel - 45154 Lake Nipissing - 45152
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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 4 May 2025 Today Tonight and Monday

Ice Coverage

Ice free.

Warnings

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 03:00 AM EDT 05 May 2025

'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 3:00 AM EDT 5 May 2025 Today Tonight and Tuesday At 3:00 a.m. EDT today ridge from 1028 mb high located on a line
east-west over eastern Lake Superior.
By 3:00 a.m. EDT Tuesday ridge from 1035 mb high located on a line
east-west over northeastern Ontario.

At 3:00 a.m. EDT today low 1010 mb located over southern Indiana.
By 3:00 a.m. EDT Tuesday low 1011 mb located over southern Lake
Huron.

At 3:00 a.m. EDT today trough located on a line northeast-southwest
over Manitoba.
By 3:00 a.m. EDT Tuesday trough located from North Dakota to
James Bay.

Great Lakes - Lake Huron Area

Another Region

Marine Weather for Canada

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