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Eastern Lake Ontario


Marine Forecast

Issued 03:00 AM EDT 15 July 2024

Today Tonight and Tuesday.

Strong wind warning in effect.

Wind southwest 10 knots becoming variable 10 near noon then increasing to southwest 15 to 20 this afternoon. Wind diminishing to southwest 10 this evening then backing to south 10 overnight. Wind increasing to southwest 25 Tuesday morning then diminishing to west 15 Tuesday evening.

Showers this afternoon and this evening with a risk of thunderstorms. Scattered showers Tuesday with a risk of thunderstorms.


Issued 03:00 AM EDT 15 July 2024
Today Tonight and Tuesday. Waves 0.5 metres or less building to 0.5 to 1 this afternoon then subsiding to 0.5 or less this evening. Waves building to 1 to 1.5 near noon Tuesday.

Extended Forecast

Issued 03:00 AM EDT 15 July 2024
Wednesday Wind west 15 knots.
Thursday Wind northwest 15 knots.
Friday Wind north 15 knots diminishing to light.

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Map of Great Lakes - Lake Huron marine weather areas N Huron - 45003 W Erie - 45005 S Huron - 45008 Lake Ontario - 45012 Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Great Duck Island Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Cove Island Goderich Sarnia Chris Hadfield Airport Tobermory Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal Vineland Station Welland-Pelham Windsor Airport Port Colborne Erieau Point Pelee Burlington Lift Bridge Cobourg Hamilton Munro Int'l Airport Oshawa Executive Airport Point Petre Toronto City Centre Airport CFB Trenton Peterborough Municipal Airport
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 27 April 2024 Forecasts have ended for the season.

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 08:03 AM EDT 15 July 2024

'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.


Technical Marine Synopsis

Issued 3:00 AM EDT 15 July 2024 Today Tonight and Tuesday At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over western North Carolina.
By 3:00 a.m. EDT Tuesday departing ridge located off the East
Coast of the U.S.

At 3:00 a.m. EDT today low 1000 mb located east of James Bay.
By 3:00 a.m. EDT Tuesday low 996 mb located over northern Quebec.

At 3:00 a.m. EDT today low 1007 mb located over North Dakota.
By 3:00 a.m. EDT Tuesday low 1000 mb located over Sault Ste. Marie.

Great Lakes - Lake Huron Area

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