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Western Lake Ontario


Marine Forecast

Issued 10:30 AM EDT 22 June 2024

Today Tonight and Sunday.

Strong wind warning in effect.

Wind variable 10 knots becoming east 10 early this evening then increasing to east 15 near midnight. Wind becoming southwest 15 early Sunday morning then increasing to southwest 25 late Sunday morning. Wind veering to west 20 Sunday evening.

Scattered showers with a risk of thunderstorms. Fog patches dissipating near noon.


Issued 10:30 AM EDT 22 June 2024
Today Tonight and Sunday. Waves 0.5 metres or less building to 0.5 to 1 late overnight and to 2 near noon Sunday. Waves subsiding to 1 Sunday evening.

Extended Forecast

Issued 03:00 AM EDT 22 June 2024
Monday Wind light.
Tuesday Wind light becoming southwest 15 knots late in the day.
Wednesday Wind southwest 15 knots.

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Weather Conditions

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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

Lake Ontario

Issued 10:30 AM EDT 22 June 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.

Watches (In effect)

Squall watch in effect

Western Lake Ontario

Issued 12:48 PM EDT 22 June 2024 Conditions are favourable for the development of squalls with wind gusts up to 45 knots, frequent lightning, hail and poor to very poor visibility in thunderstorms heavy at times.

Thunderstorms are possible from early this afternoon through this evening.

Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway. Consider delaying or postponing travel in areas under the Squall Watch.

Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.


Technical Marine Synopsis

Issued 10:30 AM EDT 22 June 2024 Today Tonight and Sunday At 10:30 a.m. EDT today departing ridge located on a line
northwest-southeast over northeastern Ontario.

At 10:30 a.m. EDT today low 1006 mb located over eastern Nebraska.
By 10:30 a.m. EDT Sunday low 996 mb located over eastern Ontario.

Great Lakes - Lake Huron Area

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