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Western Lake Ontario


Marine Forecast

Issued 03:00 AM EDT 13 June 2024

Today Tonight and Friday.

Strong wind warning in effect.

Wind south 10 knots increasing to southwest 15 early this morning and to southwest 20 this afternoon. Wind diminishing to west 10 near midnight then becoming light Friday morning. Wind becoming northwest 10 Friday evening.

Scattered showers tonight with a risk of thunderstorms.


Issued 03:00 AM EDT 13 June 2024
Today Tonight and Friday. Waves 0.5 metres or less building to 0.5 to 1 this morning then subsiding to 0.5 or less overnight.

Extended Forecast

Issued 03:00 AM EDT 13 June 2024
Saturday Wind north 15 knots diminishing to light in the afternoon.
Sunday Wind light.
Monday Wind light.

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Map of Great Lakes - Lake Erie and Lake Ontario 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

Western Lake Ontario

Issued 03:00 AM EDT 13 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.


Technical Marine Synopsis

Issued 3:00 AM EDT 13 June 2024 Today Tonight and Friday At 3:00 a.m. EDT today low 1002 mb located near Thunder Bay.
By 3:00 a.m. EDT Friday low 997 mb located east of James Bay.

At 3:00 a.m. EDT today cold front located on a line
northeast-southwest over Minnesota.
By 3:00 a.m. EDT Friday cold front from low located on a line
northeast-southwest over southern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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