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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 01 June 2025

Today Tonight and Monday.

Strong wind warning in effect.

Wind northwest 15 knots backing to west 15 early this morning then increasing to west 20 near noon. Wind diminishing to west 15 early this evening and to west 10 near midnight. Wind increasing to west 15 Monday morning.

Waves

Issued 03:00 AM EDT 01 June 2025
Today Tonight and Monday. Waves 0.5 to 1 metre building to 1 to 1.5 this afternoon then subsiding to 0.5 to 1 this evening. Waves subsiding to 0.5 or less overnight then building to 0.5 to 1 near noon Monday.

Extended Forecast

Issued 03:00 AM EDT 01 June 2025
Tuesday Wind light becoming south 15 knots late in the day.
Wednesday Wind south 15 knots.
Thursday Wind light.

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

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

Ice Forecasts

Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 03:00 AM EDT 01 June 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 1 June 2025 Today Tonight and Monday At 3:00 a.m. EDT today low 982 mb located northwest of New
Brunswick.
By 3:00 a.m. EDT Monday departing low 994 mb located over western
Labrador.

At 3:00 a.m. EDT today ridge located on a line north-south over
western Lake Superior.
By 3:00 a.m. EDT Monday ridge located on a line north-south over
North Channel.

By 3:00 a.m. EDT Monday approaching trough located on a line
northeast-southwest over North Dakota.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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