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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 15 June 2026

Today Tonight and Tuesday.

Strong wind warning in effect.

Wind west 15 knots increasing to west 20 early this morning then diminishing to west 15 early this evening. Wind diminishing to southwest 10 overnight then backing to south 10 Tuesday afternoon.

Waves

Issued 03:00 AM EDT 15 June 2026
Today Tonight and Tuesday. Waves 1 metre building to 1 to 1.5 early this morning then subsiding to 0.5 to 1 this evening. Waves subsiding to 0.5 or less Tuesday morning.

Extended Forecast

Issued 03:00 AM EDT 15 June 2026
Wednesday Wind light.
Thursday Wind south 25 knots veering to west 25 late in the day.
Friday Wind west 20 knots.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas CFB Trenton Port Colborne - 45142 Hamilton Munro Int'l Airport Oshawa Executive Airport Port Stanley - 45132 Lake Nipissing - 45152 Point Petre Georgian Bay - 45137 Toronto City Centre Airport Lake Simcoe - 45151 South Georgian Bay - 45143 Prince Edward Point - 45135 Peterborough Municipal Airport South Lake Huron - 45149 Collingwood Lake St Clair - 45147 Grimsby - 45139 Goderich Lagoon City Kingston Airport Muskoka Airport Parry Sound Harbour Grenadier Island Lake Simcoe Regional Airport Wiarton Airport Brockville Western Islands Cove Island Great Duck Island North Channel - 45154 Sarnia Chris Hadfield Airport Gore Bay-Manitoulin Airport Tobermory Harrow AAFC Long Point North Bay Airport Port Weller St. Catharines / Niagara District Airport Greater Sudbury Airport Southeast Shoal Vineland Station Port Colborne Erieau Cobourg Sault Ste. Marie Airport Windsor Airport Welland-Pelham Killarney Ajax - 45159 Point Pelee Burlington Lift Bridge
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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 17 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 07:03 AM EDT 15 June 2026

'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.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 15 June 2026 Today Tonight and Tuesday At 10:30 a.m. EDT today low 1003 mb located over northwestern
Ontario.
By 10:30 a.m. EDT Tuesday low 1003 mb located over Upper Michigan.

At 10:30 a.m. EDT today ridge located on a line northwest-southeast
over southern Ontario.
By 10:30 a.m. EDT Tuesday ridge located on a line
northeast-southwest over New York State.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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