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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 11 March 2026

Today Tonight and Thursday.

Gale warning in effect.

Wind northeast 20 knots diminishing to northeast 15 near noon then increasing to southwest 30 this evening. Wind increasing to west 35 near midnight then diminishing to west 30 Thursday morning. Wind veering to northwest 25 Thursday afternoon then increasing to northwest 30 Thursday evening.

Drizzle and fog patches changing to showers this afternoon with a risk of thunderstorms then to scattered flurries Thursday morning.

Waves

Issued 10:30 AM EDT 11 March 2026
Today Tonight and Thursday. Over open water waves 1 to 1.5 metres subsiding to 0.5 to 1 this afternoon then building to 2 near midnight. Waves subsiding to 1.5 Thursday evening.

Extended Forecast

Issued 03:00 AM EDT 11 March 2026
Friday Wind northwest 15 knots increasing to southwest 25 in the afternoon.
Saturday Wind west 35 knots diminishing to west 15 late in the day.
Sunday Wind east 20 knots increasing to east 30.

Ice Forecast*

Issued 12:00 PM EDT 11 March 2026 Today Tonight and Thursday Open water except 2 tenths thick lake ice in the northeastern section. Consolidated rotten thick lake ice along parts of the shore and in the Bay of Quinte.

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

 

[ Canadian Ice Service ]

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

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

Ice Forecasts

Issued 12:00 PM EDT 11 March 2026 Today Tonight and Thursday

Ice Coverage

Open water except 2 tenths thick lake ice in the northeastern
section. Consolidated rotten thick lake ice along parts of the shore
and in the Bay of Quinte.

Warnings

Warnings (In effect)

Gale warning in effect

Eastern Lake Ontario

Issued 10:30 AM EDT 11 March 2026

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. 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 10:30 AM EDT 11 March 2026 Today Tonight and Thursday At 10:30 a.m. EDT today deepening low 998 mb located over eastern
Michigan.
By 10:30 a.m. EDT Thursday low 993 mb located over eastern Quebec.

By 10:30 a.m. EDT Thursday ridge located on a line north-south
over northern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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