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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 08 March 2026

Today Tonight and Monday.

Wind west 25 knots backing to southwest 20 this morning then diminishing to southwest 15 this evening. Wind diminishing to south 10 near midnight then increasing to south 15 overnight. Wind veering to southwest 15 near noon Monday.

Scattered showers and fog patches ending early this morning.

Waves

Issued 03:00 AM EDT 08 March 2026
Today Tonight and Monday. Over open water waves 1.5 metres subsiding to 1 early this afternoon.

Extended Forecast

Issued 03:00 AM EDT 08 March 2026
Tuesday Wind southwest 10 to 15 knots becoming light in the afternoon.
Wednesday Wind east 20 knots increasing to southwest 25 late in the day.
Thursday Wind west 30 knots.

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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 16 May 2025 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 8 March 2026 Today Tonight and Monday At 3:00 a.m. EDT today trough located on a line northeast-southwest
over the St. Lawrence River.
By 3:00 a.m. EDT Monday departing trough located on a line
northeast-southwest over Nova Scotia.

At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over northeastern Ontario.
By 3:00 a.m. EDT Monday weakening ridge located on a line
northeast-southwest over the Eastern Seaboard.

At 3:00 a.m. EDT today low 985 mb located over the Ontario -
Manitoba border.
By 3:00 a.m. EDT Monday low 984 mb located northeast of James Bay.

By 3:00 a.m. EDT Monday approaching low 988 mb located near Lake
of the Woods.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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