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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EST 05 March 2026

Today Tonight and Friday.

Wind northeast 20 knots increasing to northeast 25 early this evening then veering to east 20 early Friday morning. Wind diminishing to east 15 near noon Friday then increasing to southeast 25 Friday evening.

Periods of rain beginning this evening with a risk of freezing rain changing to periods of drizzle overnight and ending near noon Friday. Fog patches forming Friday evening.

Waves

Issued 10:30 AM EST 05 March 2026
Today Tonight and Friday. Over open water waves 0.5 to 1 metre building to 1 to 1.5 this evening then subsiding to 0.5 to 1 Friday morning.

Extended Forecast

Issued 03:00 AM EST 05 March 2026
Saturday Wind south 20 knots.
Sunday Wind west 25 knots.
Monday Wind southwest 20 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 10:30 AM EST 5 March 2026 Today Tonight and Friday At 10:30 a.m. EST today ridge located on a line northwest-southeast
over central Quebec.
By 10:30 a.m. EST Friday departing ridge located on a line
north-south over eastern Quebec.

At 10:30 a.m. EST today low 1015 mb located over Indiana.
By 10:30 a.m. EST Friday departing low 1018 mb located over the
East Coast of the U.S.

At 10:30 a.m. EST today trough located from North Dakota to Lake
of the Woods.
By 10:30 a.m. EST Friday trough located on a line north-south over
northwestern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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