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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 15 October 2026

Today Tonight and Friday.

Strong wind warning in effect.

Wind northeast 15 knots veering to east 15 this afternoon then to southeast 15 this evening. Wind increasing to southeast 25 late overnight then veering to southwest 25 Friday morning. Wind veering to northwest 25 Friday afternoon then to north 25 Friday evening.

Rain beginning near midnight with a risk of thunderstorms changing to scattered showers near noon Friday.

Waves

Issued 10:30 AM EDT 15 October 2026
Today Tonight and Friday. Waves 0.5 to 1 metre building to 2 early Friday morning.

Extended Forecast

Issued 03:00 AM EDT 15 October 2026
Saturday Wind north 25 knots backing to west 20 in the afternoon.
Sunday Wind southwest 15 knots increasing to southwest 20.
Monday Wind southwest 15 knots diminishing to light late in the day.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Hamilton Munro Int'l Airport CFB Trenton Erieau Toronto City Centre Airport Point Pelee Peterborough Municipal Airport Burlington Lift Bridge Point Petre Cobourg Oshawa Executive Airport South Lake Huron - 45149 Port Colborne Brockville 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 Windsor Airport Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Welland-Pelham Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Sarnia Chris Hadfield Airport Vineland Station Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Tobermory
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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 10:30 AM EDT 15 October 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 October 2026 Today Tonight and Friday At 10:30 a.m. EDT today high 1027 mb located northeast of Georgian
Bay.
By 10:30 a.m. EDT Friday departing high 1022 mb located off the
East Coast of the U.S.

At 10:30 a.m. EDT today low 1013 mb located over southern Manitoba.
By 10:30 a.m. EDT Friday deepening low 996 mb located over southern
Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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