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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 15 September 2026

Today Tonight and Wednesday.

Strong wind warning in effect.

Wind light increasing to south 15 knots early this morning and to south 20 early this evening. Wind diminishing to southwest 15 overnight and to west 10 Wednesday morning. Wind increasing to northeast 15 Wednesday evening.

Scattered showers tonight and Wednesday morning.

Waves

Issued 03:00 AM EDT 15 September 2026
Today Tonight and Wednesday. Waves 0.5 metres or less building to 0.5 to 1 this morning and to 1 to 1.5 this evening. Waves subsiding to 0.5 to 1 Wednesday morning and to 0.5 or less near noon Wednesday.

Extended Forecast

Issued 03:00 AM EDT 15 September 2026
Thursday Wind light becoming northwest 15 knots late in the day.
Friday Wind north 15 knots.
Saturday Wind east 15 knots.

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Map of Great Lakes - Lake Huron marine weather areas Erieau CFB Trenton Muskoka Airport Parry Sound Harbour Toronto City Centre Airport Lake Simcoe Regional Airport Wiarton Airport Point Petre Lagoon City Western Islands Cobourg Port Colborne Windsor Airport Point Pelee Welland-Pelham Vineland Station Burlington Lift Bridge Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Harrow AAFC Hamilton Munro Int'l Airport Tobermory Sarnia Chris Hadfield Airport Oshawa Executive Airport Collingwood Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Peterborough Municipal Airport Brockville Grenadier Island Kingston Airport
Legend:
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 03:00 AM EDT 15 September 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 3:00 AM EDT 15 September 2026 Today Tonight and Wednesday At 3:00 a.m. EDT today high 1027 mb located over New York State.
By 3:00 a.m. EDT Wednesday high 1027 mb located off the East Coast
of the U.S.

At 3:00 a.m. EDT today low 992 mb located over southeastern
Manitoba.
By 3:00 a.m. EDT Wednesday low 996 mb located over eastern
Hudson Bay.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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