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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 16 July 2025

Today Tonight and Thursday.

Strong wind warning in effect.

Wind light becoming south 10 knots near noon then increasing to southwest 20 near noon Thursday. Wind veering to northwest 20 Thursday evening.

Scattered showers tonight and Thursday with a risk of thunderstorms.

Waves

Issued 03:00 AM EDT 16 July 2025
Today Tonight and Thursday. Waves 0.5 metres or less building to 0.5 to 1 this evening and to 1.5 Thursday afternoon.

Extended Forecast

Issued 03:00 AM EDT 16 July 2025
Friday Wind north 15 knots diminishing to light in the morning.
Saturday Wind light.
Sunday Wind west 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 Burlington Lift Bridge Oshawa Executive Airport Point Pelee Peterborough Municipal Airport Point Petre Hamilton Munro Int'l Airport Erieau Cobourg Toronto City Centre Airport Port Colborne CFB Trenton South Lake Huron - 45149 Windsor Airport Great Duck Island 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 Welland-Pelham Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Vineland Station Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Cove Island Goderich Sarnia Chris Hadfield Airport Western Islands Tobermory Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal
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land station Land Station
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

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 03:00 AM EDT 16 July 2025

'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 or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 16 July 2025 Today Tonight and Thursday At 3:00 a.m. EDT today trough located on a line northeast-southwest
over Whitefish Bay.
By 3:00 a.m. EDT Thursday trough located on a line
northeast-southwest over Georgian Bay.

At 3:00 a.m. EDT today low 1010 mb located over Iowa.
By 3:00 a.m. EDT Thursday low 1006 mb located over Lower Michigan.

At 3:00 a.m. EDT today high 1025 mb located over southeastern
Alberta.
By 3:00 a.m. EDT Thursday high 1020 mb located over North Dakota.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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