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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 15 July 2025

Today Tonight and Wednesday.

Wind light becoming south 10 knots near noon Wednesday then increasing to south 15 Wednesday evening.

Scattered showers Wednesday evening with a risk of thunderstorms. Fog patches dissipating near noon.

Waves

Issued 10:30 AM EDT 15 July 2025
Today Tonight and Wednesday. Waves 0.5 metres or less building to 0.5 to 1 Wednesday evening.

Extended Forecast

Issued 03:00 AM EDT 15 July 2025
Thursday Wind light becoming southwest 15 knots in the morning then veering to northwest 15 late in the day.
Friday Wind north 15 knots diminishing to light.
Saturday Wind light.

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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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 15 July 2025 Today Tonight and Wednesday At 10:30 a.m. EDT today ridge located on a line northeast-southwest
over Pennsylvania.
By 10:30 a.m. EDT Wednesday ridge located on a line
northeast-southwest over the East Coast of the U.S.

At 10:30 a.m. EDT today low 1010 mb located over Minnesota.
By 10:30 a.m. EDT Wednesday low 1010 mb located over central Quebec.

At 10:30 a.m. EDT today low 1005 mb located over Nebraska.
By 10:30 a.m. EDT Wednesday low 1009 mb located over southern
Minnesota.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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