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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 08 July 2025

Today Tonight and Wednesday.

Wind north 10 knots becoming light early this morning. Wind light tonight and Wednesday.

Scattered showers Wednesday afternoon and evening with a risk of thunderstorms.

Waves

Issued 03:00 AM EDT 08 July 2025
Today Tonight and Wednesday. Waves less than 0.5 metres.

Extended Forecast

Issued 03:00 AM EDT 08 July 2025
Thursday Wind light.
Friday Wind light.
Saturday Wind light becoming east 15 knots.

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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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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 16 May 2025 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 8 July 2025 Today Tonight and Wednesday At 3:00 a.m. EDT today departing low 1012 mb located over Maine.

At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over northeastern Ontario.
By 3:00 a.m. EDT Wednesday ridge located on a line
northeast-southwest over southern Ontario.

At 3:00 a.m. EDT today low 1015 mb located over northern Minnesota.
By 3:00 a.m. EDT Wednesday low 1014 mb located over central Lake
Michigan.

By 3:00 a.m. EDT Wednesday ridge located on a line
northeast-southwest over northwestern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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