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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 02 July 2025

Today Tonight and Thursday.

Wind west 10 knots increasing to west 15 near noon then backing to southwest 15 near midnight. Wind increasing to west 15 to 20 Thursday morning then becoming west 15 Thursday afternoon.

Scattered showers this afternoon and this evening with a risk of thunderstorms. Showers Thursday late in the day with a risk of thunderstorms.

Waves

Issued 03:00 AM EDT 02 July 2025
Today Tonight and Thursday. Waves 0.5 metres or less building to 0.5 to 1 this afternoon.

Extended Forecast

Issued 03:00 AM EDT 02 July 2025
Friday Wind light.
Saturday Wind light.
Sunday Wind southwest 15 knots diminishing to light.

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Map of Great Lakes - Lake Huron marine weather areas Cove Island Goderich Oshawa Executive Airport CFB Trenton Western Islands Wiarton Airport Point Petre Lake Simcoe Regional Airport Parry Sound Harbour Toronto City Centre Airport Muskoka Airport Lagoon City Brockville Hamilton Munro Int'l Airport Sarnia Chris Hadfield Airport Tobermory Cobourg Harrow AAFC Long Point Port Weller Burlington Lift Bridge St. Catharines / Niagara District Airport Southeast Shoal Point Pelee Vineland Station Welland-Pelham Erieau Windsor Airport Port Colborne Killarney South Georgian Bay - 45143 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Lake St Clair - 45147 South Lake Huron - 45149 Sault Ste. Marie Airport Lake Simcoe - 45151 Collingwood Greater Sudbury Airport North Bay Airport Kingston Airport Peterborough Municipal Airport Grenadier Island Port Colborne - 45142 Great Duck Island Ajax - 45159 Gore Bay-Manitoulin Airport North Channel - 45154 Lake Nipissing - 45152
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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 2 July 2025 Today Tonight and Thursday At 3:00 a.m. EDT today ridge located on a line north-south over
North Dakota.
By 3:00 a.m. EDT Thursday ridge located on a line north-south over
Thunder Bay.

At 3:00 a.m. EDT today cold front located on a line
northeast-southwest over northern Ontario.
By 3:00 a.m. EDT Thursday cold front located on a line east-west
over Wawa.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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