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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 02 July 2025

Today Tonight and Thursday.

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

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 overnight.

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 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
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 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 Erie and Lake Ontario Area

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Marine Weather for Canada

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