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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 20 June 2025

Today Tonight and Saturday.

Wind west 15 knots diminishing to southwest 10 this morning then becoming light this evening. Wind becoming southeast 10 Saturday morning then increasing to southwest 15 Saturday afternoon.

Scattered showers this afternoon tonight and Saturday with a risk of thunderstorms.

Waves

Issued 03:00 AM EDT 20 June 2025
Today Tonight and Saturday. Waves 0.5 to 1 metre subsiding to 0.5 or less near noon then building to 0.5 to 1 Saturday evening.

Extended Forecast

Issued 03:00 AM EDT 20 June 2025
Sunday Wind southwest 15 knots.
Monday Wind southwest 15 knots.
Tuesday Wind southwest 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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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 20 June 2025 Today Tonight and Saturday At 3:00 a.m. EDT today departing low 997 mb located near Montréal.

At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over northeastern Ontario.
By 3:00 a.m. EDT Saturday weakening ridge located on a line
north-south over western Quebec.

By 3:00 a.m. EDT Saturday approaching low 995 mb located over
western Minnesota.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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