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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 04 September 2026

Today Tonight and Saturday.

Wind light becoming west 10 knots near noon then veering to northwest 10 early this evening. Wind veering to north 10 near midnight then becoming light early Saturday morning.

Waves

Issued 10:30 AM EDT 04 September 2026
Today Tonight and Saturday. Waves 0.5 metres or less.

Extended Forecast

Issued 03:00 AM EDT 04 September 2026
Sunday Wind light.
Monday Wind light.
Tuesday Wind light.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Hamilton Munro Int'l Airport CFB Trenton Erieau Toronto City Centre Airport Point Pelee Peterborough Municipal Airport Burlington Lift Bridge Point Petre Cobourg Oshawa Executive Airport South Lake Huron - 45149 Port Colborne Brockville 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 Windsor Airport Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Welland-Pelham Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Sarnia Chris Hadfield Airport Vineland Station Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Tobermory
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 17 May 2026 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 4 September 2026 Today Tonight and Saturday At 10:30 a.m. EDT today low 1007 mb located over western Nova
Scotia.
By 10:30 a.m. EDT Saturday low 996 mb located east of Nova Scotia.

At 10:30 a.m. EDT today ridge located on a line northwest-southeast
over North Channel.
By 10:30 a.m. EDT Saturday ridge located on a line
northeast-southwest over Lake Nipigon.

By 10:30 a.m. EDT Saturday approaching trough located on a line
northeast-southwest over Manitoba.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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