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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 16 April 2026

Today Tonight and Friday.

Wind variable 10 knots increasing to southwest 15 near noon then veering to northwest 15 near midnight. Wind diminishing to north 10 Friday morning then becoming light near noon Friday. Wind becoming east 10 Friday evening.

Showers with a risk of thunderstorms changing to drizzle Friday morning and ending near noon Friday. Fog patches.

Waves

Issued 03:00 AM EDT 16 April 2026
Today Tonight and Friday. Waves 0.5 metres or less building to 0.5 to 1 this afternoon then subsiding to 0.5 or less Friday morning.

Extended Forecast

Issued 03:00 AM EDT 16 April 2026
Saturday Wind light increasing to southwest 20 knots late in the day.
Sunday Wind west 20 knots veering to northwest 25 late in the day.
Monday Wind northwest 20 knots.

Ice Forecast*

Issued 12:00 PM EDT 15 April 2026 Today Tonight and Thursday Ice free.

*Ice Forecast and Warnings also apply to U.S. waters

 

[ Canadian Ice Service ]

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Weather Conditions

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas CFB Trenton Port Colborne - 45142 Hamilton Munro Int'l Airport Oshawa Executive Airport Port Stanley - 45132 Lake Nipissing - 45152 Point Petre Georgian Bay - 45137 Toronto City Centre Airport Lake Simcoe - 45151 South Georgian Bay - 45143 Prince Edward Point - 45135 Peterborough Municipal Airport South Lake Huron - 45149 Collingwood Lake St Clair - 45147 Grimsby - 45139 Goderich Lagoon City Kingston Airport Muskoka Airport Parry Sound Harbour Grenadier Island Lake Simcoe Regional Airport Wiarton Airport Brockville Western Islands Cove Island Great Duck Island North Channel - 45154 Sarnia Chris Hadfield Airport Gore Bay-Manitoulin Airport Tobermory Harrow AAFC Long Point North Bay Airport Port Weller St. Catharines / Niagara District Airport Greater Sudbury Airport Southeast Shoal Vineland Station Port Colborne Erieau Cobourg Sault Ste. Marie Airport Windsor Airport Welland-Pelham Killarney Ajax - 45159 Point Pelee Burlington Lift Bridge
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 15 April 2026 Today Tonight and Thursday

Ice Coverage

Ice free.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 16 April 2026 Today Tonight and Friday At 3:00 a.m. EDT today trough located on a line east-west over
southern Ontario.
By 3:00 a.m. EDT Friday trough located on a line east-west over
New England.

At 3:00 a.m. EDT today low 1005 mb located over northwestern
Ontario.
By 3:00 a.m. EDT Friday low 1007 mb located over northern Quebec.

At 3:00 a.m. EDT today low 998 mb located over eastern Montana.
By 3:00 a.m. EDT Friday low 998 mb located over eastern South
Dakota.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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