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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 17 April 2026

Today Tonight and Saturday.

Wind light becoming east 10 knots this evening then increasing to east 15 late overnight. Wind veering to southeast 15 Saturday morning then to southwest 20 Saturday afternoon. Wind veering to northwest 15 Saturday evening.

Showers Saturday afternoon and evening with a risk of thunderstorms. Fog patches dissipating Saturday evening.

Waves

Issued 10:30 AM EDT 17 April 2026
Today Tonight and Saturday. Waves 0.5 metres or less building to 0.5 to 1 early Saturday morning.

Extended Forecast

Issued 03:00 AM EDT 17 April 2026
Sunday Wind northwest 15 knots increasing to northwest 20 late in the day.
Monday Wind northwest 20 knots.
Tuesday Wind light becoming south 15 knots.

Ice Forecast*

Issued 12:00 PM EDT 17 April 2026 Today Tonight and Saturday Ice free.

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

 

[ Canadian Ice Service ]

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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
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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 17 April 2026 Today Tonight and Saturday

Ice Coverage

Ice free.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 17 April 2026 Today Tonight and Saturday At 10:30 a.m. EDT today departing trough located on a line
northeast-southwest over New England.

At 10:30 a.m. EDT today ridge located on a line north-south over
southern Ontario.
By 10:30 a.m. EDT Saturday ridge located on a line
northeast-southwest over New England.

At 10:30 a.m. EDT today low 998 mb located over western Iowa.
By 10:30 a.m. EDT Saturday low 990 mb located over James Bay.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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