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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 30 April 2025

Today Tonight and Thursday.

Wind variable 10 knots becoming northeast 10 near midnight then increasing to northeast 15 early Thursday morning. Wind veering to east 20 Thursday afternoon then diminishing to variable 10 Thursday evening.

Showers Thursday afternoon and evening with a risk of thunderstorms. Fog patches forming Thursday evening.

Waves

Issued 10:30 AM EDT 30 April 2025
Today Tonight and Thursday. Waves 0.5 metres or less building to 0.5 to 1 early Thursday morning and to 1 to 1.5 Thursday evening.

Extended Forecast

Issued 03:00 AM EDT 30 April 2025
Friday Wind south 15 knots increasing to southwest 25 in the afternoon then diminishing to west 15 late in the day.
Saturday Wind light.
Sunday Wind light becoming north 15 knots.

Ice Forecast*

Issued 12:00 PM EDT 30 April 2025 Today Tonight and Thursday 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 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 30 April 2025 Today Tonight and Thursday

Ice Coverage

Ice free.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 30 April 2025 Today Tonight and Thursday At 10:30 a.m. EDT today high 1025 mb located over northeastern
Ontario.
By 10:30 a.m. EDT Thursday high 1024 mb located over eastern Quebec.

By 10:30 a.m. EDT Thursday approaching low 1004 mb located over
Lake Michigan.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

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