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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 28 April 2025

Today Tonight and Tuesday.

Wind variable 10 knots becoming east 10 this afternoon then increasing to southeast 15 this evening. Wind veering to south 20 late overnight then to southwest 25 Tuesday afternoon.

Scattered showers Tuesday afternoon and evening with a risk of thunderstorms.

Waves

Issued 10:30 AM EDT 28 April 2025
Today Tonight and Tuesday. Waves 0.5 metres or less building to 1 to 1.5 early Tuesday morning and to 2 Tuesday evening.

Extended Forecast

Issued 03:00 AM EDT 28 April 2025
Wednesday Wind west 20 knots diminishing to light in the afternoon.
Thursday Wind light becoming east 15 knots.
Friday Wind south 15 knots increasing to southwest 25.

Ice Forecast*

Issued 12:00 PM EDT 27 April 2025 Today Tonight and Monday 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 27 April 2025 Today Tonight and Monday

Ice Coverage

Ice free.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 28 April 2025 Today Tonight and Tuesday At 10:30 a.m. EDT today departing ridge located on a line
north-south over eastern Ontario.

At 10:30 a.m. EDT today departing trough located on a line
northeast-southwest over northern Ontario.

At 10:30 a.m. EDT today low 995 mb located over southeastern
South Dakota.
By 10:30 a.m. EDT Tuesday low 997 mb located over northeastern
Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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