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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EST 06 February 2026

Today Tonight and Saturday.

Wind southwest 10 knots increasing to west 15 this afternoon and to northwest 30 near midnight. Wind diminishing to northwest 20 Saturday afternoon.

Snow changing to flurries near midnight and ending near noon Saturday. Visibility 1 mile or less in flurries.

Freezing spray warning in effect.

Risk of freezing spray near midnight. Freezing spray beginning overnight and ending early Saturday morning. Risk of freezing spray Saturday morning and afternoon.

Waves

Issued 10:30 AM EST 06 February 2026
Today Tonight and Saturday. Over open water waves 1.5 to 2 metres.

Extended Forecast

Issued 03:00 AM EST 06 February 2026
Sunday Wind north 15 knots diminishing to light in the afternoon then becoming northwest 15 late in the day.
Monday Wind light.
Tuesday Wind light.

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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 16 May 2025 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Freezing spray warning in effect

Eastern Lake Ontario

Issued 10:30 AM EST 06 February 2026

Moderate or severe freezing spray is occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EST 6 February 2026 Today Tonight and Saturday At 10:30 a.m. EST today cold front from 992 mb low located on a
line northeast-southwest over northeastern Ontario.
By 10:30 a.m. EST Saturday departing cold front from 1012 mb low
located on a line north-south over New Hampshire.

At 10:30 a.m. EST today ridge located on a line north-south over
Manitoba.
By 10:30 a.m. EST Saturday ridge located on a line north-south
over Wisconsin.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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