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Southern Lake Huron

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 13 April 2026

Tonight and Tuesday.

Wind west 10 knots becoming east 10 this evening then increasing to south 15 late overnight. Wind veering to southwest 15 Tuesday morning then diminishing to north 10 Tuesday evening.

Scattered showers and fog patches overnight and Tuesday with a risk of thunderstorms.

Waves

Issued 06:30 PM EDT 13 April 2026
Tonight and Tuesday. Waves 0.5 metres or less building to 0.5 to 1 early Tuesday morning then subsiding to 0.5 or less Tuesday evening.

Extended Forecast

Issued 06:30 PM EDT 13 April 2026
Wednesday Wind light becoming south 15 knots in the morning then diminishing to light in the afternoon.
Thursday Wind southwest 15 knots veering to northwest 15.
Friday Wind northwest 15 knots diminishing to light late in the day.

Ice Forecast*

Issued 12:00 PM EDT 13 April 2026 Today Tonight and Tuesday 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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Ice Conditions

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

Ice Forecasts

Southern Lake Huron

Issued 12:00 PM EDT 13 April 2026 Today Tonight and Tuesday

Ice Coverage

Ice free.

Ice Forecasts

Northern Lake Michigan

Issued 12:00 PM EDT 13 April 2026 Today Tonight and Tuesday

Ice Coverage

Open water except 1 tenth thick lake ice north of Fox Islands.
Consolidated rotten thick lake ice in and near the Straits of
Mackinac.

Ice Forecasts

Southern Lake Michigan

Issued 12:00 PM EDT 13 April 2026 Today Tonight and Tuesday

Ice Coverage

Ice free.

Ice Forecasts

Green Bay

Issued 12:00 PM EDT 13 April 2026 Today Tonight and Tuesday

Ice Coverage

1 tenth thick lake ice. Consolidated rotten thick lake ice in Bays
de Noc.

Warnings

Watches (In effect)

Squall watch in effect

Southern Lake Huron

Issued 10:43 PM EDT 13 April 2026 Conditions are favourable for the development of squalls with wind gusts up to 35 knots, frequent lightning and hail.

A cluster of thunderstorms is expected to move across southern Lake Huron late this evening into overnight.

Vessels without lightning protection should make their way to shore immediately. Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway.

Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 13 April 2026 Tonight and Tuesday At 6:30 p.m. EDT tonight ridge located over northern Ontario.
By 6:30 p.m. EDT Tuesday departing ridge located on a line
northwest-southeast over northern Quebec.

At 6:30 p.m. EDT tonight low 999 mb located over eastern Nebraska.
By 6:30 p.m. EDT Tuesday low 1005 mb located over eastern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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