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Northern Lake Huron

Forecast

Marine Forecast

Issued 03:00 AM EDT 01 July 2026

Today Tonight and Thursday.

Wind southwest 15 knots diminishing to variable 10 this morning then increasing to southwest 15 this evening. Wind veering to west 15 overnight then diminishing to variable 10 Thursday morning.

Scattered showers and fog patches with a risk of thunderstorms.

Waves

Issued 03:00 AM EDT 01 July 2026
Today Tonight and Thursday. Waves 0.5 to 1 metre.

Extended Forecast

Issued 03:00 AM EDT 01 July 2026
Friday Wind light.
Saturday Wind light.
Sunday 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

Lake Huron

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.

Ice Forecasts

Lake Michigan

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Squall warning in effect

Northern Lake Huron

Issued 08:00 AM EDT 01 July 2026 Squalls with wind gusts up to 35 knots are expected or occurring in the area.

Thunderstorms south of Manitoulin are moving towards the east at 25 knots.

Mariners are advised to prepare for squalls. If underway, seek safe harbour immediately. Consider delaying or postponing travel in areas under the squall warning.

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 3:00 AM EDT 1 July 2026 Today Tonight and Thursday At 3:00 a.m. EDT today quasi-stationary ridge located on a line
northeast-southwest over the Eastern Seaboard.

At 3:00 a.m. EDT today low 992 mb located over central Manitoba.
By 3:00 a.m. EDT Thursday trough located on a line east-west over
northern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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