Southern Lake Huron
Forecast
Marine Forecast
Issued 06:30 PM EDT 12 July 2025
Tonight and Sunday.
Strong wind warning in effect.
Wind southwest 20 knots diminishing to southwest 15 this evening and to west 10 late overnight. Wind backing to southwest 10 near noon Sunday.
Scattered showers ending Sunday morning with a risk of thunderstorms. Fog patches.
Waves
Issued 06:30 PM EDT 12 July 2025
Tonight and Sunday.
Waves 1 to 1.5 metres subsiding to 0.5 to 1 near midnight and to
0.5 or less early Sunday morning.
Extended Forecast
Issued 06:30 PM EDT 12 July 2025
Monday
Wind light becoming southwest 15 knots in the
morning then diminishing to light late in the day.
Tuesday
Wind light.
Wednesday
Wind southwest 15 knots.
Stay connected
Weather Conditions
Zoom-in to make a selection

Legend:


Ice Conditions
*Ice Forecast and Warnings also apply to U.S. waters
Ice Forecasts
Lake Huron
Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.Ice Forecasts
Lake Michigan
Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.Warnings
Warnings (In effect)
Strong wind warning in effect
Southern Lake Huron
Issued 6:30 PM EDT 12 July 2025'Strong' winds of 20 to 33 knots are 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.
Watches (In effect)
Squall watch in effect
Southern Lake Huron
Issued 6:52 PM EDT 12 July 2025 Conditions are favourable for the development of squalls with wind gusts up to 35 knots and frequent lightning.Thunderstorms this evening may produce strong wind gusts up to 35 knots.
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. Consider delaying or postponing travel in areas under the Squall Watch.
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 12 July 2025 Tonight and Sunday At 6:30 p.m. EDT tonight trough located on a linenortheast-southwest over Georgian Bay.
By 6:30 p.m. EDT Sunday trough located on a line northeast-southwest
over the St. Lawrence River.
At 6:30 p.m. EDT tonight low 1002 mb located over northern Ontario.
By 6:30 p.m. EDT Sunday low 988 mb located over southern Hudson Bay.
At 6:30 p.m. EDT tonight ridge located on a line north-south over
eastern Nebraska.
By 6:30 p.m. EDT Sunday ridge located on a line north-south over
Indiana.
Great Lakes - Lake Huron Area
Another Region
- Date modified: