Cornwall to Montréal
Forecast
Marine Forecast
Issued 03:00 PM EDT 16 July 2025
Tonight and Thursday.
Strong wind warning in effect.
Wind southwest 10 to 15 knots becoming light this evening then increasing to southwest 15 near noon Thursday. Wind increasing to southwest 20 to 30 Thursday afternoon.
Showers overnight and Thursday with a risk of thunderstorms. Visibility 1 mile or less in showers.
Extended Forecast
Issued 06:00 PM EDT 16 July 2025
Friday
Wind northwest 15 knots backing to southwest 10
to 15 in the afternoon.
Saturday
Wind light becoming southwest 10 to 15
knots.
Sunday
Wind light becoming northwest 10 to 15
knots.
Stay connected
Weather Conditions
Zoom-in to make a selection

Legend:


Ice Conditions
There is no ice forecast issued for this area.
Warnings
Warnings (In effect)
Strong wind warning in effect
Cornwall to Montréal
Issued 10:06 PM EDT 16 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.
Synopsis
Technical Marine Synopsis
Issued 3:00 PM EDT 16 July 2025 Tonight and Thursday At 3:00 p.m. EDT today ridge located on a line northwest-southeastover Havre Saint-Pierre.
By 8:00 p.m. EDT tonight weakening ridge located on a line
northwest-southeast over the Quebec Lower North Shore.
At 3:00 p.m. EDT today warm front from low located on a line
east-west over Lake Superior.
By 8:00 p.m. EDT Thursday low 998 mb located north of Québec city.
Great Lakes - Lake Erie and Lake Ontario Area
Another Region
- Date modified: