Language selection

Government of Canada / Gouvernement du Canada

Search

Weather shortcuts

Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 12:45 PM EDT 22 March 2025

Today Tonight and Sunday.

Wind southwest 20 to 30 knots veering to northwest 20 to 30 late this afternoon then diminishing to west 10 to 20 late overnight. Wind becoming light Sunday morning.

Showers this afternoon.

High today plus 9. Low tonight minus 10. High Sunday minus 2.

Extended Forecast

Issued 06:00 AM EDT 22 March 2025
Monday Wind northeast 15 to 25 knots.
Tuesday Wind southwest 10 to 15 knots increasing to southwest 15 to 25.
Wednesday Wind southwest 10 to 15 knots becoming northeast 10 to 15.

Stay connected

ATOM

List of Official Text Forecasts
Resources

Weather Conditions

Skip Image

Zoom-in to make a selection

Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Great Duck Island Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Cove Island Goderich Sarnia Chris Hadfield Airport Tobermory Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal Vineland Station Welland-Pelham Windsor Airport Port Colborne Erieau Point Pelee Burlington Lift Bridge Cobourg Hamilton Munro Int'l Airport Oshawa Executive Airport Point Petre Toronto City Centre Airport CFB Trenton Peterborough Municipal Airport
Legend:
buoy Buoy
land station Land Station
Ice Conditions

There is no ice forecast issued for this area.

Warnings

Watches (In effect)

Squall watch in effect

Cornwall to Montréal

Issued 12:52 PM EDT 22 March 2025 The passage of a vigorous cold front late this afternoon or early this evening could cause squalls to develop with wind gusts near 35 knots.

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 22 March 2025 Today Tonight and Sunday At 3:00 a.m. EDT today low 987 mb located over Prince Edward Island.
By 8:00 p.m. EDT Sunday low 978 mb located over Labrador Sea.

At 3:00 a.m. EDT today dissipating ridge located on a line
north-south over Saguenay River.

At 3:00 a.m. EDT today trough located on a line northeast-southwest
over Lake Huron.
By 8:00 p.m. EDT Sunday trough located on a line north-south over
Cape Breton Island.

Great Lakes - Lake Erie and Lake Ontario Area

Another Region

Marine Weather for Canada

Weather shortcuts


How to use
  • Add to shortcuts
    • Go to the desired page on the site, open the Weather shortcuts menu and click on the "Add to shortcuts" button
    • Page name will display in the "Add this page" window, the name can be changed by highlighting the text and entering the desired name
    • Click on the "Save" button to add the link to the list
    • Click on the "X" button to close the panel
  • Delete a link
    • Click on the "Organize shortcuts" button
    • Select the link to delete
    • Click on the "Delete" button to remove the link from the list
    • Click on the "Close" button to save the change
  • Move a link up/down the list
    • Click on the "Organize shortcuts" button
    • Click and hold the link and move to new location in the list
    • Click on the "Close" button to save the change
  • Rename a link
    • Click on the "Organize shortcuts" button
    • Select the link to rename
    • Click on the "Rename" button and change the link name
    • Click the enter or tab key
    • Click on the "Close" button to save the change
  • Keyboard navigation
    • Use the Tab key to move to a button or link
    • Use the Enter key to click on buttons or links
    • Organize shortcuts navigation
      • Use the ↑ Up key to select the link above. If none are selected, it will select the first link.
      • Use the ↓ Down key to select the link below. If none are selected, it will select the last link.
      • Use the Page Up key to move a selection up in the list.
      • Use the Page Down key to move a selection down in the list.
  • Restore default list

    Warning: Clicking on the button below will remove all your customized links.

Customized Weather shortcuts

Save your customized list as a bookmark.

Copy/paste or click on the link below then when the page displays, you can bookmark the page using the web browser. Bookmarking your customized list will allow you to access it even if the local storage on your device is erased.

Feedbackabout this web site
Date modified: