Language selection

Government of Canada / Gouvernement du Canada

Search

Weather shortcuts

Trois-Rivières to Donnacona

Warnings

Forecast

Marine Forecast

Issued 10:12 AM EDT 18 June 2026

Today Tonight and Friday.

Strong wind warning in effect.

Wind easterly 10 to 15 knots increasing to northeast 15 to 25 early this afternoon with gusts to 50 near thunderstorms. Wind diminishing to light this evening then increasing to southwest 15 to 25 late overnight. Wind becoming west 15 near noon Friday then diminishing to light Friday evening.

Rain changing to showers this afternoon. Risk of thunderstorms this afternoon and this evening. Visibility 1 mile or less in precipitation.

Extended Forecast

Issued 06:00 AM EDT 18 June 2026
Saturday Wind west 15 to 25 knots diminishing to westerly 10 to 15 in the afternoon.
Sunday Wind light.
Monday Wind light becoming southwest 10 to 15 knots.

Stay connected

ATOM

List of Official Text Forecasts
Resources

Weather Conditions

Skip Image

Zoom-in to make a selection

Map of St. Lawrence - St. Lawrence River marine weather areas Miramichi North Cape Port Menier Roberval Airport Normandin Mistook Jonquière CFB Bagotville Cap-Chat Île Bicquette Charlo North Bay Airport Yarmouth Airport Brier Island St. Stephen Saint John Airport Point Lepreau Greater Moncton Roméo LeBlanc Int'l Airport Miscou Island Kouchibouguac Kouchibouguac Grand Manan Fundy Park (Alma) Bas Caraquet Bathurst Airport Lac Saint-Pierre Pointe-Noire Île-d'Orléans - Quai de St-Jean Pointe-des-Monts L'Assomption Sept-Îles Airport Pointe Claveau Pointe de l'Islet Trois-Rivières Airport L'Isle-aux-Grues Deschambault Île Rouge Montréal-Trudeau Int'l Airport Montréal Metropolitain Airport Lac Memphrémagog Sainte-Anne-de-Bellevue Cap-Rouge Saint-Anicet Baie-Comeau Airport La Pocatière Pointe-au-Père New Carlisle Mont-Joli Airport Gaspé Airport Lake Nipissing - 45152 Rivière-la-Madeleine Beauport Cap-d'Espoir
Legend:
buoy Buoy
land station Land Station
Ice Conditions

There is no ice forecast issued for this area.

Warnings

Warnings (In effect)

Strong wind warning in effect

Trois-Rivières to Donnacona

Issued 10:12 AM EDT 18 June 2026

'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.

Watches (In effect)

Squall watch in effect

Trois-Rivières to Donnacona

Issued 09:41 AM EDT 18 June 2026 This afternoon and this evening, conditions will be favourable for the development of squalls with wind gusts up to 50 knots, frequent lightning strikes and poor to very poor visibilities caused by thunderstorms at times strong.

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 3:00 AM EDT 18 June 2026 Today Tonight and Friday At 3:00 a.m. EDT today ridge located over western Newfoundland.
By 8:00 p.m. EDT tonight departing ridge located over eastern
Newfoundland.

At 3:00 a.m. EDT today low 992 mb located over Lake Michigan.
By 8:00 p.m. EDT Friday low 994 mb located northeast of New
Brunswick.

St. Lawrence - St. Lawrence River 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.

Features

Colour-coded weather alerts

Learn more about weather alerting in Canada

Thunderstorm Outlooks

Find the Thunderstorm Outlook for your area.

Feedbackabout this web site
Date modified: