Donnacona to Beauport
Forecast
Marine Forecast
Issued 05:47 AM EDT 17 July 2025
Today Tonight and Friday.
Wind light becoming northeast 10 to 15 knots this morning with gusts to 50 near thunderstorms today. Wind becoming light early this evening with gusts to 50 near thunderstorms. Wind becoming westerly 15 near midnight. Wind westerly 15 Friday.
Showers ending near midnight with a risk of thunderstorms. Visibility 1 mile or less in showers.
Extended Forecast
Issued 06:00 AM EDT 17 July 2025
Saturday
Wind southwest 10 to 15 knots increasing to
southwest 15 to 20 in the morning.
Sunday
Wind southwest 10 to 15 knots veering to
northwest 10 to 15.
Monday
Wind northwest 10 to 15 knots.
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Weather Conditions
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Ice Conditions
There is no ice forecast issued for this area.
Warnings
Watches (In effect)
Squall watch in effect
Donnacona to Beauport
Issued 11:07 AM EDT 17 July 2025 This afternoon and this evening, conditions will be favourable for the development of squalls with wind gusts up to 50 knots and frequent lightning.Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway.
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 17 July 2025 Today Tonight and Friday At 3:00 a.m. EDT today low 1004 mb located over Lake Huron.By 8:00 p.m. EDT Friday low 988 mb located over Labrador.
At 3:00 a.m. EDT today high located south of Manitoba.
By 8:00 p.m. EDT Friday high located over Lake Ontario.
St. Lawrence - St. Lawrence River Area
- Anticosti - northern half
- Anticosti - southern half
- Beauport to L'Isle-aux-Coudres
- Browns Bank
- Chaleur - Miscou - eastern half
- Chaleur - Miscou - western half
- Cornwall to Montréal
- Donnacona to Beauport
- Fundy
- Grand Manan
- Gulf - Magdalen
- Lake Memphrémagog - northern half
- Lake Nipissing
- Lake Saint-Jean
- Lurcher
- L'Isle-aux-Coudres to Tadoussac
- Montréal to Trois-Rivières
- Northumberland Strait
- Pointe à Michel to Pointe-des-Monts
- Pointe-des-Monts to Anticosti - northern half
- Pointe-des-Monts to Anticosti - southern half
- Prescott to Cornwall
- Richelieu River and Northern Lake Champlain
- Saguenay to Tadoussac
- Tadoussac to Pointe à Michel
- Trois-Rivières to Donnacona
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