Northumberland Strait
Forecast
Marine Forecast
Issued 08:00 PM ADT 21 June 2025
Tonight and Sunday.
Strong wind warning in effect.
Wind northwest 15 knots diminishing to light this evening then increasing to south 15 to 20 near noon Sunday. Wind diminishing to south 10 to 15 early Sunday evening except south 20 over eastern sections.
Periods of rain Sunday afternoon and evening. Fog patches forming Sunday evening.
Extended Forecast
Issued 03:30 PM ADT 21 June 2025
Monday
Wind variable 10 to 15 knots.
Tuesday
Wind southwesterly 15 to 20 knots.
Wednesday
Wind southwesterly 15 to 20 knots veering to
northwest 20.
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Weather Conditions
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Ice Conditions
Ice Forecasts
Issued 10:00 AM EDT 26 May 2025 Forecasts have ended for the season.Warnings
Warnings (In effect)
Strong wind warning in effect
Northumberland Strait
Issued 8:00 PM ADT 21 June 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 8:00 PM ADT 21 June 2025 Tonight and Sunday At 8:00 p.m. ADT tonight ridge located from Georges Bank toAnticosti Island.
By 3:30 p.m. ADT Sunday departing ridge located over Newfoundland.
At 8:00 p.m. ADT tonight low 998 mb located south of James Bay.
By 8:00 p.m. ADT Sunday weakening low 1011 mb located over Grand
Manan.
Marine Weather Statement
Issued 6:35 PM ADT 21 June 2025 Marine interests are advised that all gale warnings have ended.
St. Lawrence - St. Lawrence River Area
- Anticosti - northeastern half
- Anticosti - southwestern 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 - northeastern half
- Gulf - Magdalen - southwestern half
- Kingston to Cornwall
- 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
- Richelieu River and Northern Lake Champlain
- Saguenay to Tadoussac
- Tadoussac to Pointe à Michel
- Trois-Rivières to Donnacona
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