Northumberland Strait
Forecast
Marine Forecast
Issued 03:00 AM ADT 17 July 2025
Today Tonight and Friday.
Strong wind warning in effect.
Wind southwesterly 10 to 15 knots increasing to south 15 to 20 early this evening and to south 20 to 25 near midnight. Wind veering to westerly 20 to 25 Friday afternoon then diminishing to northwest 10 to 15 Friday evening.
Rain overnight and Friday with a risk of thunderstorms.
Extended Forecast
Issued 03:00 AM ADT 17 July 2025
Saturday
Wind northwest 15 to 20 knots backing to
southwest 15 to 20 in the afternoon.
Sunday
Wind southwest 15 to 20 knots diminishing to
light.
Monday
Wind northerly 15 to 20 knots.
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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 03:00 AM ADT 17 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 AM ADT 17 July 2025 Today Tonight and Friday At 3:00 a.m. ADT today dissipating trough located over the Gulfof St. Lawrence.
At 10:00 a.m. ADT today low 1003 mb located near the Great Lakes.
By 8:00 p.m. ADT Friday trough from 992 mb low located from
Newfoundland to East Scotian Slope.
Marine Weather Statement
Issued 2:38 AM ADT 17 July 2025 An intensifying low pressure system approaching from the west andmoving northeast through the Gulf of St. Lawrence will give strong to
gale force winds to much of the district.
A gale warning is in effect for Anticosti - southern half. Strong
wind warnings are in effect for Fundy, Grand Manan, Lurcher,
southwestern shore, eastern shore, Fourchu, Cabot Strait and all Gulf
of St. Lawrence waters.
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
- 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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