Northumberland Strait - western half
Forecast
Marine Forecast
Issued 10:00 AM ADT 23 June 2025
Today Tonight and Tuesday.
Strong wind warning in effect.
Wind light increasing to southeast 15 knots early this evening and to southerly 20 near midnight. Wind veering to southwest 15 to 20 Tuesday morning then to westerly 15 to 20 Tuesday evening.
Showers overnight and Tuesday morning with a risk of thunderstorms. Showers Tuesday late in the day. Fog patches.
Extended Forecast
Issued 03:00 AM ADT 23 June 2025
Wednesday
Wind northwest 20 to 25 knots diminishing to
northwest 15 in the afternoon.
Thursday
Wind variable 10 to 15 knots.
Friday
Wind northwest 10 to 15 knots diminishing to
light.
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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 - western half
Issued 10:00 AM ADT 23 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 10:00 AM ADT 23 June 2025 Today Tonight and Tuesday At 10:00 a.m. ADT today trough located from the Gulf of St. Lawrenceto Georges Bank.
By 8:00 p.m. ADT tonight weakening trough located from Newfoundland
to Laurentian Fan.
At 8:00 p.m. ADT tonight trough located near the Great Lakes.
By 8:00 p.m. ADT Tuesday trough from 998 mb low located over
Labrador to Cape Cod.
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 - western 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 - western half
- 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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