Northumberland Strait
Forecast
Marine Forecast
Issued 08:00 PM ADT 16 July 2025
Tonight and Thursday.
Wind southerly 10 to 15 knots except light over eastern sections. Wind becoming southwesterly 10 to 15 near midnight then increasing to south 15 to 20 early Thursday evening.
Extended Forecast
Issued 03:30 PM ADT 16 July 2025
Friday
Wind southerly 20 to 25 knots becoming
northwest 25 in the afternoon.
Saturday
Wind northwest 15 to 20 knots backing to
southwest 15 to 20.
Sunday
Wind southwest 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
No watches or warnings in effect.
Synopsis
Technical Marine Synopsis
Issued 8:00 PM ADT 16 July 2025 Tonight and Thursday At 8:00 p.m. ADT tonight low 1009 mb located over the St. LawrenceRiver.
By 10:00 a.m. ADT Thursday weakening low 1011 mb located northeast
of the Marine District.
At 10:00 a.m. ADT Thursday low 1004 mb located near the Great Lakes.
By 8:00 p.m. ADT Thursday low 1000 mb located near the St. Lawrence
River.
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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