Grand Manan
Forecast
Marine Forecast
Issued 03:00 AM ADT 21 June 2025
Today Tonight and Sunday.
Strong wind warning in effect.
Wind west 10 to 15 knots backing to southwest 15 overnight then increasing to southerly 25 Sunday morning. Wind diminishing to west 15 Sunday evening.
Scattered showers Sunday afternoon and evening. Fog patches forming Sunday afternoon.
Waves
Issued 05:00 PM ADT 20 June 2025
Tonight and Saturday.
Seas 1 to 2 metres subsiding to 1 early Saturday
morning.
Extended Forecast
Issued 03:00 AM ADT 21 June 2025
Monday
Wind light.
Tuesday
Wind southwest 15 to 20 knots.
Wednesday
Wind northwest 15 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
Grand Manan
Issued 03:00 AM 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 3:00 AM ADT 21 June 2025 Today Tonight and Sunday At 3:00 a.m. ADT today low 993 mb located over eastern AnticostiIsland.
By 3:00 a.m. ADT Sunday departing low 996 mb located over Labrador
Sea.
At 3:30 p.m. ADT today ridge located over Quebec.
By 3:00 a.m. ADT Sunday ridge located from Labrador to Georges Bank.
At 3:00 a.m. ADT Sunday approaching low 1000 mb located over
southern Quebec.
Marine Weather Statement
Issued 2:50 AM ADT 21 June 2025 A low pressure system over Eastern Anticosti will continue to movenortheast to lie over the Labrador Sea by tonight. Strong to gale
force west to northwest winds will diminish through the day today.
Marine interests are advised that gale warnings are in effect for
Cabot Strait - northern half, Gulf - Magdalen and Anticosti.
St. Lawrence - St. Lawrence River Area
- Anticosti - eastern half
- Anticosti - western 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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