Language selection

Weather shortcuts

Grand Manan

Forecast

Marine Forecast

Issued 10:00 AM ADT 18 July 2025

Today Tonight and Saturday.

Strong wind warning in effect.

Wind northwest 15 to 20 knots increasing to northwest 25 near noon then diminishing to northwest 10 to 15 this afternoon. Wind diminishing to light this evening then increasing to southwest 10 to 15 near noon Saturday. Wind increasing to southwest 15 to 20 Saturday evening.

Showers and fog patches ending near noon with a risk of thunderstorms.

Waves

Issued 05:00 AM ADT 18 July 2025
Today Tonight and Saturday. Seas 1 to 2 metres subsiding to 1 or less this evening then building to 1 to 2 Saturday evening.

Extended Forecast

Issued 03:00 AM ADT 18 July 2025
Sunday Wind southwest 15 to 20 knots.
Monday Wind northwest 15 knots.
Tuesday Wind northwest 15 knots backing to southwest 15.

Stay connected

ATOM

Weather Conditions

Skip Image

Zoom-in to make a selection

Map of St. Lawrence - St. Lawrence River marine weather areas Cap-Chat Mont-Joli Airport Bathurst Airport Île Bicquette Charlo Port Menier Miramichi Pointe-au-Père Fundy Park (Alma) New Carlisle Grand Manan Bas Caraquet CFB Bagotville Jonquière Mistook Normandin Roberval Airport Deschambault Beauport North Bay Airport Trois-Rivières Airport Lake Nipissing - 45152 Kouchibouguac Baie-Comeau Airport Île d'Orléans Saint-Anicet Sainte-Anne-de-Bellevue Cap-Rouge Lac Memphrémagog Saint-Hubert Airport Montréal-Trudeau Int'l Airport Île Rouge Lac Saint-Pierre L'Isle-aux-Grues L'Assomption Pointe de l'Islet Pointe Claveau Sept-Îles Airport Pointe-des-Monts North Cape Pointe-Noire Yarmouth Airport Cap-d'Espoir Brier Island Rivière-la-Madeleine St. Stephen Gaspé Airport Saint John Airport Point Lepreau Greater Moncton Roméo LeBlanc Int'l Airport Miscou Island Kouchibouguac La Pocatière
Legend:
buoy Buoy
land station Land Station
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 10:00 AM ADT 18 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 10:00 AM ADT 18 July 2025 Today Tonight and Saturday At 10:00 a.m. ADT today low 994 mb located north of Anticosti
Island.
By 10:00 a.m. ADT Saturday low 983 mb located over Labrador Sea.

At 8:00 p.m. ADT tonight ridge located west of the Marine District.
By 10:00 a.m. ADT Saturday ridge located over the southern Marine
District.

Marine Weather Statement

Issued 9:47 AM ADT 18 July 2025 A low pressure system north of Anticosti will intensify as is tracks
northeastward today to lie over the Labrador Sea Saturday morning.
Strong southerly winds will veer to strong to gale force westerlies
today in the wake of the system before diminishing tonight.

Marine interests are advised that gale warnings are in effect for
Chaleur - Miscou, Gulf - Magdalen and Anticosti.

St. Lawrence - St. Lawrence River Area

Another Region

Date modified: