Marine Forecast

Issued 03:30 PM ADT 29 August 2016

Tonight and Tuesday

Strong wind warning in effect.

Wind southwest 20 knots veering to northwest 15 to 20 early this evening then diminishing to northwest 10 to 15 late overnight. Wind diminishing to light Tuesday morning then becoming southwest 10 to 15 Tuesday afternoon.

Chance of showers late this afternoon with a risk of thunderstorms. Fog patches dissipating early this evening.


Issued 05:00 PM ADT 29 August 2016
Tonight and Tuesday Seas 1 metre.

Extended Forecast

Issued 03:30 PM ADT 29 August 2016
Wednesday Wind southwest 15 to 20 knots.
Thursday Wind light becoming northerly 15 knots late in the day.
Friday Wind northeasterly 15 to 20 knots.

Stay connected


Weather Conditions

Skip Image

Zoom-in to make a selection

Map of St. Lawrence - St. Lawrence River marine weather areas Mont-Louis - 45138 Lake Nipissing - 45152 North Bay Airport Beauport Deschambault L'Assomption Trois-Rivières Airport Saint-Hubert Airport Baie-Comeau Airport Cap-Rouge Pointe de l'Islet Sept-Îles Airport Cap-d'Espoir Rivière-la-Madeleine Gaspé Airport La Pocatière Mont-Joli Airport New Carlisle Pointe-au-Père Port Menier CFB Bagotville Jonquière Mistook Normandin Roberval Airport Bas Caraquet Bathurst Airport Bouctouche AAFC Charlo Miramichi Fundy Park (Alma) Grand Manan Kouchibouguac Miscou Island Greater Moncton Int'l Airport Point Lepreau Saint John Airport St. Stephen Brier Island Yarmouth Airport North Cape Île d'Orléans Île aux-Grues Lac Saint-Pierre Varennes Lac Memphremagog Sainte-Anne-de-Bellevue Saint-Anicet Île Rouge Pointe Claveau Pointe-des-Monts Pointe-Noire Île Bicquette Cap-Chat Montréal-Trudeau Int'l Airport
buoy Buoy
land station Land Station
Ice Conditions

Ice Forecasts

Issued 10:00 AM EDT 25 May 2016 Forecasts have ended for the season.

Warnings (In effect)

Strong wind warning in effect


Issued 3:30 PM ADT 29 August 2016

'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.


Technical Marine Synopsis

Issued 3:30 PM ADT 29 August 2016 Tonight and Tuesday At 3:30 p.m. ADT today low 1004 mb located north of Anticosti
By 3:00 a.m. ADT Tuesday deepening low 996 mb located over

At 3:30 p.m. ADT today intensifying tropical depression 8 1011 mb
located at 33.4N 73.7W.
By 10:00 a.m. ADT Tuesday tropical depression 8 1010 mb located
at 34.4N 75.0W.

At 3:30 p.m. ADT today Hurricane Gaston 960 mb located at 31.0N
By 10:00 a.m. ADT Tuesday Hurricane Gaston 965 mb located at
31.9N 53.7W.

Marine Weather Statement

Issued 3:25 PM ADT 29 August 2016 An intensifying low pressure system north of Anticosti Island will
continue to cross the Gulf of St. Lawrence today. This will give
strong to gale force south to southwest winds ahead of the low,
shifting to strong to gale force northwesterlies in its wake.

Marine interests are advised that gale warnings are in effect for
Banquereau, Cabot Strait, Gulf Magdalen, and Anticosti.

As of 3:00 PM ADT, hurricane Gaston is located near 31.0 degrees
north and 55.3 degrees west. Maximum sustained winds are 95 knots.
Minimum central pressure is about 963 MB. Gaston is moving north at 2

Note that Gaston is forecast to pass well south of Canadian waters.

As of 3:00 PM ADT tropical depression 8 is located near 33.4 degrees
north and 73.7 degrees west. Maximum sustained winds are 30 knots.
Minimum central pressure is about 1011 MB. It is currently moving
northwest at 6 knots.

The depression could become a tropical storm tonight. There is
uncertainty about the development of the storm, and whether it will
have any effect on Canadian waters. There are some indications it may
dissipate before reaching our waters.

St. Lawrence - St. Lawrence River Area

Another Region

What we are doing


Follow us on Twitter!

Get timely local #weather alerts directly to your Twitter feed

Be Air Aware

Air Quality Health Index

Get your weather, plan your day.

Extreme Heat Protection

Date modified: