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Forecast

Marine Forecast

Issued 03:30 PM ADT 15 July 2026

Tonight and Thursday.

Strong wind warning in effect.

Wind westerly 15 knots increasing to southwest 20 to 25 Thursday afternoon then diminishing to west 15 Thursday evening.

Showers Thursday late in the day with a risk of thunderstorms.

Waves

Issued 05:00 PM ADT 15 July 2026
Tonight and Thursday. Seas 1 to 2 metres.

Extended Forecast

Issued 03:30 PM ADT 15 July 2026
Friday Wind westerly 15 to 20 knots increasing to westerly 20 to 25 in the afternoon.
Saturday Wind southwest 10 to 15 knots backing to southerly 15 to 20.
Sunday Wind southwest 25 knots veering to west 15 to 20.

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

Ice Forecasts

Issued 10:00 AM EDT 19 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Lurcher

Issued 3:30 PM ADT 15 July 2026

'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.

Synopsis

Technical Marine Synopsis

Issued 3:30 PM ADT 15 July 2026 Tonight and Thursday At 3:30 p.m. ADT today trough located from Banquereau to East
Scotian Slope.
By 3:00 a.m. ADT Thursday trough located east of the Marine
District.

At 10:00 a.m. ADT Thursday trough located over the St. Lawrence
River.
By 8:00 p.m. ADT Thursday trough located over the southern Marine
District.

Marine Weather Statement

Issued 3:17 PM ADT 15 July 2026 A trough of low pressure from Banquereau to East Scotian Slope will
continue eastward to lie east of the marine district overnight.
Strong to gale force southerly winds ahead of the trough will shift
to moderate to strong westerlies in its wake.

Marine interests are advised that gale warnings are in effect for
Laurentian Fan - southeastern half.

St. Lawrence - St. Lawrence River Area

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