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Donnacona to Beauport

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 18 July 2026

Tonight and Sunday.

Strong wind warning in effect.

Wind light increasing to southwest 10 to 15 knots this evening and to northwest 15 to 25 late overnight. Wind becoming northwest 15 Sunday evening.

Showers ending Sunday morning with a risk of thunderstorms. Visibility as low as 1 mile in showers.

Extended Forecast

Issued 06:00 PM EDT 18 July 2026
Monday Wind southwest 10 to 15 knots.
Tuesday Wind southwest 10 to 15 knots increasing to southerly 15 to 25.
Wednesday Wind south 15 knots increasing to southwest 15 to 25 late in the day.

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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

There is no ice forecast issued for this area.

Warnings

Warnings (In effect)

Strong wind warning in effect

Donnacona to Beauport

Issued 3:00 PM EDT 18 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.

Warnings (Ended)

Squall warning ended

Donnacona to Beauport

Issued 7:24 PM EDT 18 July 2026
Synopsis

Technical Marine Synopsis

Issued 3:00 PM EDT 18 July 2026 Tonight and Sunday At 3:00 p.m. EDT today ridge located on a line northwest-southeast
over Anticosti Island.
By 8:00 a.m. EDT Sunday dissipating ridge located on a line
northwest-southeast over the Strait of Belle Isle.

At 3:00 p.m. EDT today low 998 mb located northwest of Montréal.
By 8:00 p.m. EDT Sunday low 986 mb located over western Anticosti
Island.

At 8:00 p.m. EDT tonight ridge located on a line north-south over
Lake Superior.
By 8:00 p.m. EDT Sunday ridge located on a line north-south over
Lake Huron.

St. Lawrence - St. Lawrence River Area

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