Marine Forecast
Issued 03:00 AM EST 17 December 2025
Today Tonight and Thursday.
Storm warning in effect.
Wind southwest 40 to 50 knots diminishing to southwest 30 to 40
early this morning and to southwest 20 to 30 this afternoon. Wind becoming
northwest 25 to 35 late this evening then diminishing to west 15 to 25
overnight. Wind southwest 15 to 25 Thursday.
Flurries ending near midnight. Visibility as low as 1 mile
in flurries.
High today zero. Low tonight minus 5. High Thursday
plus 3.
Strong wind warning program has ended for the season.
Winds
Issued 03:00 AM EST 17 December 2025
Today Tonight and Thursday.
Storm warning in effect.
Wind southwest 40 to 50 knots diminishing to southwest 30 to 40
early this morning and to southwest 20 to 30 this afternoon. Wind becoming
northwest 25 to 35 late this evening then diminishing to west 15 to 25
overnight. Wind southwest 15 to 25 Thursday.
Strong wind warning program has ended for the season.
Waves
Issued 03:00 AM EST 17 December 2025
Today Tonight and Thursday.
Seas 3 to 4 metres subsiding to 2 to 3 late this morning and to 1
to 2 late this afternoon. Seas subsiding to 1 near midnight.
Weather & Visibility
Issued 03:00 AM EST 17 December 2025
Today Tonight and Thursday.
Flurries ending near midnight. Visibility as low as 1 mile
in flurries.
Air temperature
Issued 03:00 AM EST 17 December 2025
Today Tonight and Thursday.
High today zero. Low tonight minus 5. High Thursday
plus 3.
Ice Forecasts
Issued 10:00 AM EST 17 December 2025 Today Tonight and Thursday Ice Edge
First ice edge estimated from 4723N 6136W to 4738N 6112W to 4744N
6124W to 4734N 6159W to 4706N 6212W to 4706N 6147W to 4723N 6136W.
Sea ice within the ice edge.
Second ice edge estimated from Nova Scotia near 4540N 6136W to
Prince Edward Island near 4621N 6211W. Sea ice west of the ice edge.
Third ice edge estimated from Prince Edward Island near 4628N 6231W
to 4640N 6329W to 4736N 6409W to 4904N 6404W to 4925N 6516W to 4916N
6703W to 4956N 6635W to Anticosti Island near 4924N 6336W. Sea ice
west then north of the ice edge.
Fourth ice edge estimated from Anticosti Island near 4945N 6301W to
4946N 5954W to 5106N 5804W to 5035N 5733W to 4818N 5929W to 4731N
5923W to Newfoundland near 4736N 5740W. Sea ice north then east of
the ice edge.
Ice Coverage
Open water except 5 tenths new ice including 2 tenths grey ice along
parts of the coasts.
Warnings (In effect)
Tadoussac to Pointe à Michel
Issued 06:08 AM EST 17 December 2025'Storm' force winds of 48 to 63 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.
Advisories (In effect)
Marine weather advisory in effect
Tadoussac to Pointe à Michel
Issued 05:47 AM EST 17 December 2025
On Friday, a major low pressure system over the Great Lakes will quickly intensify and move to lie over Labrador on Saturday morning at 960 mb. Overnight Friday night, southerly gales will shift to westerly storm force winds, causing high waves and freezing spray until the end of the day.
Technical Marine Synopsis
Issued 3:00 AM EST 17 December 2025 Today Tonight and Thursday At 3:00 a.m. EST today departing ridge located on a line north-south
over Newfoundland.
At 3:00 a.m. EST today trough located on a line northeast-southwest
over northwestern Québec city.
By 3:00 a.m. EST Thursday departing trough located on a line
north-south over Newfoundland.
At 3:00 p.m. EST today ridge located on a line north-south over
the Great Lakes.
By 7:00 p.m. EST Thursday ridge located on a line
northwest-southeast over the Gulf of St. Lawrence.