Marine Forecast
Issued 03:00 AM EST 18 December 2025
Today Tonight and Friday.
Gale warning in effect.
Wind west 20 knots diminishing to variable 15 early this evening
then becoming southwest 15 near midnight. Wind increasing to east 20 Friday
morning and to southeast 25 to 35 Friday afternoon.
Rain Friday afternoon and evening.
Risk of freezing spray this morning.
Temperatures minus 5 rising to plus 7 Friday
evening.
Strong wind warning program has ended for the season.
Winds
Issued 03:00 AM EST 18 December 2025
Today Tonight and Friday.
Gale warning in effect.
Wind west 20 knots diminishing to variable 15 early this evening
then becoming southwest 15 near midnight. Wind increasing to east 20 Friday
morning and to southeast 25 to 35 Friday afternoon.
Strong wind warning program has ended for the season.
Waves
Issued 03:00 AM EST 18 December 2025
Today Tonight and Friday.
Seas 1 to 2 metres subsiding to 1 or less this evening then
building to 2 to 3 Friday evening.
Weather & Visibility
Issued 03:00 AM EST 18 December 2025
Today Tonight and Friday.
Rain Friday afternoon and evening.
Air temperature
Issued 03:00 AM EST 18 December 2025
Today Tonight and Friday.
Temperatures minus 5 rising to plus 7 Friday
evening.
Freezing Spray
Issued 03:00 AM EST 18 December 2025
Today Tonight and Friday.
Risk of freezing spray this morning.
Ice Forecasts
Issued 10:00 AM EST 18 December 2025 Today Tonight and Friday 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 3 tenths new ice including 1 tenth grey ice along
parts of the coasts.
Warnings (In effect)
Pointe-des-Monts to Anticosti - northern half
Issued 03:00 AM EST 18 December 2025'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. 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 3:00 AM EST 18 December 2025 Today Tonight and Friday At 3:00 a.m. EST today ridge located on a line north-south over
Trois-Rivières.
By 7:00 p.m. EST tonight departing ridge located on a line
northwest-southeast over the Gulf of St. Lawrence.
At 7:00 p.m. EST tonight low 989 mb located over Lake Superior.
By 7:00 p.m. EST Friday low 972 mb located north of Lake Saint-Jean.