Marine Forecast
Issued 03:00 AM NST 18 December 2025
Today Tonight and Friday.
Gale warning in effect.
Wind northwest 25 knots increasing to northwest 25 to 35 this
morning then becoming west 25 this afternoon. Wind backing to southwest 15 to 20
this evening then increasing to southwest 25 overnight. Wind increasing to
southwest 35 Friday morning then backing to south 45 Friday
evening.
Flurries ending near midnight. Showers
Friday.
Freezing spray warning in effect.
Freezing spray over northern sections today and early this
evening.
Temperatures plus 1 falling to minus 7 to minus 1 this morning
then rising to plus 3 near midnight.
Winds
Issued 03:00 AM NST 18 December 2025
Today Tonight and Friday.
Gale warning in effect.
Wind northwest 25 knots increasing to northwest 25 to 35 this
morning then becoming west 25 this afternoon. Wind backing to southwest 15 to 20
this evening then increasing to southwest 25 overnight. Wind increasing to
southwest 35 Friday morning then backing to south 45 Friday
evening.
Waves
Issued 06:00 AM NST 18 December 2025
Today Tonight and Friday.
Seas 2 to 3 metres except 3 to 4 over southern sections today.
Seas building to 3 to 5 Friday morning.
Weather & Visibility
Issued 03:00 AM NST 18 December 2025
Today Tonight and Friday.
Flurries ending near midnight. Showers
Friday.
Air temperature
Issued 03:00 AM NST 18 December 2025
Today Tonight and Friday.
Temperatures plus 1 falling to minus 7 to minus 1 this morning
then rising to plus 3 near midnight.
Freezing Spray
Issued 03:00 AM NST 18 December 2025
Today Tonight and Friday.
Freezing spray warning in effect.
Freezing spray over northern sections today and early this
evening.
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
Bergy water except consolidated grey ice along parts of the coasts.
Iceberg Bulletin
Issued 1:30 PM EST 17 December 2025 Iceberg Limit
Iceberg limit at 0000 UTC 18 Dec estimated from Newfoundland near
5020N 5628W to 5030N 5500W to 5330N 5200W to 5945N 5730W to 6155N
5330W to 6005N 4945W to 5900N 4600W then northeastward.Iceberg Count
No confirmed icebergs.
Warnings (In effect)
Gulf - Port au Port
Issued 03:00 AM NST 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.
Gulf - Port au Port
Issued 03:00 AM NST 18 December 2025Moderate or severe freezing spray is 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 3:00 AM NST 18 December 2025 Today Tonight and Friday At 3:00 a.m. NST today trough located on a line northeast-southwest
over the West Coast of Newfoundland.
By 3:00 a.m. NST Friday trough located east of the Marine District.
At 3:00 a.m. NST Friday approaching trough located over Quebec.
At 3:00 a.m. NST today ridge located on a line north-south over
Quebec.
By 8:30 p.m. NST Friday ridge located on a line northwest-southeast
over the Northeast Coast of Newfoundland.
Marine Weather Statement
Issued 2:56 AM NST 18 December 2025 A trough of low pressure currently over the west coast of
Newfoundland will cross the marine district today. Strong to gale
force southwesterlies ahead of the trough will shift to strong to
gale force northwesterlies in its wake today. Winds are expected to
diminish tonight as the trough departs.
A second trough of low pressure will approach from the west on
Friday. Strong to gale force southwesterlies are expected to spread
across the marine district on Friday ahead of the trough.
Marine interests are advised that gale warnings are in effect for all
waters.
Marine interests are also advised that freezing spray warnings are in
effect for Strait of Belle Isle, Gulf waters, Northeast Coast, Belle
Isle Bank, and Funk Island Bank.