Gulf - Port au Port, Canada Marine Forecast, Warnings and Alerts

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Gulf - Port au Port

Marine Forecast

Issued 03:30 PM NST 20 December 2025

Tonight and Sunday.

Storm warning in effect.

Wind west 50 knots diminishing to northwest 45 this evening and to northwest 25 late overnight. Wind backing to southwest 15 to 20 Sunday morning then increasing to southwest 25 Sunday afternoon. Wind veering to west 15 to 20 Sunday evening.

Flurries ending overnight. Periods of snow Sunday morning and afternoon changing to periods of rain or snow. Visibility 1 mile or less in flurries.

Freezing spray warning in effect.

Freezing spray over northern sections late this afternoon tonight and Sunday morning.

Temperatures minus 7 to minus 2 rising to minus 2 to plus 2 Sunday afternoon.

Winds

Issued 03:30 PM NST 20 December 2025

Tonight and Sunday. Storm warning in effect. Wind west 50 knots diminishing to northwest 45 this evening and to northwest 25 late overnight. Wind backing to southwest 15 to 20 Sunday morning then increasing to southwest 25 Sunday afternoon. Wind veering to west 15 to 20 Sunday evening.

Waves

Issued 06:00 PM NST 20 December 2025

Tonight and Sunday. Seas 5 to 7 metres subsiding to 3 to 5 late overnight and to 2 to 3 Sunday morning.

Weather & Visibility

Issued 03:30 PM NST 20 December 2025

Tonight and Sunday. Flurries ending overnight. Periods of snow Sunday morning and afternoon changing to periods of rain or snow. Visibility 1 mile or less in flurries.

Air temperature

Issued 03:30 PM NST 20 December 2025

Tonight and Sunday. Temperatures minus 7 to minus 2 rising to minus 2 to plus 2 Sunday afternoon.

Freezing Spray

Issued 03:30 PM NST 20 December 2025

Tonight and Sunday. Freezing spray warning in effect. Freezing spray over northern sections late this afternoon tonight and Sunday morning.

Ice Forecasts

Issued 10:00 AM EST 20 December 2025 Today Tonight and Sunday

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 1 tenth grey ice along parts of the coasts.

Iceberg Bulletin

Issued 1:30 PM EST 20 December 2025

Iceberg Limit

Iceberg limit at 0000 UTC 21 Dec estimated from Newfoundland near
5020N 5628W to 5100N 5345W to 5330N 5145W to 5945N 5730W to 6155N
5330W to 6005N 4945W to 5900N 4500W then northeastward.

Iceberg Count

No confirmed icebergs.

Warnings (In effect)

Storm warning in effect

Gulf - Port au Port

Issued 3:30 PM NST 20 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.

Freezing spray warning in effect

Gulf - Port au Port

Issued 3:30 PM NST 20 December 2025

Moderate 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 3:30 PM NST 20 December 2025 Tonight and Sunday At 3:30 p.m. NST today low 946 mb located off Labrador Coast.
By 3:30 p.m. NST Sunday low 964 mb located north of Labrador Sea.

At 3:30 p.m. NST today trough from 946 mb low located on a line
north-south over the West Coast of Newfoundland.
By 3:00 a.m. NST Sunday departing trough from low located north
of the Marine District.

At 8:00 p.m. NST tonight ridge located over the Maritimes.
By 10:00 a.m. NST Sunday ridge located over the southern Grand
Banks.

Marine Weather Statement

Issued 3:31 PM NST 20 December 2025 A trough of low pressure associated with an intense low over the
Labrador Sea will continue to cross the district tonight. Strong to
gale force southerlies to southwesterlies will increase to gale to
storm force southerlies ahead of the trough. Winds will shift to gale
to storm force westerlies in its wake and then diminish to moderate
to strong west to southwesterlies as it departs.

Marine interests are advised that storm warnings are in effect
Gulf-Port au Port, Belle Isle Bank, Funk Island Bank, and Northern
Grand Banks. Gale warnings are in effect for all remaining waters.

Marine interests are also advised that freezing spray warnings are in
effect for Strait of Belle Isle, Gulf waters, Northeast Coast, and
Belle Isle Bank.

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