Southwestern Grand Banks, Canada Marine Forecast, Warnings and Alerts

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Southwestern Grand Banks

Marine Forecast

Issued 03:00 AM NST 21 December 2025

Today Tonight and Monday.

Wind northwest 20 knots diminishing to light this morning then increasing to south 15 to 20 this afternoon. Wind increasing to south 25 this evening then diminishing to northwest 15 near noon Monday.

Showers tonight and Monday.

Winds

Issued 03:00 AM NST 21 December 2025

Today Tonight and Monday. Wind northwest 20 knots diminishing to light this morning then increasing to south 15 to 20 this afternoon. Wind increasing to south 25 this evening then diminishing to northwest 15 near noon Monday.

Waves

Issued 06:00 PM NST 20 December 2025

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

Weather & Visibility

Issued 03:00 AM NST 21 December 2025

Today Tonight and Monday. Showers tonight and Monday.

Ice Forecasts

Southwestern Grand Banks

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

Ice Edge

Ice edge estimated from Newfoundland near 4842N 5305W to 4935N 5326W
to 5012N 5536W to 5125N 5504W to 5349N 5528W to 5633N 6011W to 5928N
6239W to 6200N 5947W then northeastward. Sea ice west of the ice
edge.

Ice Coverage

Ice free.

Ice Forecasts

Tail of the Grand Banks

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

Ice Edge

Ice Coverage

Forecasts available to mariners upon request.

Iceberg Bulletin

Southwestern Grand Banks

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.

Iceberg Bulletin

Tail of the Grand Banks

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

Forecasts available to mariners upon request.

No watches or warnings in effect.

Technical Marine Synopsis

Issued 3:00 AM NST 21 December 2025 Today Tonight and Monday At 3:00 a.m. NST today departing trough located east of the Marine
District.

At 3:00 a.m. NST today low 996 mb located southeast of James Bay.
By 3:00 a.m. NST Monday low 997 mb located over western Belle
Isle Bank.

At 3:00 a.m. NST today ridge located over the Gulf of St. Lawrence.
By 8:00 p.m. NST tonight departing ridge located east of the
Marine District.

Marine Weather Statement

Issued 2:55 AM NST 21 December 2025 A trough of low pressure will continue to pull eastward away from the
marine district this morning. Strong to gale force westerlies behind
the trough will diminish this morning.

A low pressure system southeast of James Bay will quickly track
eastward today to lie over Gulf waters this evening. The low will
then slow as it tracks across Belle Isle Bank overnight and Monday.
Strong to gale force southerlies will spread across the district
ahead of the low then shift to strong to gale force northerlies to
northwesterlies in its wake.

Marine interests are advised that gale warnings are in effect for
Strait of Belle Isle, East Coast, Northeast Coast, Belle Isle Bank,
Funk Island Bank, and Northern Grand Banks.

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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