Southwestern Grand Banks, Canada Marine Forecast, Warnings and Alerts

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Southwestern Grand Banks

Marine Forecast

Issued 10:00 AM NST 04 November 2025

Today Tonight and Wednesday.

Hurricane force wind warning in effect.

Wind southeast 25 to 35 knots increasing to southeast 50 to 60 near noon then veering to southwest 50 to 60 this afternoon. Wind veering to west 50 to 60 early this evening except southwest 65 to 75 over northwestern sections this evening. Wind becoming northwest 40 to 50 Wednesday morning.

Rain and fog patches with a risk of thunderstorms changing to showers this evening.

Winds

Issued 10:00 AM NST 04 November 2025

Today Tonight and Wednesday. Hurricane force wind warning in effect. Wind southeast 25 to 35 knots increasing to southeast 50 to 60 near noon then veering to southwest 50 to 60 this afternoon. Wind veering to west 50 to 60 early this evening except southwest 65 to 75 over northwestern sections this evening. Wind becoming northwest 40 to 50 Wednesday morning.

Waves

Issued 06:00 AM NST 04 November 2025

Today Tonight and Wednesday. Seas 2 to 3 metres building to 3 to 5 this morning and to 6 to 8 near noon. Seas building to 9 to 12 early this evening then subsiding to 7 to 9 late overnight.

Weather & Visibility

Issued 10:00 AM NST 04 November 2025

Today Tonight and Wednesday. Rain and fog patches with a risk of thunderstorms changing to showers this evening.

Ice Forecasts

Southwestern Grand Banks

Issued 10:00 AM EDT 23 July 2025 Forecasts have ended for the season.

Ice Forecasts

Tail of the Grand Banks

Issued 10:00 AM EDT 23 July 2025 Forecasts have ended for the season.

Iceberg Bulletin

Southwestern Grand Banks

Issued 1:30 PM EST 3 November 2025

Iceberg Limit

Iceberg limit at 0000 UTC 4 Nov estimated from Newfoundland near
5026N 5623W to 5000N 4930W to 5045N 4830W to 5245N 4830W to 5945N
5645W to 6055N 5125W to 5900N 4720W then eastward.

Iceberg Count

No confirmed icebergs.

Iceberg Bulletin

Tail of the Grand Banks

Issued 1:30 PM EST 3 November 2025

Iceberg Limit

Iceberg limit at 0000 UTC 4 Nov estimated from Newfoundland near
5026N 5623W to 5000N 4930W to 5045N 4830W to 5245N 4830W to 5945N
5645W to 6055N 5125W to 5900N 4720W then eastward.

Iceberg Count

Forecasts available to mariners upon request.

Warnings (In effect)

Hurricane force wind warning in effect

Southwestern Grand Banks

Issued 10:00 AM NST 04 November 2025

'Hurricane' force winds of 64 knots or above 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.

Technical Marine Synopsis

Issued 10:00 AM NST 4 November 2025 Today Tonight and Wednesday At 10:00 a.m. NST today intensifying low 971 mb located near
Sable Island.
By 10:00 a.m. NST Wednesday low 948 mb located over southeastern
Funk Island Bank.

At 10:00 a.m. NST today ridge located on a line north-south over
the eastern Grand Banks.
By 3:30 p.m. NST today departing ridge located east of the Marine
District.

Marine Weather Statement

Issued 9:58 AM NST 4 November 2025 A rapidly intensifying low pressure system near Sable Island will
track northeastward across Eastern Newfoundland this evening and
across Funk Island Bank on Wednesday. Storm to hurricane force
northeasterlies to southeasterlies will develop ahead of the low this
afternoon and will shift to storm to hurricane force southwesterlies
to northwesterlies in its wake.

Large waves and pounding surf will produce higher than normal water
levels along south facing shorelines on Tuesday and along north
facing shorelines on Wednesday, especially near high tides.

Marine interests are advised that hurricane force wind warnings are
in effect for South Coast, East Coast - Cape St. Francis and south,
and Southwestern Grand Banks. Storm warnings are in effect for all
remaining waters except Strait of Belle Isle and Gulf waters, where
gale warnings are in effect.

Marine interests are also advised that high water level warnings are
in effect for Southwest Coast - Ramea and east, South Coast, East
Coast, and Northeast Coast - Cape St. John and south.

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