Southwestern Grand Banks, Canada Marine Forecast, Warnings and Alerts

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Southwestern Grand Banks

Marine Forecast

Issued 08:00 PM NST 19 December 2025

Tonight and Saturday.

Storm warning in effect.

Wind south 25 knots increasing to south 35 to 45 near midnight and to south 45 to 55 Saturday morning. Wind diminishing to west 35 Saturday afternoon.

Showers Saturday. Fog patches forming Saturday morning and dissipating Saturday evening.

Winds

Issued 08:00 PM NST 19 December 2025

Tonight and Saturday. Storm warning in effect. Wind south 25 knots increasing to south 35 to 45 near midnight and to south 45 to 55 Saturday morning. Wind diminishing to west 35 Saturday afternoon.

Waves

Issued 06:00 PM NST 19 December 2025

Tonight and Saturday. Seas 2 to 3 metres building to 3 to 5 late overnight and to 5 to 7 near noon Saturday.

Weather & Visibility

Issued 08:00 PM NST 19 December 2025

Tonight and Saturday. Showers Saturday. Fog patches forming Saturday morning and dissipating Saturday evening.

Ice Forecasts

Southwestern Grand Banks

Issued 10:00 AM EST 19 December 2025 Today Tonight and Saturday

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 19 December 2025 Today Tonight and Saturday

Ice Edge

Ice Coverage

Forecasts available to mariners upon request.

Iceberg Bulletin

Southwestern Grand Banks

Issued 1:30 PM EST 19 December 2025

Iceberg Limit

Iceberg limit at 0000 UTC 20 Dec estimated from Newfoundland near
5020N 5628W to 5030N 5415W to 5330N 5200W to 5945N 5730W then
northeastward.

Iceberg Count

No confirmed icebergs.

Iceberg Bulletin

Tail of the Grand Banks

Issued 1:30 PM EST 19 December 2025

Iceberg Limit

Iceberg limit at 0000 UTC 20 Dec estimated from Newfoundland near
5020N 5628W to 5030N 5415W to 5330N 5200W to 5945N 5730W then
northeastward.

Iceberg Count

Forecasts available to mariners upon request.

Warnings (In effect)

Storm warning in effect

Southwestern Grand Banks

Issued 8:00 PM NST 19 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.

Technical Marine Synopsis

Issued 8:00 PM NST 19 December 2025 Tonight and Saturday At 8:00 p.m. NST tonight deepening low 972 mb located over central
Quebec.
By 8:00 p.m. NST Saturday low 947 mb located over southern
Labrador Sea.

At 8:00 p.m. NST tonight trough from 972 mb low located on a line
north-south over Maine.
By 8:00 p.m. NST Saturday trough from 947 mb low located on a line
north-south over the Grand Banks.

Marine Weather Statement

Issued 3:19 PM NST 19 December 2025 A trough of low pressure associated with a rapidly intensifying low
over Quebec will approach from the west tonight and cross the
district on Saturday. Strong to gale force southerlies to
southwesterlies will spread across all waters today then increase to
gale to storm force southerlies tonight and Saturday ahead of the
trough. Winds will shift and diminish to strong to gale force
westerlies in its wake.

Marine interests are advised that storm warnings are in effect for
all waters except the Southeastern Grand Banks where a gale warning
is in effect.

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.

Marine interests are further advised that higher than normal water
levels are expected Saturday morning along the west coast of
Newfoundland including the western side of the Great Northern
Peninsula, as well as both sides of the Strait of Belle Isle. This is
due to a combination of high waves and pounding surf, storm surge,
and a higher run of tides.

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