Southwestern Grand Banks, Canada Marine Forecast, Warnings and Alerts

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Southwestern Grand Banks

Marine Forecast

Issued 03:00 AM NDT 25 August 2026

Today Tonight and Wednesday.

Wind south 15 knots increasing to south 20 this afternoon and to south 30 near midnight. Wind diminishing to west 15 to 20 Wednesday morning and to west 10 to 15 Wednesday evening.

Showers and fog banks ending Wednesday afternoon. Risk of thunderstorms this morning.

Winds

Issued 03:00 AM NDT 25 August 2026

Today Tonight and Wednesday. Wind south 15 knots increasing to south 20 this afternoon and to south 30 near midnight. Wind diminishing to west 15 to 20 Wednesday morning and to west 10 to 15 Wednesday evening.

Waves

Issued 06:00 PM NDT 24 August 2026

Tonight and Tuesday. Seas 1 metre or less building to 1 to 2 late overnight and to 2 to 3 Tuesday afternoon.

Weather & Visibility

Issued 03:00 AM NDT 25 August 2026

Today Tonight and Wednesday. Showers and fog banks ending Wednesday afternoon. Risk of thunderstorms this morning.

Ice Forecasts

Southwestern Grand Banks

Issued 10:00 AM EDT 7 August 2026 Forecasts have ended for the season.

Ice Forecasts

Tail of the Grand Banks

Issued 10:00 AM EDT 7 August 2026 Forecasts have ended for the season.

Iceberg Bulletin

Southwestern Grand Banks

Issued 2:34 PM EDT 24 August 2026

Iceberg Limit

Iceberg limit at 0000 UTC 25 Aug estimated from Newfoundland near
4915N 5330W to 4940N 5320W to 5500N 5400W to 6000N 5600W to 6020N
5200W then eastward.

Iceberg Count

No confirmed icebergs.

Iceberg Bulletin

Tail of the Grand Banks

Issued 2:34 PM EDT 24 August 2026

Iceberg Limit

Iceberg limit at 0000 UTC 25 Aug estimated from Newfoundland near
4915N 5330W to 4940N 5320W to 5500N 5400W to 6000N 5600W to 6020N
5200W then eastward.

Iceberg Count

Forecasts available to mariners upon request.

No watches or warnings in effect.

Technical Marine Synopsis

Issued 3:00 AM NDT 25 August 2026 Today Tonight and Wednesday At 3:00 a.m. NDT today trough located on a line northwest-southeast
over Belle Isle Bank.
By 3:30 p.m. NDT today departing trough located east of Belle
Isle Bank.

At 10:00 a.m. NDT today low 1010 mb located south of Nova Scotia.
By 10:00 a.m. NDT Wednesday low 1010 mb located southeast of the
Avalon Peninsula.

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