Y Tywydd Dyfroedd Gyda'r Glannau

Gosodiadau
Iaith

Mae'r cynnwys hwn ar gael yn Saesneg yn unig.

Summary

A ridge of high pressure will build across the United Kingdom this morning to bring a spell of calmer weather. As this ridge moves eastwards, southwesterly winds will increase for northwestern waters later this afternoon.

* Wind or gale warning issued

  1. From Cape Wrath to Rattray Head including Orkney * warning

    From Cape Wrath to Rattray Head including Orkney

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    Strong wind warning

    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      Westerly 4 or 5, backing southwesterly 5 to 7, increasing gale 8 at times near Cape Wrath.
    • Sea State

      Mainly slight in Moray Firth, otherwise moderate or rough, occasionally very rough later in north.
    • Weather

      Occasional rain in north.
    • Visibility

      Good, occasionally moderate in north.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      Southwesterly, veering westerly later, 5 to 7, occasionally gale 8 in north.
    • Sea State

      Slight or moderate in east, moderate or rough, occasionally very rough in north.
    • Weather

      Occasional rain or drizzle in north.
    • Visibility

      Moderate or good, occasionally poor in north.

    Issued at 06:00 UTC on Monday 18th Dec

  2. Rattray Head to Berwick on Tweed * warning

    Rattray Head to Berwick on Tweed

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    Strong wind warning

    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      West, backing southwest, 4 or 5, increasing 6 at times later.
    • Sea State

      Slight or moderate.
    • Weather

      Fair.
    • Visibility

      Good.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      Southwest, veering west later, 4 or 5, increasing 6 at times until later.
    • Sea State

      Slight, occasionally moderate near Rattray Head.
    • Weather

      Fair.
    • Visibility

      Good.

    Issued at 06:00 UTC on Monday 18th Dec

  3. Berwick on Tweed to Whitby

    Berwick on Tweed to Whitby

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    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      Northwest, backing west or southwest, 4 or 5.
    • Sea State

      Moderate becoming slight.
    • Weather

      Fair.
    • Visibility

      Good.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      Southwest, veering west later, 4 or 5.
    • Sea State

      Slight or moderate.
    • Weather

      Mainly fair.
    • Visibility

      Good, occasionally poor later.

    Issued at 06:00 UTC on Monday 18th Dec

  4. Whitby to Gibraltar Point

    Whitby to Gibraltar Point

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    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      Northwest 4 or 5, backing west 3 or 4.
    • Sea State

      Moderate, becoming slight.
    • Weather

      Fog patches developing later near shore.
    • Visibility

      Moderate or good, occasionally very poor later near shore.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      West or southwest 3 or 4.
    • Sea State

      Slight, becoming smooth later.
    • Weather

      Fog patches at first near shore.
    • Visibility

      Moderate or good, occasionally very poor at first near shore.

    Issued at 06:00 UTC on Monday 18th Dec

  5. Gibraltar Point to North Foreland

    Gibraltar Point to North Foreland

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    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      Northerly or northwesterly, backing westerly later, 3 or 4, occasionally 5 at first.
    • Sea State

      Slight or moderate, becoming smooth or slight later.
    • Weather

      Fog patches developing later especially near shore and in Thames estuary.
    • Visibility

      Moderate or good, occasionally very poor later near shore.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      Westerly 3 or 4.
    • Sea State

      Smooth or slight.
    • Weather

      Fog patches at first, especially near shore and in Thames estuary.
    • Visibility

      Moderate or good, occasionally very poor at first especially near shore and in Thames estuary.

    Issued at 06:00 UTC on Monday 18th Dec

  6. North Foreland to Selsey Bill

    North Foreland to Selsey Bill

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    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      Northerly 4 or 5, backing northwesterly 2 or 3 later.
    • Sea State

      Slight or moderate, becoming smooth or slight.
    • Weather

      Fog patches developing later near shore.
    • Visibility

      Moderate or good, occasionally very poor later near shore.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      Westerly or northwesterly 3 or 4, occasionally 2 at first.
    • Sea State

      Smooth or slight.
    • Weather

      Fog patches at first near shore.
    • Visibility

      Moderate or good, occasionally very poor at first near shore.

    Issued at 06:00 UTC on Monday 18th Dec

  7. Selsey Bill to Lyme Regis

    Selsey Bill to Lyme Regis

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    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      North 3 or 4, becoming variable 3 or 4 later.
    • Sea State

      Smooth or slight.
    • Weather

      Fog patches developing later near shore.
    • Visibility

      Moderate or good, occasionally very poor later near shore.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      Variable 2 or 3, becoming west or southwest 3 or 4.
    • Sea State

      Smooth or slight.
    • Weather

      Fog patches at first, occasional drizzle later.
    • Visibility

      Moderate or good, occasionally very poor at first.

    Issued at 06:00 UTC on Monday 18th Dec

  8. Lyme Regis to Lands End including the Isles of Scilly

    Lyme Regis to Lands End including the Isles of Scilly

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    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      North or northeast, veering south or southwest later, 3 or 4.
    • Sea State

      Moderate west of the Lizard peninsula, otherwise slight.
    • Weather

      Mainly fair.
    • Visibility

      Good.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      South or southwest, 3 or 4.
    • Sea State

      Slight east of the Lizard peninsula, otherwise moderate, occasionally rough later near Isles of Scilly.
    • Weather

      Occasional drizzle, fog patches later.
    • Visibility

      Moderate or good, occasionally poor, or very poor later.

    Issued at 06:00 UTC on Monday 18th Dec

  9. Lands End to St Davids Head including the Bristol Channel

    Lands End to St Davids Head including the Bristol Channel

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    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      North or northeast, veering south, 3 or 4.
    • Sea State

      Slight or moderate.
    • Weather

      Mainly fair.
    • Visibility

      Good.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      South or southwest 3 or 4.
    • Sea State

      Slight or moderate, occasionally rough later near Lands End.
    • Weather

      Occasional drizzle, fog patches developing later.
    • Visibility

      Moderate or good, occasionally poor, or very poor later.

    Issued at 06:00 UTC on Monday 18th Dec

  10. St Davids Head to Great Ormes Head, including St Georges Channel

    St Davids Head to Great Ormes Head, including St Georges Channel

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    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      Northerly, becoming variable, then becoming southwesterly, 3 or 4, occasionally 5 later in north.
    • Sea State

      Slight, occasionally moderate at first in south.
    • Weather

      Fair.
    • Visibility

      Good.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      Southerly or southwesterly, 3 or 4, increasing 5 at times in north.
    • Sea State

      Slight, occasionally moderate.
    • Weather

      Occasional drizzle with fog patches.
    • Visibility

      Moderate or good, occasionally very poor.

    Issued at 06:00 UTC on Monday 18th Dec

  11. Great Ormes Head to the Mull of Galloway

    Great Ormes Head to the Mull of Galloway

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    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      Variable, becoming southwest, 3 or 4, increasing 5 at times later.
    • Sea State

      Smooth or slight.
    • Weather

      Mainly fair.
    • Visibility

      Good.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      Southwest 4 or 5, veering west 3 or 4 later.
    • Sea State

      Slight, occasionally moderate.
    • Weather

      Occasional drizzle with fog patches.
    • Visibility

      Moderate or good, occasionally very poor.

    Issued at 06:00 UTC on Monday 18th Dec

  12. Isle of Man

    Isle of Man

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    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      Variable, becoming southwest, 3 or 4, increasing 5 at times later.
    • Sea State

      Smooth or slight.
    • Weather

      Fair.
    • Visibility

      Good.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      Southwest 4 or 5, veering west 3 or 4 later.
    • Sea State

      Slight, occasionally moderate.
    • Weather

      Occasional drizzle with fog patches.
    • Visibility

      Moderate or good, occasionally very poor.

    Issued at 06:00 UTC on Monday 18th Dec

  13. Lough Foyle to Carlingford Lough

    Lough Foyle to Carlingford Lough

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    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      West, backing southwest, 4 or 5, occasionally 3 at first.
    • Sea State

      Smooth or slight, occasionally moderate in north.
    • Weather

      Fair.
    • Visibility

      Good.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      South or southwest, veering west later, 4 or 5.
    • Sea State

      Moderate or rough in north, otherwise slight.
    • Weather

      Occasional drizzle.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 06:00 UTC on Monday 18th Dec

  14. The Mull of Galloway to Mull of Kintyre including the Firth of Clyde and the North Channel

    The Mull of Galloway to Mull of Kintyre including the Firth of Clyde and the North Channel

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    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      Westerly 3 or 4, backing southwesterly 4 or 5.
    • Sea State

      Slight, occasionally smooth at first in shelter, then occasionally moderate later near Mull of Kintyre.
    • Weather

      Fair.
    • Visibility

      Good.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      Southerly or southwesterly, veering westerly later, 4 or 5, increasing 6 for a time.
    • Sea State

      Slight or moderate, occasionally rough later near Mull of Kintyre.
    • Weather

      Occasional drizzle.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 06:00 UTC on Monday 18th Dec

  15. Mull of Kintyre to Ardnamurchan Point * warning

    Mull of Kintyre to Ardnamurchan Point

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    Strong wind warning

    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      Southerly or southwesterly 4 or 5, increasing 6 at times later in north.
    • Sea State

      Moderate or rough.
    • Weather

      Fair, then occasional drizzle.
    • Visibility

      Moderate or good, occasionally poor.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      Southerly or southwesterly 5 to 7, veering westerly 4 or 5 later, perhaps gale 8 for a time near Ardnamurchan Point.
    • Sea State

      Moderate or rough, occasionally very rough later.
    • Weather

      Occasional rain or drizzle.
    • Visibility

      Moderate or poor, occasionally good.

    Issued at 06:00 UTC on Monday 18th Dec

  16. The Minch * warning

    The Minch

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    Strong wind warning

    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      Southwest 5 to 7.
    • Sea State

      Rough in far south and in far north, otherwise slight or moderate.
    • Weather

      Occasional drizzle.
    • Visibility

      Moderate or good, occasionally poor.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      Southwest 5 to 7, increasing gale 8 for a time, then veering west 5 or 6 later.
    • Sea State

      Moderate in central areas, otherwise rough or very rough.
    • Weather

      Occasional drizzle, rain at times later.
    • Visibility

      Moderate or poor, occasionally good.

    Issued at 06:00 UTC on Monday 18th Dec

  17. Ardnamurchan Point to Cape Wrath including the Outer Hebrides * warning

    Ardnamurchan Point to Cape Wrath including the Outer Hebrides

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    Strong wind warning

    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      Southwest 5 to 7, increasing gale 8 at times near Cape Wrath.
    • Sea State

      Rough.
    • Weather

      Occasional drizzle.
    • Visibility

      Moderate or good, occasionally poor.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      Southwest 6 to gale 8, veering west 5 to 7 later.
    • Sea State

      Rough or very rough, occasionally high later in north.
    • Weather

      Occasional drizzle, rain at times later.
    • Visibility

      Moderate or poor, occasionally good.

    Issued at 06:00 UTC on Monday 18th Dec

  18. Shetland Isles * warning

    Shetland Isles

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    Strong wind warning

    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      Westerly 5 or 6, backing southwesterly 5 to 7, perhaps gale 8 later in west.
    • Sea State

      Moderate in sheltered east, otherwise rough, occasionally very rough later in west.
    • Weather

      Fair, then occasional rain or drizzle.
    • Visibility

      Moderate or good, occasionally poor.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      --
    • Sea State

      --
    • Weather

      --
    • Visibility

      --

    Issued at 06:00 UTC on Monday 18th Dec

    For coastal areas up to 60 nautical miles from Lerwick, Shetland

    Gale Warnings in operation for Sea Area Fair Isle: Southwesterly gale ofrce 8 expected soon (issued 18/0347)

    06:00 UTC Mon 18th Dec – 17:59 UTC Mon 18th Dec

    • Wind

      West 4 backing southwest 5 or 6
    • Sea State

      Moderate or rough, occasionally very rough in west later
    • Weather

      Rain at times
    • Visibility

      Good becoming moderate or poor

    18:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      Southwest 5 or 6
    • Sea State

      Moderate or rough, occasionally very rough in west
    • Weather

      Rain or drizzle at times
    • Visibility

      Moderate or poor

    Issued at 06:00 UTC on Monday 18th Dec

  19. The Channel Islands

    The Channel Islands

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    06:00 UTC Mon 18th Dec – 05:59 UTC Tue 19th Dec

    • Wind

      North to northeast 4 to 5, decreasing 3 to 4 by midday then 2 to 3 by evening, becoming variable by midnight.
    • Sea State

      Slight to moderate, decreasing smooth or slight this afternoon.
    • Weather

      Perhaps a little drizzle and mist in the far south at first risk of mist or fog patches near the french coasts overnight.
    • Visibility

      Good, perhaps locally moderate to very poor.

    06:00 UTC Tue 19th Dec – 05:59 UTC Wed 20th Dec

    • Wind

      Variable 1 to 3, becoming southwest by midday then west in the evening, veering northwest overnight.
    • Sea State

      Smooth or slight, with a low swell.
    • Weather

      Risk of mist or fog patches near the french coasts Tuesday morning mist and fog patches with patchy drizzle overnight.
    • Visibility

      Moderate to good, perhaps locally poor or very poor, becoming moderate to very poor overnight.

    Issued at 06:00 UTC on Monday 18th Dec