Y Tywydd Dyfroedd Gyda'r Glannau

Gosodiadau
Iaith

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

Summary

High pressure will persist across Scandinavia, whilst a complex area of low pressure remains over the Atlantic. A deepening area of low pressure will move into the Southwest Approaches during Friday.

* 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

    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      Southeasterly backing easterly 4 or 5, occasionally 6 at first in northeast.
    • Sea State

      Slight or moderate.
    • Weather

      Occasional rain or showers, becoming mainly fair in northwest, fog patches in east.
    • Visibility

      Moderate or good, occasionally very poor in east.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      East 4 or 5, increasing 6 or 7.
    • Sea State

      Slight or moderate, becoming moderate or rough.
    • Weather

      Occasional rain or showers, fog patches.
    • Visibility

      Moderate or good, occasionally very poor.

    Issued at 11:00 UTC on Thursday 24th Apr

  2. Rattray Head to Berwick on Tweed

    Rattray Head to Berwick on Tweed

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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      Southeasterly backing easterly 3 or 4, occasionally 5 in north.
    • Sea State

      Slight or moderate.
    • Weather

      Occasional rain or showers, fog patches.
    • Visibility

      Moderate or poor, occasionally very poor.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      East 4 or 5, increasing 6 at times.
    • Sea State

      Slight or moderate.
    • Weather

      Occasional rain, fog patches.
    • Visibility

      Moderate or poor, occasionally very poor.

    Issued at 11:00 UTC on Thursday 24th Apr

  3. Berwick on Tweed to Whitby

    Berwick on Tweed to Whitby

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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      Variable 3 or less, becoming east 3 or 4.
    • Sea State

      Mainly slight.
    • Weather

      Occasional rain or showers, fog patches.
    • Visibility

      Moderate or poor, occasionally very poor.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      East 3 or 4, veering southeast 5 or 6.
    • Sea State

      Slight becoming moderate.
    • Weather

      Occasional rain, fog patches.
    • Visibility

      Moderate or poor, occasionally very poor.

    Issued at 11:00 UTC on Thursday 24th Apr

  4. Whitby to Gibraltar Point

    Whitby to Gibraltar Point

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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      Variable 3 or less, becoming east or northeast 4 or 5.
    • Sea State

      Slight.
    • Weather

      Occasional rain or showers, fog patches.
    • Visibility

      Moderate or good, occasionally very poor.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      East veering southeast 4 or 5, increasing 6 at times.
    • Sea State

      Slight, occasionally moderate.
    • Weather

      Occasional rain or showers, fog patches.
    • Visibility

      Moderate or poor, occasionally very poor.

    Issued at 11:00 UTC on Thursday 24th Apr

  5. Gibraltar Point to North Foreland

    Gibraltar Point to North Foreland

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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      Northeasterly 3, increasing 4 or 5, veering easterly later.
    • Sea State

      Slight.
    • Weather

      Occasional rain or showers, fog patches.
    • Visibility

      Moderate or good, occasionally very poor.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      Easterly 4 or 5, veering southerly or southwesterly 5 or 6.
    • Sea State

      Slight, occasionally moderate.
    • Weather

      Rain or showers, occasionally thundery, fog patches.
    • Visibility

      Moderate or good, occasionally very poor.

    Issued at 11:00 UTC on Thursday 24th Apr

  6. North Foreland to Selsey Bill

    North Foreland to Selsey Bill

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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      Variable 3 or less, becoming northeasterly 4 or 5.
    • Sea State

      Slight, occasionally moderate.
    • Weather

      Showers.
    • Visibility

      Moderate or good, occasionally poor.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      Northeasterly becoming cyclonic 3 or 4, then becoming southwesterly 4 or 5, occasionally 6, backing southerly later.
    • Sea State

      Slight or moderate.
    • Weather

      Occasional rain or thundery showers.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 11:00 UTC on Thursday 24th Apr

  7. Selsey Bill to Lyme Regis

    Selsey Bill to Lyme Regis

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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      Variable 3 or less, becoming north or northeast, backing northwest later, 3 or 4.
    • Sea State

      Mainly slight.
    • Weather

      Showers later in east.
    • Visibility

      Moderate or good, occasionally poor.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      North 3 or 4, backing southwest 4 or 5, then backing south later 5 or 6.
    • Sea State

      Slight becoming moderate.
    • Weather

      Rain or thundery showers later.
    • Visibility

      Moderate or good, occasionally poor.

    Issued at 11:00 UTC on Thursday 24th Apr

  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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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      Southeast becoming variable 3 or 4.
    • Sea State

      Slight or moderate, occasionally rough at first in far west.
    • Weather

      Mainly fair.
    • Visibility

      Good, occasionally moderate.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      Variable 3 or 4, becoming southerly or southeasterly 5 to 7, then veering southwesterly, perhaps gale 8 later in west.
    • Sea State

      Slight or moderate, becoming moderate or rough, and very rough later in far west.
    • Weather

      Mainly fair then rain.
    • Visibility

      Good, becoming moderate or poor later.

    Issued at 11:00 UTC on Thursday 24th Apr

  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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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      East becoming variable 3 or 4.
    • Sea State

      Slight in east, moderate in west.
    • Weather

      Mainly fair.
    • Visibility

      Good, occasionally moderate.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      Variable 3 or 4, becoming south or southeast 5 to 7, perhaps gale 8 later.
    • Sea State

      Slight or moderate, becoming moderate or rough, and very rough later in west.
    • Weather

      Showers, rain later.
    • Visibility

      Moderate or good, occasionally poor later.

    Issued at 11:00 UTC on Thursday 24th Apr

  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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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      Variable becoming east, 3 or 4.
    • Sea State

      Slight, but moderate near St Davids Head.
    • Weather

      Mainly fair.
    • Visibility

      Good, occasionally moderate.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      East 3 or 4, veering southeast 5 to 7.
    • Sea State

      Slight or moderate, becoming moderate or rough.
    • Weather

      Showers, rain later.
    • Visibility

      Good, occasionally poor later.

    Issued at 11:00 UTC on Thursday 24th Apr

  11. Great Ormes Head to the Mull of Galloway

    Great Ormes Head to the Mull of Galloway

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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      Variable, becoming east or northeast 3 or 4.
    • Sea State

      Smooth or slight.
    • Weather

      Mainly fair.
    • Visibility

      Good, occasionally moderate.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      East or northeast 3 or 4, increasing 5 or 6.
    • Sea State

      Smooth or slight, becoming slight or moderate.
    • Weather

      Showers, rain later.
    • Visibility

      Moderate or good, occasionally poor later.

    Issued at 11:00 UTC on Thursday 24th Apr

  12. Isle of Man

    Isle of Man

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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      South or southeast 2 or 3, backing northeast 3 or 4.
    • Sea State

      Slight.
    • Weather

      Mainly fair.
    • Visibility

      Good, occasionally moderate.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      East 3 or 4, increasing 4 or 5, occasionally 6 later.
    • Sea State

      Slight, becoming moderate later.
    • Weather

      Mainly fair, showers later.
    • Visibility

      Good, occasionally moderate later.

    Issued at 11:00 UTC on Thursday 24th Apr

  13. Lough Foyle to Carlingford Lough

    Lough Foyle to Carlingford Lough

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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      South or southeast backing east, 3 or 4.
    • Sea State

      Smooth or slight in east, slight or moderate in north.
    • Weather

      Mainly fair.
    • Visibility

      Mainly good.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      East 3 or 4, increasing 5 or 6 for a time.
    • Sea State

      Smooth or slight, becoming slight or moderate.
    • Weather

      Rain later.
    • Visibility

      Good, occasionally moderate.

    Issued at 11:00 UTC on Thursday 24th Apr

  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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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      Variable 3 or 4, becoming northeasterly 4 or 5.
    • Sea State

      Smooth or slight.
    • Weather

      Fair.
    • Visibility

      Mainly good.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      Easterly or northeasterly 3 or 4, increasing 5 or 6 for a time.
    • Sea State

      Smooth or slight, becoming slight or moderate.
    • Weather

      Rain later.
    • Visibility

      Good, occasionally moderate later.

    Issued at 11:00 UTC on Thursday 24th Apr

  15. Mull of Kintyre to Ardnamurchan Point

    Mull of Kintyre to Ardnamurchan Point

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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      South backing east 3 or 4.
    • Sea State

      Slight or moderate.
    • Weather

      Fair.
    • Visibility

      Mainly good.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      East 3 or 4, increasing 5 or 6, backing northeast later.
    • Sea State

      Slight or moderate.
    • Weather

      Rain or showers later.
    • Visibility

      Mainly good.

    Issued at 11:00 UTC on Thursday 24th Apr

  16. The Minch

    The Minch

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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      South becoming variable, then east or northeast, 3 or 4.
    • Sea State

      Smooth or slight, but moderate in far south.
    • Weather

      Fair.
    • Visibility

      Good.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      East or northeast 3 or 4, increasing 5 to 7.
    • Sea State

      Smooth or slight, becoming slight or moderate.
    • Weather

      Rain or showers later.
    • Visibility

      Good, occasionally moderate later.

    Issued at 11:00 UTC on Thursday 24th Apr

  17. Ardnamurchan Point to Cape Wrath including the Outer Hebrides

    Ardnamurchan Point to Cape Wrath including the Outer Hebrides

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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      Southerly 4 or 5, backing easterly 3 or 4, occasionally 5 in north later.
    • Sea State

      Slight near Sutherland, otherwise moderate.
    • Weather

      Fair.
    • Visibility

      Good.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      Easterly or northeasterly 4 or 5, increasing 6 or 7.
    • Sea State

      Slight or moderate, becoming moderate or rough.
    • Weather

      Rain or showers later.
    • Visibility

      Good, occasionally moderate later.

    Issued at 11:00 UTC on Thursday 24th Apr

  18. Shetland Isles * warning

    Shetland Isles

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    Strong wind warning

    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      Southeast 5 or 6, decreasing 4 or 5, backing east later.
    • Sea State

      Moderate, occasionally rough at first.
    • Weather

      Occasional rain, fog patches.
    • Visibility

      Moderate or good, occasionally very poor.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      --
    • Sea State

      --
    • Weather

      --
    • Visibility

      --

    Issued at 11:00 UTC on Thursday 24th Apr

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

    Gale Warnings in operation for Sea Area Fair Isle: Nil

    11:00 UTC Thu 24th Apr – 22:59 UTC Thu 24th Apr

    • Wind

      Souteast 5 or 6, decreasing 4 later.
    • Sea State

      Moderate, rough at first in north.
    • Weather

      Fog patches at first mainly in south. Occasional rain later.
    • Visibility

      Poor, becoming good, occasionally moderate later.

    23:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      Southeast 4 or 5 backing east 5 or 6 later.
    • Sea State

      Moderate.
    • Weather

      Occasional rain.
    • Visibility

      Moderate or good.

    Issued at 11:00 UTC on Thursday 24th Apr

  19. The Channel Islands

    The Channel Islands

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    11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

    • Wind

      Mainly easterly 1 to 3, backing northeast to north during the afternoon and increasing 3 to 4, further backing north to northwest by morning, perhaps locally 5, backing west by midday.
    • Sea State

      Smooth or slight, locally moderate later.
    • Weather

      Rain at times overnight and Friday morning.
    • Visibility

      Good, locally moderate to poor in rain.

    11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

    • Wind

      West 2 to 4, backing southerly by evening and increasing 4 to 5, perhaps 6 for a time around midnight, veering south to southwest in the morning.
    • Sea State

      Slight, locally moderate becoming moderate, locally rather rough overnight, with swell.
    • Weather

      Rain in the east at first clearing further rain spreading in from the east overnight, clearing Saturday morning.
    • Visibility

      Moderate to good, locally moderate to poor in rain.

    Issued at 11:00 UTC on Thursday 24th Apr

From Cape Wrath to Rattray Head including Orkney

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Strong wind warning

11:00 UTC Thu 24th Apr – 10:59 UTC Fri 25th Apr

  • Wind

    Southeasterly backing easterly 4 or 5, occasionally 6 at first in northeast.
  • Sea State

    Slight or moderate.
  • Weather

    Occasional rain or showers, becoming mainly fair in northwest, fog patches in east.
  • Visibility

    Moderate or good, occasionally very poor in east.

11:00 UTC Fri 25th Apr – 10:59 UTC Sat 26th Apr

  • Wind

    East 4 or 5, increasing 6 or 7.
  • Sea State

    Slight or moderate, becoming moderate or rough.
  • Weather

    Occasional rain or showers, fog patches.
  • Visibility

    Moderate or good, occasionally very poor.

Issued at 11:00 UTC on Thursday 24th Apr