Y Tywydd Dyfroedd Gyda'r Glannau

Gosodiadau
Iaith

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

Summary

A complex area of low pressure over the United Kingdom will only edge away slowly northeastwards and will bring another very unsettled and windy day to all areas on Friday. A ridge of high pressure will then build across southern areas during Saturday.

* 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

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      Southerly or southwesterly becoming cyclonic 4 or 5, then westerly or northwesterly 5 to 7 later.
    • Sea State

      Smooth at times in Moray Firth, otherwise slight or moderate.
    • Weather

      Rain or showers, occasionally thundery.
    • Visibility

      Good, occasionally poor.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      Westerly or northwesterly 5 or 6, occasionally 7 in east.
    • Sea State

      Smooth at times in Moray Firth, otherwise slight or moderate.
    • Weather

      Showers, occasionally thundery.
    • Visibility

      Mainly good.

    Issued at 00:00 UTC on Friday 18th Aug

  2. Rattray Head to Berwick on Tweed * warning

    Rattray Head to Berwick on Tweed

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      South 4 or 5, veering west or southwest 6 or 7, occasionally gale 8.
    • Sea State

      Slight or moderate, occasional rough in northeast.
    • Weather

      Rain or showers, occasionally thundery.
    • Visibility

      Good, occasionally poor.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      West or southwest 5 to 7.
    • Sea State

      Slight or moderate.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

  3. Berwick on Tweed to Whitby * warning

    Berwick on Tweed to Whitby

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      South 3 or 4, increasing 5 to 7, then veering southwest.
    • Sea State

      Slight or moderate.
    • Weather

      Showers, perhaps thundery later.
    • Visibility

      Mainly good.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      West or southwest 5 to 7.
    • Sea State

      Slight or moderate.
    • Weather

      Showers for a time.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

  4. Whitby to Gibraltar Point * warning

    Whitby to Gibraltar Point

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      Southwest 3 or 4, increasing 5 or 6, occasionally 7 later.
    • Sea State

      Smooth or slight, becoming slight or moderate.
    • Weather

      Thundery showers later.
    • Visibility

      Good, occasionally moderate later.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      West or southwest 5 to 7.
    • Sea State

      Slight or moderate.
    • Weather

      Showers for a time.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

  5. Gibraltar Point to North Foreland * warning

    Gibraltar Point to North Foreland

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      Westerly or southwesterly 5 or 6, occasionally 7 later.
    • Sea State

      Smooth at first in shelter, otherwise slight or moderate.
    • Weather

      Showers later, perhaps thundery in north.
    • Visibility

      Good.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      Westerly or southwesterly 5 to 7, decreasing 4 at times later.
    • Sea State

      Slight or moderate.
    • Weather

      Mainly fair.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

  6. North Foreland to Selsey Bill * warning

    North Foreland to Selsey Bill

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      Southwesterly veering westerly later, 5 or 6, increasing 7, perhaps gale 8 later.
    • Sea State

      Slight or moderate, becoming moderate or rough later.
    • Weather

      Showers later.
    • Visibility

      Good.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      Westerly 5 to 7.
    • Sea State

      Moderate or rough, becoming slight or moderate later.
    • Weather

      Mainly fair.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

  7. Selsey Bill to Lyme Regis * warning

    Selsey Bill to Lyme Regis

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      West or southwest 5 or 6, increasing 7, perhaps gale 8 later.
    • Sea State

      Slight or moderate, becoming moderate or rough later.
    • Weather

      Showers later.
    • Visibility

      Good.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      West 5 to 7, decreasing 4 at times later.
    • Sea State

      Moderate or rough, becoming slight or moderate later.
    • Weather

      Mainly fair.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

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

    Lyme Regis to Lands End including the Isles of Scilly

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      West 5 to 7.
    • Sea State

      Slight or moderate, becoming moderate or rough later.
    • Weather

      Showers.
    • Visibility

      Good.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      West 5 to 7, decreasing 3 or 4, then backing southwest 5 or 6 later.
    • Sea State

      Moderate or rough, becoming slight or moderate for a time.
    • Weather

      Showers at first.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

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

    Lands End to St Davids Head including the Bristol Channel

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      West 5 to 7, perhaps gale 8 later.
    • Sea State

      Slight or moderate, becoming moderate or rough.
    • Weather

      Showers.
    • Visibility

      Good.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      West or northwest backing southwest later, 5 to 7, decreasing 4 for a time.
    • Sea State

      Moderate or rough.
    • Weather

      Showers at first.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

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

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

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

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

      Moderate, occasionally rough later.
    • Weather

      Showers, squally for a time later.
    • Visibility

      Good, occasionally moderate later.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      West 6 to gale 8, decreasing 4 or 5, backing south or southwest 5 or 6 later.
    • Sea State

      Moderate or rough.
    • Weather

      Mainly fair.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

  11. Great Ormes Head to the Mull of Galloway * warning

    Great Ormes Head to the Mull of Galloway

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      West or southwest 5 to 7, perhaps gale 8 later.
    • Sea State

      Moderate, occasionally rough later.
    • Weather

      Showers.
    • Visibility

      Mainly good.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      West 6 or 7, occasionally gale 8 at first, decreasing 4 or 5, then backing southwest later.
    • Sea State

      Moderate or rough, becoming slight or moderate later.
    • Weather

      Mainly fair.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

  12. Isle of Man * warning

    Isle of Man

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      Southwest veering west or northwest later, 5 or 6, occasionally 7 at first.
    • Sea State

      Moderate, occasionally rough.
    • Weather

      Showers, occasional rain later.
    • Visibility

      Good, occasionally moderate.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      West or northwest backing southwest 5 or 6, occasionally 7 at first, decreasing 4 or 5 later.
    • Sea State

      Moderate, occasionally rough, becoming slight or moderate later.
    • Weather

      Mainly fair.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

  13. Lough Foyle to Carlingford Lough * warning

    Lough Foyle to Carlingford Lough

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      Southwest 4 or 5, veering west 5 to 7, perhaps gale 8 later.
    • Sea State

      Slight or moderate, becoming moderate or rough later in north.
    • Weather

      Showers, occasionally thundery.
    • Visibility

      Mainly good.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      West 5 to 7, backing south or southeast 4 or 5 later.
    • Sea State

      Moderate or rough at first in north, otherwise slight or moderate, becoming smooth or slight later in east.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

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

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

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      Southwesterly 4 or 5, veering westerly 5 to 7, perhaps gale 8 later.
    • Sea State

      Slight or moderate, occasionally rough later in far north.
    • Weather

      Showers, occasionally thundery.
    • Visibility

      Mainly good.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      Westerly 5 to 7, backing southerly or southeasterly 4 or 5 later.
    • Sea State

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

      Showers.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

  15. Mull of Kintyre to Ardnamurchan Point * warning

    Mull of Kintyre to Ardnamurchan Point

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      Cyclonic becoming west 5 or 6, veering northwest 6 or 7, perhaps gale 8 later.
    • Sea State

      Slight or moderate, becoming moderate or rough.
    • Weather

      Showers, occasionally thundery.
    • Visibility

      Good, occasionally moderate.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      West 5 to 7, backing southeast 3 or 4 later.
    • Sea State

      Moderate or rough, becoming slight or moderate later.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

  16. The Minch * warning

    The Minch

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      Southwesterly becoming cyclonic, then westerly 4 or 5, veering northwesterly later, 5 or 6, occasionally 7 in south.
    • Sea State

      Smooth or slight in central areas until later, otherwise slight or moderate.
    • Weather

      Rain or showers, occasionally thundery.
    • Visibility

      Good, occasionally poor.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      Westerly or northwesterly 5 to 7, occasionally gale 8 for a time, becoming variable 3 or 4 later.
    • Sea State

      Slight or moderate, occasionally rough for a time in far south, becoming smooth in central areas.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

  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

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      Southwesterly becoming cyclonic, then westerly 4 or 5, veering northwesterly later, 5 or 6, occasionally 7 in south.
    • Sea State

      Moderate, occasionally rough.
    • Weather

      Rain or showers, occasionally thundery.
    • Visibility

      Good, occasionally poor.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      Westerly or northwesterly 5 to 7, occasionally gale 8 for a time, becoming variable 3 or 4 later.
    • Sea State

      Moderate or rough.
    • Weather

      Showers.
    • Visibility

      Good.

    Issued at 00:00 UTC on Friday 18th Aug

  18. Shetland Isles * warning

    Shetland Isles

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    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      Southerly backing southeasterly 3 or 4, occasionally 5 in southeast, then becoming cyclonic 4 or 5 later.
    • Sea State

      Moderate, occasionally rough at first.
    • Weather

      Showers, perhaps thundery later.
    • Visibility

      Good, occasionally moderate later.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      --
    • Sea State

      --
    • Weather

      --
    • Visibility

      --

    Issued at 00:00 UTC on Friday 18th Aug

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

    Gale Warnings in operation for Sea Area Fair Isle: Nil.

    00:00 UTC Fri 18th Aug – 11:59 UTC Fri 18th Aug

    • Wind

      Southerly backing southeasterly 3 or 4, occasionally 5 in southeast.
    • Sea State

      Moderate, occasionally rough at first.
    • Weather

      Showers.
    • Visibility

      Good.

    12:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      Southeasterly 3 or 4, occasionally 5 in southeast, becoming cyclonic 4 or 5, occasionally 6 later in far southeast.
    • Sea State

      Moderate.
    • Weather

      Showers, perhaps thundery.
    • Visibility

      Good, occasionally moderate.

    Issued at 00:00 UTC on Friday 18th Aug

  19. The Channel Islands * warning

    The Channel Islands

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    Strong wind warning

    00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

    • Wind

      Southwest to west 4 to 5, occasionally 6 early morning, veering west and increasing 5 to 6 by midday, perhaps with gusts to 35kt.
    • Sea State

      Slight to moderate, increasing moderate to rather rough by early afternoon, perhaps rough mid channel Friday evening.
    • Weather

      Isolated showers.
    • Visibility

      Good, perhaps occasionally moderate to poor.

    00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

    • Wind

      Westerly 5 to 6, perhaps with gusts to 35kt, decreasing 3 to 5 by mid morning, backing southwest Saturday evening.
    • Sea State

      Rather rough, perhaps rough mid channel until dawn, decreasing moderate in the morning, with a low swell.
    • Weather

      Isolated showers dying out in the morning.
    • Visibility

      Good, perhaps occasionally moderate.

    Issued at 00:00 UTC on Friday 18th Aug

Lyme Regis to Lands End including the Isles of Scilly

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Strong wind warning

00:00 UTC Fri 18th Aug – 23:59 UTC Fri 18th Aug

  • Wind

    West 5 to 7.
  • Sea State

    Slight or moderate, becoming moderate or rough later.
  • Weather

    Showers.
  • Visibility

    Good.

00:00 UTC Sat 19th Aug – 23:59 UTC Sat 19th Aug

  • Wind

    West 5 to 7, decreasing 3 or 4, then backing southwest 5 or 6 later.
  • Sea State

    Moderate or rough, becoming slight or moderate for a time.
  • Weather

    Showers at first.
  • Visibility

    Good.

Issued at 00:00 UTC on Friday 18th Aug