Inshore Waters
Valid
From: Mon 20th Sep at 12:00 UTC
To: Tue 21st Sep at 12:00 UTC
Summary
A ridge of high pressure will build across central and southern parts of the British Isles. However deep areas of low pressure moving past Iceland will bring unsettled conditions and strong winds at times to the far north, with a risk of gales on Tuesday.
Issued at: 12:00 UTC on 20th Sep
Regions
From Cape Wrath to Rattray Head including Orkney
Back to Top24 hour forecast:
Wind
West or southwest 4 to 6, occasionally 3 at first near Aberdeenshire, increasing 7 at times near Cape Wrath.
Sea State
Smooth or slight in Moray Firth, otherwise slight or moderate, but becoming rough or very rough to the west and north of Orkney.
Weather
Fair, then rain or showers.
Visibility
Moderate or good, occasionally poor.
Outlook for the following 24 hours:
Wind
West or southwest 4 to 6, increasing 7 or gale 8 for a time, and occasionally severe gale 9 for a time near Cape Wrath.
Sea State
Rough or very rough to the west and north of Orkney, elsewhere mainly slight or moderate, but becoming smooth or slight later in Moray Firth.
Weather
Showers, occasional drizzle later.
Visibility
Moderate or good.
Rattray Head to Berwick on Tweed
Back to Top24 hour forecast:
Wind
West or southwest 3 to 5.
Sea State
Slight or moderate, becoming slight.
Weather
Mainly fair.
Visibility
Good.
Outlook for the following 24 hours:
Wind
Southwest 4 to 6, occasionally 7 later.
Sea State
Slight, becoming moderate except in far south.
Weather
Fair.
Visibility
Good.
Berwick on Tweed to Whitby
Back to Top24 hour forecast:
Wind
Variable 2 to 4, becoming west 3 to 5 for a time.
Sea State
Slight, occasionally smooth later.
Weather
Mainly fair.
Visibility
Good.
Outlook for the following 24 hours:
Wind
Variable 2 to 4 becoming southwest 3 to 5, occasionally 6 later.
Sea State
Slight, occasionally smooth.
Weather
Fair.
Visibility
Good.
Whitby to Gibraltar Point
Back to Top24 hour forecast:
Wind
North or northwest 3 to 5 becoming variable 3 or less, then occasionally 4 again later.
Sea State
Slight, occasionally smooth in south.
Weather
Showers then fair.
Visibility
Good, occasionally moderate.
Outlook for the following 24 hours:
Wind
Variable 3 or less becoming west or southwest 3 to 5.
Sea State
Smooth or slight.
Weather
Fair.
Visibility
Good.
Gibraltar Point to North Foreland
Back to Top24 hour forecast:
Wind
Variable 3 or less, increasing 4 at times.
Sea State
Slight, becoming smooth or slight.
Weather
Showers then fair.
Visibility
Good, occasionally moderate.
Outlook for the following 24 hours:
Wind
Variable 3 or less becoming southwesterly 3 or 4.
Sea State
Smooth or slight.
Weather
Fair.
Visibility
Good.
North Foreland to Selsey Bill
Back to Top24 hour forecast:
Wind
Northerly or northeasterly 3 or 4, occasionally 5 at first in east, becoming variable 3 or less later.
Sea State
Slight, becoming smooth or slight later.
Weather
Showers then fair.
Visibility
Good, occasionally moderate at first.
Outlook for the following 24 hours:
Wind
Variable 3 or less, occasionally 4 later in east.
Sea State
Smooth or slight.
Weather
Fair.
Visibility
Good.
Selsey Bill to Lyme Regis
Back to Top24 hour forecast:
Wind
North or northeast 3 or 4, becoming variable 3 or less later.
Sea State
Slight, becoming smooth or slight.
Weather
Fair.
Visibility
Good.
Outlook for the following 24 hours:
Wind
Variable 3 or less.
Sea State
Smooth or slight.
Weather
Fair.
Visibility
Good.
Lyme Regis to Lands End including the Isles of Scilly
Back to Top24 hour forecast:
Wind
North 3 or 4, occasionally variable 2 at first, then becoming variable mainly northeast 3 or less later.
Sea State
Smooth or slight in east, slight or moderate in west.
Weather
Showers in far west.
Visibility
Good.
Outlook for the following 24 hours:
Wind
Variable 3 or less.
Sea State
Smooth or slight in east, slight or moderate in west.
Weather
Fair.
Visibility
Good.
Lands End to St Davids Head including the Bristol Channel
Back to Top24 hour forecast:
Wind
North or northwest 3 to 5 becoming variable 3 or less.
Sea State
Slight or moderate, becoming smooth or slight later in east.
Weather
Showers in far west.
Visibility
Good.
Outlook for the following 24 hours:
Wind
Variable 3 or less, becoming west or southwest 2 to 4 later.
Sea State
Slight or moderate near Cornwall, but elsewhere smooth or slight.
Weather
Fair.
Visibility
Good.
St Davids Head to Great Ormes Head, including St Georges Channel
Back to Top24 hour forecast:
Wind
Variable, but mainly northwest at first and southwest later, 3 or less, increasing 4 at times.
Sea State
Slight or moderate at first in south, otherwise smooth or slight.
Weather
Showers for a time.
Visibility
Good.
Outlook for the following 24 hours:
Wind
Westerly 2 or 3 at first in south, otherwise southwesterly 3 or 4, occasionally 5 later in north.
Sea State
Smooth or slight, becoming slight or moderate later.
Weather
Fair.
Visibility
Good.
Great Ormes Head to the Mull of Galloway
Back to Top24 hour forecast:
Wind
Variable becoming west or northwest, then backing west or southwest later, 2 to 4.
Sea State
Smooth, occasionally slight.
Weather
Showers for a time.
Visibility
Good.
Outlook for the following 24 hours:
Wind
Westerly or southwesterly 3 to 5, occasionally 2 at first in Liverpool Bay, increasing 6 at times later in north.
Sea State
Smooth or slight, becoming slight or moderate except in Liverpool Bay.
Weather
Fair.
Visibility
Good.
Isle of Man
Back to Top24 hour forecast:
Wind
West or southwest, veering northwest for a time, 2 to 4.
Sea State
Smooth or slight.
Weather
Fair.
Visibility
Good.
Outlook for the following 24 hours:
Wind
Southwest 4 or 5, occasionally 3 at first, increasing 6 at times later.
Sea State
Smooth or slight becoming slight or moderate.
Weather
Fair.
Visibility
Good.
Lough Foyle to Carlingford Lough
Back to Top24 hour forecast:
Wind
West or southwest 3 or 4, occasionally 2 at first, increasing 5 at times later.
Sea State
In far north, slight or moderate becoming moderate or rough, but elsewhere smooth or slight.
Weather
Showers then fair.
Visibility
Good, occasionally moderate.
Outlook for the following 24 hours:
Wind
Southwest 3 to 5, occasionally 6 later.
Sea State
Moderate or rough in far north, but elsewhere smooth or slight becoming slight or moderate.
Weather
Occasional drizzle for a time.
Visibility
Good, occasionally moderate.
The Mull of Galloway to Mull of Kintyre including the Firth of Clyde and the North Channel
Back to Top24 hour forecast:
Wind
Westerly or southwesterly 2 to 4, occasionally 5 at first.
Sea State
Smooth or slight, occasionally moderate near the Mull of Kintyre.
Weather
Showers then fair.
Visibility
Good, occasionally moderate.
Outlook for the following 24 hours:
Wind
Southerly or southwesterly 4 or 5, occasionally 3 at first, increasing 6 at times later.
Sea State
Moderate or rough near the Mull of Kintyre, but elsewhere smooth or slight becoming slight or moderate.
Weather
Occasional drizzle for a time.
Visibility
Good, occasionally moderate.
Mull of Kintyre to Ardnamurchan Point
Back to Top24 hour forecast:
Wind
Southwesterly 3 to 5, veering westerly 2 to 4 for a time, then occasionally 6 later in far north.
Sea State
Slight or moderate, becoming moderate or rough except in shelter.
Weather
Drizzle at times then showers.
Visibility
Good, occasionally moderate at first.
Outlook for the following 24 hours:
Wind
Southerly or southwesterly 4 to 6, increasing 7 or gale 8 for a time in north.
Sea State
Slight at first in shelter, otherwise moderate or rough, becoming rough or very rough later.
Weather
Occasional drizzle.
Visibility
Good, occasionally poor.
The Minch
Back to Top24 hour forecast:
Wind
Southwesterly, veering westerly for a time, 4 to 6, occasionally 7 later in north.
Sea State
Slight or moderate, occasionally smooth until later just north of Skye, then becoming rough later in far north.
Weather
Drizzle at times, then showers.
Visibility
Good, occasionally moderate.
Outlook for the following 24 hours:
Wind
Southwesterly 6 to gale 8, occasionally 5 at first in south, then increasing severe gale 9 at times in north, veering westerly 3 to 5 later.
Sea State
Moderate or rough in north, west and south, but slight or moderate in east and just north of Skye.
Weather
Occasional drizzle.
Visibility
Good, occasionally poor.
Ardnamurchan Point to Cape Wrath including the Outer Hebrides
Back to Top24 hour forecast:
Wind
Southwesterly, veering westerly for a time, 4 to 6, occasionally 7 at first near Cape Wrath, and then later elsewhere in north.
Sea State
Moderate or rough becoming rough or very rough.
Weather
Drizzle at times, then showers.
Visibility
Good, occasionally moderate.
Outlook for the following 24 hours:
Wind
Southwesterly 6 to gale 8, occasionally severe gale 9 in north, veering westerly 4 to 6 later.
Sea State
Rough or very rough.
Weather
Occasional drizzle.
Visibility
Good, occasionally poor.
Shetland Isles
Back to Top24 hour forecast:
Wind
Southerly veering westerly or southwesterly, 5 or 6, occasionally 7 until later in north, decreasing 4 at times later in south.
Sea State
Moderate or rough, becoming rough or very rough later in north, west and south, but becoming slight or moderate in east.
Weather
Rain then showers, becoming mainly fair later.
Visibility
Good, occasionally moderate.
For Coastal areas up to 60 nautical miles from Lerwick, Shetland
Back to TopValid Monday 20 Sep 2021 at 1200 UTC until Tuesday 21 Sep 2021 at 0000 UTC
General situation:
Deep area of low pressure will move northeastwards across Iceland during Monday. Associated trough will cross Shetland Waters with a ridge building behind on Tuesday.
Forecast:
Wind
Southerly or southwesterly 5 or 6, occasionally 7 in the north.
Sea State
Moderate or rough, becoming very rough later in the west.
Weather
Rain then showers.
Visibility
Good, occasionally moderate.
Outlook for 12 Hours from 0000 UTC on Tuesday 21 Sep until 1200 UTC on Tuesday 21 Sep:
Wind
Westerly or southwesterly 5 or 6, occasionally 7 at first in the north.
Sea State
Rough or very rough, occasionally moderate in the east at first.
Weather
Mainly fair.
Visibility
Mainly good.
The Channel Islands
Back to Top24 hour forecast:
Wind
North or northwest 3 or 4, locally 5 until dusk, veering north or northeast 2 to 4 overnight, then becoming locally east or variable after dawn.
Sea State
Slight, occasionally smooth after dawn, with a low swell.
Weather
Fair.
Visibility
Good.
Outlook for the following 24 hours:
Wind
Northeast 2 to 4, becoming locally variable 2 or 3, mainly after dusk.
Sea State
Smooth locally slight, with a low swell.
Weather
Fair.
Visibility
Good.
Inshore Waters information supplied by the Met Office on behalf of the Maritime and Coastguard Agency (MCA).
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