Coast and sea

Extended outlook

Issued at: .

For the period to .

Extended outlook map

Cullercoats

The Azores high pressure 1023 will extend a ridge across the British Isles during Monday evening and Tuesday morning, then weaken southwards later Tuesday. A low pressure area will be located over Scandinavia at first, but then move eastwards as pressure rises. A deepening area of low pressure 966, moving northeastwards across Iceland, will extend frontal troughs to northern Britain later Tuesday. Low pressure, filling to 981, will move southwards towards Faeroes during Wednesday with cyclonic conditions developing across most sea areas, then becoming located over Scotland during Thursday. Northwesterly winds will be widely strong during Monday evening and Tuesday, but moderating through the day. Strong southwesterly winds will develop in the north later Tuesday, with occasional gales in northernmost sea areas. Strong winds will develop more widely through Wednesday and Thursday with near gales or occasional gales possible near blustery showers on Thursday

Niton

The Azores high pressure 1023 will extend a ridge across the British Isles during Monday evening and Tuesday morning, then weaken southwards later Tuesday. A low pressure area will be located over Scandinavia at first, but then move eastwards as pressure rises. A deepening area of low pressure 966, moving northeastwards across Iceland, will extend frontal troughs to northern Britain later Tuesday. Low pressure, filling to 981, will move southwards towards Faeroes during Wednesday with cyclonic conditions developing across most sea areas, then becoming located over Scotland during Thursday. Winds will be occasionally strong in northern sea areas, and South Fitzroy, through Monday evening and Tuesday morning, tending to moderate through Tuesday. Strong westerly winds will return to Shannon later Tuesday, then spread to other seas through Wednesday, increasing to gale in West Sole and Shannon. Occasional gales are possible more widely on Thursday

Portpatrick

The Azores high pressure 1023 will extend a ridge across the British Isles during Monday evening and Tuesday morning, then weaken southwards later Tuesday. A low pressure area will be located over Scandinavia at first, but then move eastwards as pressure rises. A deepening area of low pressure 966, moving northeastwards across Iceland, will extend frontal troughs to northern Britain later Tuesday. Low pressure, filling to 981, will move southwards towards Faeroes during Wednesday with cyclonic conditions developing across most sea areas, then becoming located over Scotland during Thursday. Strong winds in the south, and Fair Isle during Monday evening, will tend to moderate through Tuesday. Strong southwesterly winds, then gales, will spread across northern sea areas during Tuesday, with gales spreading as far south as Rockall and Malin, perhaps severe gales in Southeast Iceland. Occasional gales are expected in Atlantic sea areas during Wednesday and Thursday, possibly also Lundy and Irish Sea, but reducing confidence in detail

The extended outlooks are issued once a day, at 2300 GMT and cover the next 3 to 5 days.

For the extended outlooks the waters surrounding the British Isles are divided into three areas: Cullercoats, Portpatrick and Niton. These three areas reflect the coverage areas of the UK's Navtex transmitters, which overlap in some areas.

The extended outlook forecast contains details of the likelihood of gales or storms, a general synopsis and a general forecast for the area of coverage of each Navtex transmitter.

In the UK, the Maritime & Coastguard Agency (MCA) is responsible for the provision of Maritime Safety Information (MSI) to ships at sea, which includes the broadcast of warnings and forecasts. The Met Office initiates warnings and prepares routine forecasts for dissemination on behalf of the MCA.

Caution: The internet is not part of the Maritime Safety Information system and should never be relied upon as the only means to obtain the latest forecast and warning information. Access to the service may be interrupted or delayed from time to time, updates may also be delayed.

Please refer to GMDSS services, INMARSAT SafetyNET or international NAVTEX for the latest information. When using these web pages, always check that the page on your screen is not from your cache. Use the Refresh or Reload button if in any doubt.