Coast and sea

Extended outlook

Issued at: .

For the period to .

Extended outlook map

Cullercoats

On Thursday evening, a large area of high pressure is expected to be centred over, or near to west Shannon, around 1044, drifting slowly southeast. Through the period the high drifts further southeast, declining a little to be centred over southern England, or the English Channel around 1038, by the middle of the day on Sunday. Deeper areas of low pressure are mainly kept to the north of Iceland through this period. Near gale force winds are likely on Thursday evening in eastern-most sea areas. However, these are expected to ease into early Friday. During Friday, winds strengthen in the far northwest with near gales developing for Fair Isle. During Saturday gales are expected to become widespread across Fair Isle, extending into north Viking. Severe gales may affect north Fair isle for a time. Near gale or gale force winds may continue into Sunday for these northern-most sea areas, perhaps moderating later

Niton

On Thursday evening, a large area of high pressure is expected to be centred over, or near to west Shannon, around 1044, drifting slowly southeast. Through the period the high drifts further southeast, declining a little to be centred over southern England, or the English Channel around 1038, by the middle of the day on Sunday. The high is expected to be the dominant feature for Niton, with any deeper areas of low pressure being kept mainly to the north of Iceland, or to the west over the mid North Atlantic through this period. Near gale or gale force winds may develop from Thursday evening into Friday in south Fitzroy, mainly near Cape Finisterre. These winds are then expected to gradually moderate again through Saturday and Sunday. No other hazardous winds are expected to affect Niton during this period, at the current time

Portpatrick

On Thursday evening, a large area of high pressure is expected to be centred over, or near to west Shannon, around 1044, drifting slowly southeast. Through the period the high drifts further southeast, declining a little to be centred over southern England, or the English Channel around 1038, by the middle of the day on Sunday. Deeper areas of low pressure are mainly kept to the north of Iceland through this period. Gales are likely to develop later on Friday for sea areas Southeast Iceland, Bailey and north Faeroes. Gales are then expected to become widespread during Saturday, mainly to the north of 59 north, with severe gales likely to develop across Southeast Iceland, Bailey and Faeroes, perhaps reaching storm force for a time in Southeast Iceland. On Sunday wind are likely to moderate but gales will most probably continue across Southeast Iceland

The extended outlook information

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.

Marine forecasts disclaimer

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.