Coast and sea

High seas forecast and storm warnings

The general synopsis for UK

At 120000UTC, low 53 north 25 west 996 expected 53 north 13 west 1003 by midnight tonight. New low expected 50 north 20 west 1004 and 72 north 13 west 999. New high expected 64 north 31 west 1017 by that time

Issued at: 08:00 (UTC) on Thu 12 Jun 2025.

For the period 08:00 (UTC) on Thu 12 Jun 2025 to 08:00 (UTC) on Fri 13 Jun 2025.

High seas forecast and storm warnings map

High seas forecast and storm warnings explained

Sole

Wind: Cyclonic 4 to 6.
Sea state: Moderate or rough.
Weather: Thundery showers.
Visibility: Good, occasionally poor.

Shannon

Wind: Cyclonic 3 to 5.
Sea state: Moderate or rough.
Weather: Rain at times, fog patches.
Visibility: Moderate to very poor.

Rockall

Wind: Cyclonic 3 to 5.
Sea state: Moderate or rough.
Weather: Rain at times, fog patches.
Visibility: Moderate to very poor.

Bailey

Wind: South or southeast 4 to 6, becoming variable 2 to 4.
Sea state: Moderate or rough , becoming slight or moderate later.
Weather: Rain or showers, fog patches.
Visibility: Moderate or good, occasionally very poor.

Faeroes

Wind: South or southeast 4 to 6.
Sea state: Moderate or rough.
Weather: Occasional rain, fog patches.
Visibility: Moderate or good, occasionally very poor.

Southeast Iceland

Wind: Southerly 4 or 5 at first in east, otherwise variable 2 to 4, becoming northeasterly 4 to 6 later.
Sea state: Rough becoming moderate.
Weather: Rain, fog patches, becoming mainly fair in northwest.
Visibility: Moderate or good, occasionally very poor.

East Northern Section

Wind: Cyclonic becoming mainly northerly or northeasterly, 3 to 5.
Sea state: Rough becoming moderate, occasionally slight later in north.
Weather: Occasional rain with fog patches in far east, showers elsewhere.
Visibility: Moderate or good, occasionally very poor in far east.

West Northern Section

Wind: Northerly or northeasterly 3 to 5 at first in east, otherwise variable 2 to 4.
Sea state: Moderate or rough, becoming slight or moderate in north.
Weather: Showers at first in east, otherwise fair, then occasional rain later in south.
Visibility: Moderate or good, occasionally poor.

East Central Section

Wind: Cyclonic 4 to 6, occasionally 3 in east.
Sea state: Rough or very rough becoming moderate or rough.
Weather: Showers, squally at times.
Visibility: Good, occasionally poor.

West Central Section

Wind: Northwesterly, backing southerly or southwesterly in west, 4 to 6.
Sea state: Moderate or rough, occasionally very rough at first in east.
Weather: Showers at first in east, otherwise mainly fair, then rain and fog patches later in west.
Visibility: Moderate or good, occasionally very poor later in west.

Denmark Strait

Wind: Cyclonic, mainly northerly in east, 4 to 6, increasing 6 to gale 8 for a time in east, becoming variable 2 to 4 in west and later also south, then becoming westerly or southwesterly 3 to 5 later in north.
Sea state: Slight or moderate.
Weather: Occasional rain, sleet and snow until later in east, fog patches near greenland.
Visibility: Moderate or good, occasionally poor in east and very poor near greenland.

North Iceland

In north

Wind: Variable 2 to 4, becoming easterly or southeasterly 5 to 7 in south, then cyclonic 4 to 6 later.
Sea state: Slight or moderate, becoming moderate or rough in south and later elsewhere.
Weather: Fog patches, occasional rain, sleet and snow in south and later also in north.
Visibility: Moderate or good, occasionally very poor.

In south

Wind: Easterly or southeasterly 5 to 7, becoming cyclonic 4 to 6, then westerly or northwesterly 5 to 7 later.
Sea state: Moderate or rough.
Weather: Rain at times, fog patches.
Visibility: Moderate or good, occasionally very poor.

Norwegian Basin

Wind: Southeasterly veering southerly later, 4 to 6.
Sea state: Slight at first in east, otherwise moderate or rough.
Weather: Rain at times in west.
Visibility: Good, occasionally poor in west.

Outlook for following 24 hours

Gales expected in north Iceland.

Unscheduled storm warnings are broadcast via Safetynet and in bulletin WONT54 EGRR available via some internet and ftpmail outlets

The high seas forecast information

High seas forecasts are issued twice daily at 0930 and 2130 GMT and cover the next 24 hours and outlooks for the following 24 hours.

The part of the North Atlantic known as Metarea I is divided into twelve sea areas, six of which are also in the Shipping forecast.

The high seas forecast contains a general synopsis and sea-area forecasts containing forecast wind direction and force, weather and visibility for the next 24 hours with an outlook for the following 24 hours.

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.