Irish National Tide Gauge Network

For the latest readings place your pointer over a  tide gauge icon.

Tide predictions are available here

  • Please note time is reported in UTC.
  • Inishmore is offline pending the completion of port development works.

The Irish National Tide Gauge Network is an on-going development involving the Marine Institute and a number of organisations in the public and private sectors to develop a permanent tidal monitoring infrastructure, ultimately consisting off between 35 and 40 stations. The project is currently entering year 5 of an anticipated 10 year programme.

The principle objectives are two fold:

  1. to involve local organisations (e.g. county councils) to assist them with local issues related to water level monitoring.
  2. to bring all operational tide gauges into a centrally managed national infrastructure.

Current activities include:

  • Strategic development of the network to work with new parties enabling the full resolution of the tidal regime around Ireland.
  • Roll out of GSM enabled data logging and telecommunications equipment for the central collection of data.
  • High precision site surveys to enable all data to be reported relative to the national datum (ordnance survey datum Malin Head).
  • Quality control of the stations to determine what outstanding work is required to get the best possible data.

The products from the network are wide-ranging and will be available as work progresses:

  • Real-time data to an Internet site to support recreational users, navigation and commercial activities.
  • Tidal predictions, both in the form of software tools and paper publications.
  • Flood warning.
  • Long term sea level variability.

For more information please contact us at
For detail about the meta data and real time FTP site access please see the information file.

Current active nodes on the Irish National Tide Gauge Network

(Updated 25/June/2010) 

 Gauge Location

 Gauge Owner(s)


Network Base Station

(Live 08 2006)

  Marine Institute  Operational 

Galway Port

(Live 16 03 2007)

Galway Port Company

Marine Institute


Inishmore (Cill Ronain Harbour)

(Live 06 04 2007)

 Galway County Council

 of port 
 Ballyglass Pier
 (Live 30 04 2008)
 Marine Institute


Killybegs Port

(Live 28 03 2007)


Marine Institute


 Árainn Mhór
 (Live 23 05 2008)
 Donegal County Council
 Marine Institute
 Malin Head
 (Live 13 03 2008)
 Office of Public Works
 Ordnance Survey of Ireland
 Met Eireann
 Marine Institute
 Dundalk Port
 (Live 04 04 2008)
 Dundalk Port
 Marine Institute  Operational
 Ballycotton Harbour
 (Live 07 10 2010)
 Ballycotton Harbour
 Marine Institute  Operational

Howth Harbour

(Live 25 10 2006)

Fingal County Council

Howth Harbour Office


Skerries Harbour

(Live 26 10 2006)

  Fingal County Council  Operational

Kish Bank Lighthouse

(Live 28 07 2006)

Dublin City Council

Commissioners for Irish Lights


Dublin Port (Alexander Basin)

(Live 13 02 2007)

Dublin City Council

Dublin Port Company


River Liffey

(Live 19 10 2006)

  Dublin City Council  Operational

River Dodder

(Live 20 10 2006)

  Dublin City Council  Operational

River Tolka

(Live 18 08 2010)

  Dublin City Council  Operational

Wexford Town

(Live 13 04 2007)

  Wexford Borough Council  Operational

Castletownbere (GLOSS)

(Live 5 12 2006)      


Marine Institute            

 Sligo (Rosses Point)
(Live  30 07 2008)
 Sligo County Council
 Marine Institute

































Please Note:

  • Not all stations are currently active on the web site as some engineering works are not yet complete.
  • GLOSS stands for Global Sea level Observing Station. For further information visit the GLOSS Website.

Target areas for new stations

We are consulting with all relevant parties far and wide as to where new stations should be. Attached is the current list of stations (Word, 22.5KB). Please get in touch if you (1) have any thoughts as to why stations should be added / removed and (2) if you wish to open discussions as to how we can get a water level station in place in your locality.

Tidal flows around Ireland

The spring tidal ranges experienced over the Celtic Seas region are shown in Figure 1A. In the open Atlantic tidal waves are generally small but they increase as they move eastwards across the shelf and are further enhanced by the funnelling effect of bays and estuaries. Thus, for example, halfway up the Shannon Estuary on Ireland's West Coast the average tide is 4.5m but at the head of the estuary it is almost 1m higher.

Tides around Ireland 

The general flow of tidal waves in Irish waters is shown in Figure 1(B). These propagate from both north and south, meeting just south-west of the Isle of Man at an amphidromic point (a point at which there is no variability in depth due to tidal activity). There is another amphidromic point south of Islay on the Malin Shelf.

Tidal ranges on the Malin Shelf from 0.5m on a neap tide (1m on a spring tide) in the Sound of Jura just south of the amphidromic point south of Islay, to 1.6m on a neap tide (4.5m on a spring). Further offshore and north of Skye the tidal range is reduced. Within the Irish Sea maximum tidal ranges occur on the Lancashire and Cumbria coasts where the mean spring tides have a range of 8m, contrasting with Carnsore Point on the south eastern Irish coast where the range is only 1.75m.

Recording tidal data in Ireland

In Ireland direct recording of changes in tidal elevation is on going in most Irish ports although up to now continuous records have been rare. Many Irish Port Authorities report tidal data to Proudman Oceanographic Laboratory at Birkenhead in the UK on an ongoing basis.
Proudman publishes tidal information on the web for selected UK & Irish ports. All data is checked and validated. Predictions are compared to observed data to ensure quality and accuracy.
The United Kingdom Hydrographic Office also produce tidal predictions for Irish coastal locations, as part of a global prediction system catering for over 4000 ports world wide. 73 ports, harbours, towns, cities, bays, quays and headland sites around Ireland are included.


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