Irish National Tide Gauge Network

Skerries Harbour Kish Bank Lighthouse 1 River Dodder River Liffey Dublin Port Howth Harbour Castletownbere Marine Institute Base Station Killybegs Port Galway Port Inishmore Ballycotton River Tolka Wexford Town Ballyglass Sligo Malin Head Dundalk Aranmore Dunmore

Tide predictions are available here

GaugeLatest ReadingWater LevelTemperatureAtm. Pressure
MetresDegrees CentigradeMillibars
Aranmore 28 Jul 20:001.26417.2001020.000
Ballycotton 28 Jul 20:00.89217.5001020.800
Ballyglass 28 Jul 19:001.49716.9001017.400
Castletownbere 28 Jul 19:45.25018.5001021.000
Dunmore 28 Jul 20:00.96016.2001019.900
Galway Port 28 Jul 20:00.904n/a1020.000
Howth Harbour 28 Jul 20:00-.950n/an/a
Killybegs Port 28 Jul 20:001.31014.3001018.000
Kish Bank Lighthouse 1 28 Jul 18:54.720n/a1016.000
Malin Head 28 Jul 20:001.183n/a1016.100
Newport - Black River 28 Jul 08:00.24015.000n/a
Newport - Glendahurk 28 Jul 20:00.21718.300n/a
Newport - Mill Race 28 Jul 20:00.36619.200n/a
Newport - Tarsaghaun 28 Jul 20:00.17217.500n/a
River Liffey 28 Jul 20:00-.982n/an/a
River Tolka 28 Jul 20:00-.207n/an/a
Rye Water - Leixlip 28 Jul 20:00.177n/an/a
Skerries Harbour 28 Jul 20:00-.89020.4401019.000
Wexford 28 Jul 20:00.58819.2001021.000
Click on each value above to view the graph for the last 24 hours.
Please note time is reported in UTC.
Datum information and units: All water levels are reported in metres.
All levels are reported relative to Ordinance Datum Malin Head (except the Kish bank Lighthouse which is relative to a local datum as the OD Malin Head offset has yet to be determined offshore).
Dublin Port Data subject to Confirmation of Survey

Link to SERPRISE website

Link to SEPRISE website


IMOS Version

Welcome to the Irish National Tide Gauge Network - this 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 program. 

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.

This infrastructure has been part funded under the Marine RTDI Measure of the National Development Plan 2000-2006, co-funded by the European Regional Development Fund (ERDF).

Please see here for information on the specification of the INTGN installations.

ERDF Logo NDP Logo Seachange Logo

Current active nodes on the Irish National Tide Gauge Network

(updated 19th October 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

Offline during Pier works 

Ballyglass Pier

(Live 30 04 2008)

Marine Institute


Killybegs Port

(Live 28 03 2007)

Marine Institute


Árainn Mhór Island

(Live 23 05 2008)

Donegal County Council

Marine Institute

 Offline - under repair

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   


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  Offline - under repair

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


Dunmore East

(Live  25 04 2012    )

 Department of Agriculture, Food and the Marine    











































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. Please see


Target areas for new stations

We are consulting with all relevant parties far and wide as to where new stations should be and the following is the current list. This is live so 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.

Gauge Location     Longitude  Latitude
 Letterfrack  53.55976  -9.99876
 Achill Island  53.96374  -10.0990
 Clare Island  53.800341  -9.948870
 Killary Harbour  53.62054  -9.85992
 Tory Island  55.262814  -8.219423
 Carrownaff (Lough Foyle)  55.181300  -7.056447
 Bray Harbour  53.206143  -6.100199
 Wicklow Town  52.981478  -6.034897
 Arklow  52.793141  -6.137448
 Rosslare Port  52.253731  -6.33182 
 Dungarvan  52.08437  -7.11191
 Cobh  51.851142  -8.279935
 Kinsale  51.701054  -8.51840
 Cork City Centre  51.900430  -8.472896
 River Lee (Cork City upper)  51.898263  -8.484099
 Crosshaven  51.804526  -8.300160
 Carigaline  51.813203  -8.392538
 Union Hall  51.558864  -9.140062
 Dingle Harbour  52.13753  -10.275997
 Shannon Foynes  52.586903  -9.358354
 Shannon  52.698557  -8.885405
 Lahinch  52.930920  -9.346024
 Fenit  52.281563  -9.865994


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.

In this section:

Wave Modelling
Tide Predictions
Introduction to Oceanography
European COastal-shelf sea OPerational observing and forecasting system (ECOOP)
Irish Marine Weather Buoy Network
Model Validation
Wave Forecasts
Ocean Model Simulations
Equipment Pool
Oceanographic Data Management
Ocean Forecast