Tide Predictions around Ireland

Data set information

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Data holding centreMarine Institute
CountryIreland  Ireland
Time periodAny time period requested but mainly 6 days in advance of present date up to 2 years into the future
Geographical area

Coastline around the Republic of Ireland


Sea level; Date and time


Sea level recorders; Ocean models


Tide prediction provides data that predict the ebb and flow of sea tides and any irregular variations in their heights. Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of the Earth. The times and amplitude of tides at any given locale are influenced by the alignment of the Sun and Moon, by the pattern of tides in the deep ocean, by the amphidromic systems of the oceans, and the shape of the coastline and near-shore bathymetry. Tidal predictions have been generated from measured data via the Irish National Tide Gauge Network and via modelled data from the Marine Institute operational hydrodynamic model. Tidal prediction was a calculation of future tide ranges based on available oceanographic parameters. Users can select a station and date and time within the next 2 years for the tidal prediction using the menus available. Water Level was sea surface height above local Lowest Astronomical Tide measured in metres. Tide predictions cover the coastline of the Republic of Ireland. Tide predictions have been completed for a day period up to 2 years into the future. Tide predictions for any period in the past can be requested. Tide predications have been derived from harmonic analysis of data measured at the tide gauges around the Irish coast (Irish National Tide Gauge Network Real Time Data). There are also predictions for a limited set of locations based on data obtained from the Marine Institute Regional Ocean Modelling System (ROMS) model (Ocean Forecasts). The tide predications have calculated the water level due to tidal forcing for a particular period in time. Storm surge due to atmospheric pressure and wind effects is not accounted for in these predictions. Tide predictions have been provided to understand the ebb and flow of tides particularly to support warning in an extreme weather event coastal flooding risk. Tide predictions have been run by the Oceanographic Services team within Ocean Science and Information Services section of the Marine Institute (Ireland). Data completed for any time period.

OriginatorsMarine Institute
Data web site
OrganisationMarine Institute
ContactKieran Lyons (Scientific and Technical Officer)

Marine Institute
Co. Galway
H91 R673

Collating centreMarine Institute
Local identifierOF.IE.MI.OSIS.TidePrediction
Global identifier6523
Last revised2017-12-04