Use of this site is subject to the disclaimer on the Home page.
Only data for the past 5 weeks are shown.
Times are always shown in GMT. Levels are relative to the bottom of the staff gauge at each station, not to a common datum. Actual levels to Ordnance datum may be checked for individual stations, however users should note that two datums are in use. Malin Head datum is a mean sea level datum, Poolbeg datum is a low water datum. An approximate correction is Malin + 2.7m ~ Poolbeg.
To use the graph:
Zoom in: click and drag a horizontal or vertical box.
Zoom full: double click.
Smooth data: change roll period (text box bottom left of chart), from 1 to e.g. 24.
Graph by: Dygraphs