High Tide Advisory issued by the OPW


The OPW wish to advise that there will be a period of very high storm surge which may result in sea levels approaching or exceeding Highest Astronomical Tide (HAT) in the coastal areas show below from 12:00 (Noon), Wednesday 10th until 12:00 (Noon) Thursday 11th March 2021.

Whilst storm surge levels are currently relatively low in all coastal areas, they are predicted to increase significantly as follows, from 12:00 today until 12:00 Thursday, in the coastal areas shown below:

  • 0.75m at Lough Swilly
  • 0.75m at Donegal Bay
  • 0.70m at Sligo
  • 0.70m at Killala
  • 0.70m at Clew Bay
  • 0.60m at Roundstone
  • 0.85m at Galway Bay
  • 0.70m at Shannon Estuary
  • 0.40m at Dingle Bay
  • 0.25m at Bantry Bay
  • 0.20m at Cork Harbour
  • 0.45m at Waterford Estuary
  • 0.30m at Wexford Harbour
  • 0.55m at Arklow
  • 0.65m at Wicklow
  • 0.70m at Dublin Bay
  • 0.75m at Drogheda
  • 0.90m at Dundalk Bay

As these forecasts of storm surge may change, you are therefore advised to monitor closely surge and sea level forecasts throughout this notice period (from noon on Wednesday 10th to noon on Thursday 11th March).

High tide in Dundalk is due on Wednesday at 22:15 tonight and at 10:25 on Thursday morning and may impact on businesses with low lying premises.

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