Over 34,000 homes and businesses are reported to have suffered power outages due to Storm Kathleen, as southerly to south-westerly gale force winds swept across the western seaboard.
In Galway, the sea breached the Salthill promenade, flooding the Toft carpark and the Seapoint area close to the Atlantaquaria.
Galway City Council crews were on standby, the Salthill promenade road was closed, and fears of further damage were allayed when the southerly winds veered south-west before high tide.
Ferries, flights and trains have all been disrupted, and status Orange weather warnings issued by Met Éireann remained in effect on Saturday evening in counties Kerry, Cork, Galway and Mayo.
ESB Networks said it expected further power outages, and crews were responding where safe to do so.
In Belfast, the Titanic Belfast centre was closed when the roof was damaged by high winds.
Belfast Harbour Police set up cordons around the building and visitors were escorted out via a side door.
Titanic Belfast said in a statement that it had taken the precautionary measure to close the building to the public for the remainder of the weekend.
