Wind farms provided 33% of Ireland's electricity in 2025, with the country now operating over 5,000 megawatts of onshore wind capacity, Wind Energy Ireland announced.

RTÉ reported that the industry body's annual report shows wind generation supplied a third of the nation's power throughout 2025, with December recording particularly strong performance at 39%. Solar power and other renewables contributed an additional 4%, bringing total renewable electricity share to 43% for the month.

Wind generation reached 1,523 gigawatt-hours in December, marking the second highest December on record. The figure fell just short of the 1,819 gigawatt-hour record set in December 2023.

The report revealed a clear correlation between wind power availability and electricity costs. On days with the highest wind power generation, the average cost of a megawatt-hour of electricity fell to €76.41 (£64.89). However, on days when the country relied almost entirely on fossil fuels, costs rose to €148.55 (£126.14).

Ireland currently has 450 megawatts of onshore wind capacity under construction, with an additional 2,500 megawatts of projects holding planning permission. The pipeline represents significant potential expansion of the country's wind energy infrastructure over the coming years.

Noel Cunniffe, chief executive of Wind Energy Ireland, said the country now has over 5,000 megawatts of onshore wind energy operational. He added that by building more wind farms, strengthening the electricity grid, adding more storage and electrifying the economy, Ireland can build an electrostate where secure, clean and affordable power creates new opportunities.

The figures come as Ireland works towards its renewable electricity targets for 2030. Industry observers note that the continued development of wind capacity will be crucial for meeting the country's climate commitments and reducing dependence on fossil fuel imports.

Explore the full annual report and generation data.