New figures published today show that Irish wind farms provided a third of the island of Ireland's electricity in 2025.
Wind Energy Ireland's annual wind energy report also reveals that the Republic of Ireland now has more than 5,000 MW of installed onshore wind capacity, with 150 MW added last year.
Today's report shows that wind farms delivered around 13,634 GWh of clean electricity last year, with Kerry leading the country as the top-producing county for wind power, followed by Cork and Galway.
Wind Energy Ireland said that December saw a strong finish to 2025, with wind farms providing 39% of the country's electricity while solar power and other renewables provided an additional 4% for a total renewable share of 43%.
Wind generation also hit 1,523 GWh last month, marking the second highest December on record and just short of the 1,819 GWh record set in 2023.
Today's report noted that on days with the most wind power the average cost of a megawatt-hour of electricity fell to €76.41 but rose to €148.55 on days when the country relied almost entirely on fossil fuels.
Noel Cunniffe, CEO of Wind Energy Ireland, said that Ireland now has over 5,000 MW of onshore wind energy with a further 450MW in construction and 2,500 MW of projects with planning permission.
"By building more wind farms, strengthening our electricity grid, adding more storage and electrifying our economy, we can build an Irish electrostate where secure, clean, affordable power creates new opportunities right across the economy," he said.
But he noted that 13% of the country's cheapest electricity was wasted last year because the existing grid was simply not strong enough to carry all the power that Irish wind farms produced for homes and businesses.
"Making the electricity grid strong enough to accommodate increasing volumes of affordable energy is essential. Building out energy storage infrastructure will also be important so that we can save excess renewable energy for when we need it," he said.
