Wind farms supplied 36% of Ireland’s electricity in October, with total renewables reaching 41%, according to Wind Energy Ireland.
Wind output reached around 1229GWh last month, the organisation said.
Kerry led county-level production on 156GWh, followed by Cork on 144GWh, Galway on 84GWh, Derry on 83GWh and Tipperary on 80GWh.
The average wholesale electricity price was €100.70/MWh in October, compared to €123.45/MWh a year earlier.
Noel Cunniffe (pictured), chief executive of Wind Energy Ireland, said: “We are fortunate in Ireland to have natural resources like wind that can generate more affordable, clean electricity to power our local communities.”
He said: “It is great to see that renewables once again provided over 40 per cent of the country’s electricity last month, with wind farms accounting for the vast majority of that power.”
He added: “Rather than importing hundreds of millions of euros of gas, Irish wind farms ensure money stays where it belongs, at home, supporting Irish workers and businesses.”
The group said prices fell to €55.84/MWh on the windiest days and rose to €137.98/MWh when fossil fuels dominated supply.
Cunniffe said: “Whenever a wind turbine generates electricity, it pushes down wholesale electricity prices, helping to protect consumers.”
He said: “Our findings show that on the windiest days last month, wholesale electricity prices were less than half of what they were on days when we had to rely on imported fossil fuels.”
He added: “Having affordable and reliable sources of clean energy is vital for consumers to have confidence in our transition to a zero-carbon society.”
WEI warned that An Coimisiún Pleanála approved only one new wind farm between July and September.
The organisation said the planning backlog now exceeds 2000MW of onshore wind capacity.
Cunniffe said: “To deliver more affordable, clean electricity for homes and businesses across Ireland, we need to work together to get wind farms through the planning system faster and to reinforce our electricity grid.”
He added: “It is disappointing that quarters two and three of this year have been poor for planning decisions on renewable energy projects from An Coimisiún Pleanála.”
He said: “It is critical that we build back up the momentum through the final quarter of 2025 so that we can see more renewable energy projects getting into construction and providing the clean power our country needs.”