Wind energy provided 35% of Ireland‘s electricity in September 2025, a new record for the month, Wind Energy Ireland has revealed.
According to Wind Energy Ireland, which revealed the findings to coincide with the Wind Energy Expo 2025 at the RDS in Dublin, solar and other renewables provided 7% of the country’s electricity last month, giving renewables a total share of 42%.
Overall, wind generation in Ireland totalled around 1,129 gigawatt-hours (GWh) in September, with Kerry the top-performing county, generating 129 GWh. This was followed by Cork (117 GWh), Galway (95 GWh), Derry (77 GWh) and Mayo (71 GWh).
The average wholesale price of electricity in Ireland was €94.48 per MWh in September, down from €112.73 during the same month last year, and a slight drop from the €96.38 recorded in August 2025, Wind Energy Ireland added.
‘Number one source’
“Wind energy is our number one source of renewable energy,” commented Noel Cunniffe, CEO of Wind Energy Ireland. “Renewables provided over 40 per cent of our electricity last month and that figure is set to rise as we build more wind and solar farms.
“The more wind energy that we produce here in Ireland, the more we can secure our own supply of clean, affordable electricity and reduce the need to import expensive fossil fuels. 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.”
As the group noted, particularly windy days saw the average cost of a megawatt-hour of electricity fall to €62.01 per megawatt hour. This compares to €117.37 per megawatt-hour on days in which Ireland relied almost entirely on fossil fuels.
Budget 2026 measures
Cunniffe welcomed the recent announcement in Budget 2026 of investment to support the development of Ireland’s offshore wind resources, as well as efforts to increase capacity within key state agencies.
“Ensuring we have the right people, expertise and resources in place to deliver more clean, affordable energy for communities across Ireland is essential,” he added. “The Government’s Budget for 2026 provides the confidence that the necessary funding will be available to help grow our renewable energy sector.
“The investment to support the development of Ireland’s national DMAP, along with additional funding to increase capacity within our State agencies, will help transform our electricity system and accelerate the delivery of clean, affordable and secure energy for Irish families and businesses.” Read more here.
