Irish wind farms generated 1,256 gigawatt-hours (GWh) of electricity in September, a record for the month, and supplied 37 per cent of the country's electricity demand, according to Wind Energy Ireland's latest monthly report.
The figure beat the previous September record of 1,128 GWh, set last year, and is an increase of 11 per cent. Over the first nine months of 2026, wind farms supplied more than a third of Ireland's electricity.
Prices were lower on the windiest days
The average wholesale electricity price in September rose to €182.13 per megawatt-hour (MWh) on the back of steadily rising gas prices. On the days with the most wind generation, the average fell to €142.78 per MWh. On days when the country had to depend on imported gas, it reached €226.51 per MWh, almost 25 per cent above the monthly average. The report says wholesale prices were more than a third lower on the days with the most wind power.
Noel Cunniffe, CEO of Wind Energy Ireland, said prices were almost €84 lower on the windiest days than on days that relied on imported gas. He called September "the best September on record for wind energy" and said wind and solar together met over 42 per cent of demand.
County figures
Kerry led the county-by-county ranking for September with 131 GWh. Cork followed with 102 GWh, then Offaly with 98 GWh, Mayo with 89 GWh and Galway with 88 GWh.
Cunniffe said communities across the country, Kerry among them, are making a large contribution to Irish energy security, and that wind brings investment and new opportunities to rural Ireland.
