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Irish wind farms set September record at 1,256 GWh, 37% of demand

Wind farms in Ireland generated a record 1,256 GWh in September 2026, supplying 37% of national electricity demand. Wholesale prices averaged nearly 84 euros per MWh less on the windiest days than on gas-reliant days.

By Greener Numbers Editorial Team · Published October 18, 2026 · Updated 10/18/2026

Irish wind farms generated a record 1,256 GWh of electricity in September 2026, supplying 37% of the country's electricity demand, Wind Energy Ireland data cited by reNEWS shows.

The output surpassed the previous September record of 1,128 GWh set in 2025, an 11% increase. Wind supplied more than a third of Ireland's electricity across the first nine months of 2026, and wind and solar together met over 42% of September demand.

The average wholesale electricity price rose to 182.13 euros per MWh during the month on steadily rising gas prices. On the windiest days the average fell to 142.78 euros per MWh, compared with 226.51 euros per MWh on days reliant on imported gas - a gap of almost 84 euros per MWh.

"Wholesale electricity prices were almost 84 euros lower on the days with the most wind energy compared with prices on the days when we had to rely on imported gas," said Wind Energy Ireland chief executive Noel Cunniffe.

County Kerry led county-level generation at 131 GWh, followed by Cork at 102 GWh, Offaly at 98 GWh, Mayo at 89 GWh and Galway at 88 GWh. Wind Energy Ireland says faster grid connections, planning decisions and battery storage would let the country capture more low-cost clean power.

The figures are monthly generation estimates from the industry's representative body; they describe Ireland's system only and say nothing about other markets.

Official source: renews.biz ↗