Natural gas accounted for 39% of Ireland’s electricity generation in the first half of 2025, compared to 33% which came from wind generation. Gas’s contribution to power generation peaked at 90% and never dropped below 11%.
Gas Networks Ireland data shows overall gas demand in the first half of 2025 was broadly in line with the second half of 2024.
June
In June, total gas demand decreased by 9% compared to May and by 7% compared to June 2024. Gas supplied 36% of electricity in June, down from 40% in May and 42% in June 2024. Wind generation accounted for 30% in June, up from 22% in May.
Between 9–14 June, gas supplied 42% of electricity and wind supplied 23%. On 29–30 June, gas accounted for 58% of electricity, with a minimum of 31% during those two days.
Sectors
Sectoral gas demand in June declined year-on-year in residential (-21%), leisure/sports (-17%), and retail (-14%) sectors. Compressed natural gas (CNG) demand increased by 26% year-on-year.
Commenting, Gas Networks Ireland’s Director of Strategy and Regulation Edwina Nyhan, said “While overall gas demand typically dips over the summer months, it remains central to the resilience of Ireland’s energy system”.
“June’s data again illustrates how gas consistently supports electricity generation during periods of low wind, helping to keep the system secure and balanced” she said.
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