Overall gas demand in August was 9% higher than the same month last year, despite it being the fourth warmest August on record, the latest figures from Gas Networks Ireland show.
Gas Networks Ireland said the increase in demand for gas was partly driven by increased use in electricity generation, as coal-powered generation was phased out over the past 12 months.
Today's report shows that monthly gas demand fell by 9% compared to July, as warmer conditions reduced heating needs and stronger wind generation lessened the need for gas in power generation at times.
It also revealed that gas generated 45% of the country's electricity in August, down from 36% in August 2024. Gas Networks Ireland noted that at times, the contribution from gas peaked at 90% and never fell below 13%.
Wind supplied 27% of electricity, down from 35% the same time last year. While wind generation peaked at 75%, it dropped to less than 1% during periods of calm weather. Meanwhile solar power contributed 5% of electricity in August, slightly down from 6% in July.
Gas Networks Ireland said the use of coal also influenced the year-on-year comparison.
Coal still generated 3% of electricity last year - peaking at 10% - but by August of this year, coal had fully exited Ireland's energy mix, following the closure of Moneypoint’s coal-fired operations on Co Clare in June.
Without coal in the mix, gas is playing a greater role in ensuring security of supply, it noted.
Gas Networks Ireland's Director of Strategy and Regulation Edwina Nyhan said that August’s gas demand report again highlights the vital role gas plays in balancing Ireland's energy system.
"While warmer weather reduced overall gas demand and renewables played a significant role, gas ensured a secure and reliable supply when wind output fell away. As Ireland transitions its energy mix, gas continues to provide the flexibility needed to support renewable growth and maintain security of supply," she added.
