New figures from EirGrid show that renewable sources provided 43 per cent of Ireland’s electricity in October, with wind energy accounting for the bulk of generation.

Windfarms supplied 36 per cent of total electricity demand, generating 1,073 gigawatt hours (GWh) over the month. This marked an increase from 920 GWh in September. Grid-scale solar contributed around 2 per cent.

Electricity demand for October stood at 2,969 GWh, slightly higher than the previous month. By comparison, metered data from October 2024 recorded demand at 2,877 GWh, with renewables supplying 41.5 per cent of electricity. Wind accounted for 35 per cent and solar for 1.1 per cent last year.

Gas-fired generation made up 39 per cent of electricity in October, while 16 per cent was imported via interconnection.

EirGrid has also published its Winter Outlook for 2025–2026, covering the period from 3 November to 5 April. The report forecasts adequate generation capacity and a reduced risk of system alerts over the coming months.

The analysis highlights the impact of weather on electricity use, noting that a one-degree drop in temperature typically leads to a 55 megawatt increase in peak demand.

Diarmaid Gillespie, Director of System Operations at EirGrid, said the rise in demand was expected as Ireland enters the colder season. “We recently released our Winter Outlook, which forecast that there will be adequate generation capacity and a reduced risk of system alerts in the coming months,” he said.