Net electricity generation in the OECD membership reached 883.8 TWh In October 2025, a 2.5% increase year on year. Of this total, 411.8 TWh (46.6%) was produced from fossil fuels, 329.8 TWh (37.3%) from renewable sources and 138.0 TWh (15.6%) from nuclear power.
Generation from fossil fuels increased by 3.1% year-on-year in October 2025. Natural gas accounted for 29.2% of total generation, coal for 15.5% and oil for 1.3%. Generation from natural gas increased by 2.1% y-o-y (5.2 TWh), and from coal increased by 4.5% y-o-y (6.0 TWh). The increase in gas fired generation was mainly in OECD Europe (21.4% y-o-y, 9.2 TWh), counter-balancing a fall in the OECD Americas (-1.1% y-o-y, -1.8 TWh) and in OECD Asia Oceania (-5.7% y-o-y, -2.1 TWh). Coal-fired generation grew in Asia Oceania (4.7% y-o-y, 2.0 TWh) and the Americas (13.5% y-o-y, 7.4 TWh) but dropped in Europe (-9.8% y-o-y, -3.4 TWh).
From renewable sources generation increased by 4.7% y-on-y (+14.8 TWh) in October 2025. This trend was mainly driven by OECD Americas (6.6% y-o-y, 8.9 TWh), followed by Europe (2.3% y-o-y, 3.4 TWh) and Asia Oceania (7.1% y-o-y, 2.5 TWh). The output from solar generation continues to increase in the OECD (+18.2% y-o-y, +12.3 TWh). Wind generation increased y-o-y (10.1% y-o-y, 10.3 TWh) while hydro declined (-7.9% y-o-y, -9.2 TWh).
Nuclear power generation declined by 4.1% y-o-y (-5.9 TWh) in October. The 13% (3.0 TWh) decrease in OECD Asia Oceania was led by a drop in nuclear power generation in Korea (-19.5% y-o-y, -3.2 TWh). Nuclear power also fell in Europe (-4.3% y-o-y, -2.3 TWh) and in the Americas (-0.8% y-o-y, -0.5 TWh).
Notably, electricity generation from oil significantly increased, by 32.9% y-o-y in Spain, but at the same time generation from coal fell sharply (-93.2% y-o-y). Looking at the shares for generation from all combustible fuels, the figures imply that oil has replaced coal in Spain, while natural gas still is the main primary energy source among fossil fuels. In Spain in October last year, generation from combustible fuels represented 34.3% of total electricity generation.
