Olkiluoto produced 27.5 per cent of Finland’s electricity needs last year
According to the “Electricity Year 2025” summary published today by the Finnish Energy Industries production at Olkiluoto covered 27.5 per cent of Finland’s total electricity demand. In total, 85 TWh of electricity was consumed in Finland last year, representing a two TWh increase compared with the previous year.
Finland is very much a nuclear power country. Nuclear energy accounted for 37 per cent of the nation’s total consumption. The next largest source was wind power at 26.1 per cent, followed by hydropower at 14.5 per cent.
Olkiluoto’s significance is considerable. In total, 23.41 TWh of electricity was produced in the country during 2025, as we reported already in early January.
Alongside Eurajoki’s Olkiluoto, electricity is also generated by splitting uranium at Loviisa. Combined, these two nuclear power sites produced 31.31 TWh of electricity in 2025. This is slightly more than the previous year, when the figure was 31.16 TWh.
As can be deduced from the aforementioned modes of production, Finnish electricity generation is rather fossil-free. The share of clean electricity in Finland reached an impressive 96 percent last year.
Compared to the rest of Europe, Finland also enjoys affordable electricity. In Finland, wholesale electricity was the third cheapest in Europe, after Norway and Sweden.
Some of the growth in electricity consumption was covered by imports, which rose from just under four per cent in 2024 to nearly seven per cent. Last year, net electricity imports into Finland amounted to about 5.6 TWh. In the long term, however, this figure is relatively low. Between 2017 and 2019, Finland imported around 20 TWh of electricity annually.
Text: Ville Kulmala
Photo: Tapani Karjanlahti