Swiss Energy Consumption Rises Slightly in 2025

Switzerland’s final energy consumption increased slightly in 2025, rising by 0.2 percent to a total of 777,870 terajoules (TJ), according to the Swiss Federal Office of Energy.

Authorities attributed the rise mainly to colder weather compared with the previous year and higher aviation fuel sales. The number of heating degree days increased by 5.6 percent, reflecting stronger demand for heating energy across the country.

The report also highlights broader structural factors contributing to long-term energy demand growth, including population increase, economic activity, vehicle ownership, and expanding housing stock.

Aviation fuel sales rose by 3.2 percent, approaching the peak levels recorded in 2018. In contrast, petrol and diesel consumption declined by around 1 percent overall.

Fossil fuels still account for approximately one third of Switzerland’s total final energy consumption. However, renewable energy sources continue to gain ground, with biofuel consumption increasing by 9.5 percent and surpassing 5 percent of total fuel sales for the first time.

Electricity consumption also saw a modest rise of 0.8 percent, reaching 58.0 terawatt-hours (TWh). At the same time, consumption of heating oil and natural gas declined by 4.3 percent and 1.1 percent respectively.

Renewable energy continues to expand across multiple sectors. The use of heat pumps increased by 8.4 percent, while the renewable share of district heating rose to 44.7 percent in 2025. However, solar thermal and wood energy usage recorded slight declines.

Biogas consumption also increased, with a 0.5 percent rise in direct use and a 12.9 percent increase when including biogas fed into the natural gas grid.

Overall, renewable energy sources accounted for 27.5 percent of total final energy consumption in 2025.

Domestic electricity production fell by 16.7 percent to 67.5 TWh. Hydropower remained the dominant source, contributing 55.5 percent of total generation, followed by nuclear energy at 27.2 percent, and thermal plus renewable sources at 17.3 percent. Solar power accounted for 11.8 percent of total electricity production.

The data reflects Switzerland’s ongoing energy transition, with gradual growth in renewables alongside stable overall consumption levels.