Switzerland Nuclear Power: Generation, Share and Trend
Switzerland generated 19.4 TWh of electricity from nuclear in 2025, 29.9% of its total, according to Ember. That made it the 18th largest nuclear power producer in 2025 of the 32 countries with Ember data, comparing each country's latest year. Nuclear supplied 8.9% of the world's electricity in 2025. These are annual statistics for 2025, with monthly figures through May 2026; they are
compiled from national sources and are not real time.
Key Facts
Switzerland generated 19.4 TWh of electricity from nuclear in 2025.
Nuclear supplied 29.9% of Switzerland's electricity in 2025.
Switzerland was the 18th largest nuclear power producer in 2025 among the 32 countries with Ember data, comparing each country's latest year.
Switzerland's nuclear generation in 2025 was 19% lower than in 2020, when it was 24.0 TWh.
Switzerland's nuclear generation in 2025 was 16% lower than in 2015, when it was 23.1 TWh.
Switzerland's nuclear generation peaked at 27.9 TWh in 2007.
Switzerland's nuclear share in 2025 was above the world share of 8.9%.
Switzerland had 2.97 GW of nuclear generating capacity in 2025.
Key Figures, 2025
Measure
Value
As of / source
Nuclear generation
19.4 TWh
2025 · Ember
Share of Switzerland's electricity
29.9%
2025 · Ember
World share of nuclear
8.9%
2025 · Ember
Rank by nuclear generation (each country's latest year)
18 of 32
2025 · Ember
Nuclear capacity
2.97 GW
2025 · Ember
Nuclear Generation Year by Year
Ember annual statistics, 2000 to 2025
Nuclear
Switzerland's electricity generation from nuclear each year from 2000 to 2025, in TWh. It was 19.4 TWh in 2025.
Annual statistics through 2025, TWh
Switzerland nuclear electricity generation, 2000 to 2025
Year
Nuclear
2000
26.5 TWh
2001
26.8 TWh
2002
27.2 TWh
2003
27.5 TWh
2004
27.0 TWh
2005
23.3 TWh
2006
27.8 TWh
2007
27.9 TWh
2008
27.7 TWh
2009
27.7 TWh
2010
26.3 TWh
2011
26.7 TWh
2012
25.4 TWh
2013
26.0 TWh
2014
27.6 TWh
2015
23.1 TWh
2016
21.2 TWh
2017
20.4 TWh
2018
25.5 TWh
2019
26.4 TWh
2020
24.0 TWh
2021
19.4 TWh
2022
24.2 TWh
2023
24.4 TWh
2024
24.0 TWh
2025
19.4 TWh
SwitzerlandWorld
The share of Switzerland's electricity generated from nuclear, 2000 to 2025, compared with the world share. In 2025 it was 29.9%, against 8.9% worldwide.
Annual statistics through 2025, % of generation
Share of Switzerland's electricity from nuclear and the world share, 2000 to 2025
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of 2025. World shares are Ember's World totals; ranks compare each country's latest year, which can differ between countries.
Nuclear Generation Month by Month
Ember monthly statistics through May 2026
Nuclear
Switzerland generated 1.14 TWh of electricity from nuclear in May 2026, against 1.12 TWh in May 2025.
Monthly statistics through May 2026, TWh
Switzerland monthly nuclear electricity generation, June 2024 to May 2026
Month
Nuclear
2024-06
1.25 TWh
2024-07
2.14 TWh
2024-08
2.00 TWh
2024-09
2.07 TWh
2024-10
1.91 TWh
2024-11
2.12 TWh
2024-12
2.20 TWh
2025-01
2.20 TWh
2025-02
1.97 TWh
2025-03
2.18 TWh
2025-04
1.88 TWh
2025-05
1.12 TWh
2025-06
1.35 TWh
2025-07
1.14 TWh
2025-08
1.15 TWh
2025-09
1.12 TWh
2025-10
1.41 TWh
2025-11
1.40 TWh
2025-12
1.45 TWh
2026-01
1.45 TWh
2026-02
1.31 TWh
2026-03
1.47 TWh
2026-04
1.85 TWh
2026-05
1.14 TWh
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of May 2026. Monthly figures for Switzerland can differ slightly from the annual totals.