Slovenia Hydro Power: Generation, Share and Trend
Slovenia generated 4.08 TWh of electricity from hydro in 2025, 27.5% of its total, according to Ember. That made it the 72nd largest hydro power producer in 2025 of the 153 countries with Ember data, comparing each country's latest year. Hydro supplied 14.0% of the world's electricity in 2025. These are annual statistics for 2025, with monthly figures through August 2026; they are compiled from national sources and are not real time.
Key Facts
- Slovenia generated 4.08 TWh of electricity from hydro in 2025.
- Hydro supplied 27.5% of Slovenia's electricity in 2025.
- Slovenia was the 72nd largest hydro power producer in 2025 among the 153 countries with Ember data, comparing each country's latest year.
- Slovenia's hydro generation in 2025 was 17% lower than in 2020, when it was 4.93 TWh.
- Slovenia's hydro generation in 2025 was 7% higher than in 2015, when it was 3.81 TWh.
- Slovenia's hydro generation peaked at 6.09 TWh in 2014.
- Slovenia's hydro share in 2025 was above the world share of 14.0%.
- Slovenia had 1.14 GW of hydro generating capacity in 2025.
Key Figures, 2025
| Measure | Value | As of / source |
|---|---|---|
| Hydro generation | 4.08 TWh | 2025 · Ember |
| Share of Slovenia's electricity | 27.5% | 2025 · Ember |
| World share of hydro | 14.0% | 2025 · Ember |
| Rank by hydro generation (each country's latest year) | 72 of 153 | 2025 · Ember |
| Hydro capacity | 1.14 GW | 2025 · Ember |
Hydro Generation Year by Year
Ember annual statistics, 1990 to 2025Annual statistics through 2025, GWh
| Year | Hydro |
|---|---|
| 1990 | 2.95 TWh |
| 1991 | 3.61 TWh |
| 1992 | 3.42 TWh |
| 1993 | 3.04 TWh |
| 1994 | 3.40 TWh |
| 1995 | 3.25 TWh |
| 1996 | 3.67 TWh |
| 1997 | 3.09 TWh |
| 1998 | 3.45 TWh |
| 1999 | 3.74 TWh |
| 2000 | 3.83 TWh |
| 2001 | 3.80 TWh |
| 2002 | 3.31 TWh |
| 2003 | 2.96 TWh |
| 2004 | 4.09 TWh |
| 2005 | 3.46 TWh |
| 2006 | 3.59 TWh |
| 2007 | 3.27 TWh |
| 2008 | 4.02 TWh |
| 2009 | 4.71 TWh |
| 2010 | 4.52 TWh |
| 2011 | 3.56 TWh |
| 2012 | 3.90 TWh |
| 2013 | 4.63 TWh |
| 2014 | 6.09 TWh |
| 2015 | 3.81 TWh |
| 2016 | 4.50 TWh |
| 2017 | 3.87 TWh |
| 2018 | 4.70 TWh |
| 2019 | 4.48 TWh |
| 2020 | 4.93 TWh |
| 2021 | 4.71 TWh |
| 2022 | 3.15 TWh |
| 2023 | 5.02 TWh |
| 2024 | 5.34 TWh |
| 2025 | 4.08 TWh |
Annual statistics through 2025, % of generation
| Year | Slovenia | World |
|---|---|---|
| 1990 | 23.7% | n/a |
| 1991 | 28.3% | n/a |
| 1992 | 27.7% | n/a |
| 1993 | 25.4% | n/a |
| 1994 | 26.4% | n/a |
| 1995 | 25.2% | n/a |
| 1996 | 28.1% | n/a |
| 1997 | 23.4% | n/a |
| 1998 | 25.2% | n/a |
| 1999 | 28.2% | n/a |
| 2000 | 28.1% | 17.2% |
| 2001 | 26.2% | 16.5% |
| 2002 | 22.7% | 16.3% |
| 2003 | 21.4% | 15.7% |
| 2004 | 26.8% | 16.1% |
| 2005 | 22.9% | 16.1% |
| 2006 | 23.8% | 16.0% |
| 2007 | 21.7% | 15.5% |
| 2008 | 24.5% | 16.1% |
| 2009 | 28.7% | 16.3% |
| 2010 | 27.8% | 16.1% |
| 2011 | 22.4% | 15.9% |
| 2012 | 25.1% | 16.3% |
| 2013 | 29.3% | 16.4% |
| 2014 | 35.5% | 16.3% |
| 2015 | 25.7% | 16.2% |
| 2016 | 27.7% | 16.3% |
| 2017 | 24.1% | 16.0% |
| 2018 | 29.2% | 15.8% |
| 2019 | 28.2% | 15.8% |
| 2020 | 29.2% | 16.3% |
| 2021 | 30.2% | 15.2% |
| 2022 | 23.6% | 15.0% |
| 2023 | 32.3% | 14.3% |
| 2024 | 32.0% | 14.4% |
| 2025 | 27.5% | 14.0% |
| Year | Generation | Share | World share | Capacity |
|---|---|---|---|---|
| 2025 | 4.08 TWh | 27.5% | 14.0% | 1.14 GW |
| 2024 | 5.34 TWh | 32.0% | 14.4% | 1.17 GW |
| 2023 | 5.02 TWh | 32.3% | 14.3% | 1.17 GW |
| 2022 | 3.15 TWh | 23.6% | 15.0% | 1.17 GW |
| 2021 | 4.71 TWh | 30.2% | 15.2% | 1.17 GW |
| 2020 | 4.93 TWh | 29.2% | 16.3% | 1.17 GW |
| 2019 | 4.48 TWh | 28.2% | 15.8% | 1.17 GW |
| 2018 | 4.70 TWh | 29.2% | 15.8% | 1.16 GW |
| 2017 | 3.87 TWh | 24.1% | 16.0% | 1.17 GW |
| 2016 | 4.50 TWh | 27.7% | 16.3% | 1.11 GW |
Full year by year history for Slovenia
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.
Hydro Generation Month by Month
Ember monthly statistics through August 2026Monthly statistics through August 2026, TWh
| Month | Hydro |
|---|---|
| 2024-09 | 420 GWh |
| 2024-10 | 600 GWh |
| 2024-11 | 310 GWh |
| 2024-12 | 240 GWh |
| 2025-01 | 320 GWh |
| 2025-02 | 240 GWh |
| 2025-03 | 390 GWh |
| 2025-04 | 390 GWh |
| 2025-05 | 460 GWh |
| 2025-06 | 330 GWh |
| 2025-07 | 300 GWh |
| 2025-08 | 240 GWh |
| 2025-09 | 300 GWh |
| 2025-10 | 280 GWh |
| 2025-11 | 360 GWh |
| 2025-12 | 230 GWh |
| 2026-01 | 210 GWh |
| 2026-02 | 290 GWh |
| 2026-03 | 220 GWh |
| 2026-04 | 180 GWh |
| 2026-05 | 280 GWh |
| 2026-06 | 330 GWh |
| 2026-07 | 180 GWh |
| 2026-08 | 170 GWh |
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of August 2026. Monthly figures for Slovenia can differ slightly from the annual totals.