New Zealand Hydro Power: Generation, Share and Trend
New Zealand generated 23.8 TWh of electricity from hydro in 2025, 54.8% of its total, according to Ember. That made it the 29th 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 July 2026; they are
compiled from national sources and are not real time.
Key Facts
New Zealand generated 23.8 TWh of electricity from hydro in 2025.
Hydro supplied 54.8% of New Zealand's electricity in 2025.
New Zealand was the 29th largest hydro power producer in 2025 among the 153 countries with Ember data, comparing each country's latest year.
New Zealand's hydro generation in 2025 was 1% lower than in 2020, when it was 24.0 TWh.
New Zealand's hydro generation in 2025 was 2% lower than in 2015, when it was 24.3 TWh.
New Zealand's hydro generation peaked at 27.0 TWh in 2004.
New Zealand's hydro share in 2025 was above the world share of 14.0%.
New Zealand had 5.50 GW of hydro generating capacity in 2025.
Key Figures, 2025
Measure
Value
As of / source
Hydro generation
23.8 TWh
2025 · Ember
Share of New Zealand's electricity
54.8%
2025 · Ember
World share of hydro
14.0%
2025 · Ember
Rank by hydro generation (each country's latest year)
29 of 153
2025 · Ember
Hydro capacity
5.50 GW
2025 · Ember
Hydro Generation Year by Year
Ember annual statistics, 2000 to 2025
Hydro
New Zealand's electricity generation from hydro each year from 2000 to 2025, in TWh. It was 23.8 TWh in 2025.
Annual statistics through 2025, TWh
New Zealand hydro electricity generation, 2000 to 2025
Year
Hydro
2000
24.2 TWh
2001
21.5 TWh
2002
24.6 TWh
2003
23.4 TWh
2004
27.0 TWh
2005
23.1 TWh
2006
23.3 TWh
2007
23.4 TWh
2008
22.1 TWh
2009
24.0 TWh
2010
24.5 TWh
2011
24.9 TWh
2012
22.7 TWh
2013
22.8 TWh
2014
24.1 TWh
2015
24.3 TWh
2016
25.7 TWh
2017
24.9 TWh
2018
26.0 TWh
2019
25.3 TWh
2020
24.0 TWh
2021
24.0 TWh
2022
25.9 TWh
2023
26.2 TWh
2024
23.5 TWh
2025
23.8 TWh
New ZealandWorld
The share of New Zealand's electricity generated from hydro, 2000 to 2025, compared with the world share. In 2025 it was 54.8%, against 14.0% worldwide.
Annual statistics through 2025, % of generation
Share of New Zealand's electricity from hydro 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.
Hydro Generation Month by Month
Ember monthly statistics through July 2026
Hydro
New Zealand generated 2.48 TWh of electricity from hydro in July 2026, against 2.40 TWh in July 2025.
Monthly statistics through July 2026, TWh
New Zealand monthly hydro electricity generation, August 2024 to July 2026
Month
Hydro
2024-08
1.65 TWh
2024-09
1.82 TWh
2024-10
1.99 TWh
2024-11
2.07 TWh
2024-12
2.00 TWh
2025-01
1.82 TWh
2025-02
1.51 TWh
2025-03
1.43 TWh
2025-04
1.50 TWh
2025-05
1.75 TWh
2025-06
1.98 TWh
2025-07
2.40 TWh
2025-08
2.26 TWh
2025-09
1.91 TWh
2025-10
2.13 TWh
2025-11
2.29 TWh
2025-12
2.07 TWh
2026-01
1.91 TWh
2026-02
1.75 TWh
2026-03
1.97 TWh
2026-04
1.78 TWh
2026-05
2.10 TWh
2026-06
2.11 TWh
2026-07
2.48 TWh
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of July 2026. Monthly figures for New Zealand can differ slightly from the annual totals.