UK electricity in 2025
How Great Britain made its electricity in 2025, from 365 days of half-hourly data.
In 2025, wind made 30% of Britain's electricity, ahead of gas (27%). Renewables made 44% (up from 42% in 2024), and the average carbon intensity was 127 g/kWh.
Every day was coal-free.
Electricity generated each day in 2025
GWh a day
tap the chart for values
the numbers
- Nuclear
- Gas
- Hydro
- Imports
- Biomass
- Pumped storage
- Wind
- Solar
- Other
Share of electricity, by source
tap the chart for values
the numbers
Carbon intensity
g CO₂ per kWh, daily average
tap the chart for values
the numbers
2025 in total
| Source | Electricity | Share |
|---|---|---|
| Wind | 85.8 TWh | 29.7% |
| Gas | 77.3 TWh | 26.7% |
| Imports | 44.0 TWh | 15.2% |
| Nuclear | 34.2 TWh | 11.8% |
| Biomass | 19.9 TWh | 6.9% |
| Solar | 18.7 TWh | 6.5% |
| Other | 4,668 GWh | 1.6% |
| Hydro | 3,366 GWh | 1.2% |
| Pumped storage | 1,311 GWh | 0.5% |
| Renewable (wind, solar, hydro, biomass) | 44.2% | |
| Low carbon (renewable plus nuclear) | 56.0% |
Standout days
- Windiest day509.4 GWh of windWed, 10 December 2025
- Highest wind share63.9%Sat, 4 October 2025
- Sunniest day117.9 GWh of solarTue, 8 July 2025
- Cleanest day43 g/kWh averageThu, 29 May 2025
- Dirtiest day269 g/kWh averageWed, 22 January 2025
- Busiest day1040.5 GWh in totalWed, 26 November 2025
Month by month
| Month | Total | Wind | Gas | Nuclear | Solar | Carbon |
|---|---|---|---|---|---|---|
| January 2025 | 28.5 TWh | 27% | 38% | 11% | 2% | 168 g |
| February 2025 | 25.4 TWh | 31% | 32% | 12% | 3% | 148 g |
| March 2025 | 25.4 TWh | 26% | 31% | 11% | 7% | 142 g |
| April 2025 | 22.0 TWh | 22% | 26% | 13% | 11% | 128 g |
| May 2025 | 21.9 TWh | 26% | 20% | 15% | 12% | 101 g |
| June 2025 | 21.9 TWh | 31% | 18% | 15% | 12% | 92 g |
| July 2025 | 22.0 TWh | 19% | 25% | 15% | 11% | 123 g |
| August 2025 | 21.7 TWh | 26% | 23% | 11% | 10% | 117 g |
| September 2025 | 22.3 TWh | 35% | 22% | 10% | 8% | 108 g |
| October 2025 | 24.6 TWh | 34% | 29% | 10% | 3% | 141 g |
| November 2025 | 26.4 TWh | 37% | 27% | 10% | 2% | 133 g |
| December 2025 | 27.2 TWh | 38% | 25% | 10% | 2% | 122 g |