So far: to 10 November, 452 of the month's 1,440 half hours. This page updates as the month goes on.
So far in November 2026 (to 10 November), Britain's electricity has averaged 208 gCO₂/kWh, in the moderate band (140–219 g). That is 81% dirtier than October 2026 (115 g), and 64% dirtier than November 2025 (127 g). Gas has made 47.7% of the electricity generated, wind 16.0%, nuclear 14.6% and biomass 9.2%; low-carbon sources together have made 44.0%. The cleanest half hour was 97 g at 03:00 on Monday 2 November, and the dirtiest 278 g at 22:30 on Sunday 8 November. Monday 2 November was both the cleanest day (147 g on average) and the windiest (30.5% wind).
Carbon intensity, day by day
Day by day, as a table
| Day | gCO₂/kWh | Low-carbon | Wind | Solar | Gas | Half hours |
|---|---|---|---|---|---|---|
| Sun 1 Nov | 171 | 50.1% | 16.6% | 3.0% | 36.4% | 48 |
| Mon 2 Nov | 147 | 59.4% | 30.5% | 3.0% | 32.3% | 48 |
| Tue 3 Nov | 166 | 54.5% | 26.9% | 2.7% | 37.4% | 48 |
| Wed 4 Nov | 169 | 54.4% | 28.1% | 2.0% | 38.3% | 48 |
| Thu 5 Nov | 179 | 52.5% | 26.9% | 1.7% | 40.8% | 48 |
| Fri 6 Nov | 238 | 36.1% | 8.9% | 1.8% | 55.3% | 48 |
| Sat 7 Nov | 256 | 31.8% | 3.5% | 2.4% | 60.5% | 48 |
| Sun 8 Nov | 260 | 30.5% | 2.2% | 2.6% | 61.4% | 48 |
| Mon 9 Nov | 261 | 30.7% | 3.5% | 2.6% | 60.6% | 48 |
| Tue 10 Nov | 259 | 33.0% | 8.4% | 0.7% | 61.6% | 20 |
What powered the grid
Each fuel's average share of the electricity generated in Great Britain in November 2026, with November 2025 beneath it for comparison. Imports count as one source, as NESO counts them.
Hours in each carbon band
- Low (70–139 g): 21 hours, 9%
- Moderate (140–219 g): 99 hours, 44%
- High (220–299 g): 107 hours, 47%
Records in November 2026
- Cleanest half hour
- 97 g 03:00 on Monday 2 November
- Dirtiest half hour
- 278 g 22:30 on Sunday 8 November
- Most wind
- 39.6% 04:00 on Monday 2 November
- Most solar
- 13.4% 12:00 on Sunday 1 November
- Most low-carbon
- 71.1% 04:00 on Monday 2 November
- Least gas
- 19.9% 03:00 on Monday 2 November
- Cleanest day
- 147 g Monday 2 November
- Dirtiest day
- 261 g Monday 9 November
- Windiest day
- 30.5% wind Monday 2 November
- Sunniest day
- 3.0% solar Sunday 1 November
About these figures
GridMonkey records NESO's carbon intensity and generation mix for Great Britain every half hour: the actual figure where NESO has published one, otherwise its forecast. They are added up by UK calendar day and month. Percentages are shares of the electricity generated, imports included, so the fuels add up to 100%. Low-carbon means wind, solar, nuclear, biomass and hydro. The carbon bands are GridMonkey's: very low under 70 g, low 70–139 g, moderate 140–219 g, high 220–299 g and very high 300 g or more, per kWh. Northern Ireland has its own grid and isn't included.
To see the grid now, open GridMonkey. For the wind farms that ran hardest this week, see the wind farm league table.
Download and cite
Each UK day of November 2026 so far, to 10 November: its average carbon intensity and the shares of low-carbon power, wind, solar and gas, as in the day-by-day table above. Every month since May 2018 and every day are on GridMonkey's data page, free to reuse under CC BY 4.0 with credit to GridMonkey.
Cite this page (Harvard)
Energycount (2026) UK Electricity in November 2026: Carbon and Mix. Available at: https://energycount.co.uk/tools/grid-mix/reports/2026-11/ (Accessed: [date]).
Data: NESO Carbon Intensity API (carbonintensity.org.uk), licensed under CC BY 4.0, recorded and summarised by GridMonkey. Figures as of 10 November 2026.