Monthly report · day-ahead marketElectricity prices in Great Britain, September 2025
In September 2025, electricity on the day-ahead market in Great Britain cost an average of 6.72p/kWh (£67.22/MWh).
That is 7% less than in August 2025 and 16% less than in September 2024.
The cheapest day was Monday, 15 September 2025, averaging 1.20p/kWh; the most expensive was Monday, 29 September 2025 at 9.36p/kWh.
The lowest price came on 7 September 2025 at 13:00 (-1.07p/kWh), the highest on 29 September 2025 at 18:00 (17.53p/kWh). In total, prices were below zero for 32 hours.
On an average day, the cheapest three hours were 12:00–15:00. Weekends were on average 15% cheaper than weekdays.
Compared with
- Previous month (August 2025)
- 7.21 ▼
- Same month last year
- 8.04 ▼
- Weekdays
- 7.01
- Weekends
- 5.93
Wholesale price · p/kWh
Price by day
Daily wholesale average; the line marks the monthly average.
p/kWh
The average day
Average wholesale price for each hour of the day this month.
p/kWh · 12:00–15:00
All days
| Day | Average | Lowest | Highest | Hours < 0 |
|---|---|---|---|---|
| 1 Sept Monday | 4.94 | 0.77 03:00 | 10.38 19:00 | – |
| 2 Sept Tuesday | 8.28 | 6.77 00:00 | 10.69 18:00 | – |
| 3 Sept Wednesday | 7.97 | 5.71 22:00 | 9.49 09:00 | – |
| 4 Sept Thursday | 7.77 | 4.72 01:00 | 12.10 19:00 | – |
| 5 Sept Friday | 8.38 | 6.64 03:00 | 12.34 19:00 | – |
| 6 Sept Saturday | 6.41 | 0.75 13:00 | 8.78 06:00 | – |
| 7 Sept Sunday | 1.77 | -1.07 13:00 | 9.14 18:00 | 15 |
| 8 Sept Monday | 8.77 | 6.24 23:00 | 14.04 18:00 | – |
| 9 Sept Tuesday | 8.57 | 7.05 14:00 | 11.39 07:00 | – |
| 10 Sept Wednesday | 7.59 | 3.82 22:00 | 10.80 07:00 | – |
| 11 Sept Thursday | 4.47 | 0.92 11:00 | 10.92 19:00 | – |
| 12 Sept Friday | 3.33 | -0.22 02:00 | 11.10 19:00 | 5 |
| 13 Sept Saturday | 4.49 | 0.48 13:00 | 10.79 19:00 | – |
| 14 Sept Sunday | 6.58 | 0.89 22:00 | 9.65 08:00 | – |
| 15 Sept Monday | 1.20 | -0.17 02:00 | 4.75 18:00 | 8 |
| 16 Sept Tuesday | 3.04 | -0.05 02:00 | 10.50 20:00 | 4 |
| 17 Sept Wednesday | 7.56 | 4.27 14:00 | 10.39 19:00 | – |
| 18 Sept Thursday | 4.83 | 0.89 14:00 | 10.36 19:00 | – |
| 19 Sept Friday | 7.66 | 4.67 02:00 | 12.23 19:00 | – |
| 20 Sept Saturday | 8.03 | 3.49 22:00 | 9.80 09:00 | – |
| 21 Sept Sunday | 3.35 | 0.01 04:00 | 10.52 19:00 | – |
| 22 Sept Monday | 8.15 | 5.20 03:00 | 12.67 18:00 | – |
| 23 Sept Tuesday | 9.12 | 6.82 11:00 | 14.34 18:00 | – |
| 24 Sept Wednesday | 8.54 | 7.00 13:00 | 11.58 07:00 | – |
| 25 Sept Thursday | 8.08 | 6.50 03:00 | 10.73 08:00 | – |
| 26 Sept Friday | 8.26 | 6.87 03:00 | 10.71 19:00 | – |
| 27 Sept Saturday | 8.12 | 6.82 03:00 | 10.66 18:00 | – |
| 28 Sept Sunday | 8.66 | 7.27 06:00 | 13.73 18:00 | – |
| 29 Sept Monday | 9.36 | 7.00 13:00 | 17.53 18:00 | – |
| 30 Sept Tuesday | 8.39 | 6.80 22:00 | 12.31 18:00 | – |
p/kWh · Today · Methodology