Monthly market report
Great Britain GB — August 2026
Day-ahead auction, 1,488 settlement periods, computed from the same data the API serves.
Average price
129.88 €/MWh
+23.64 vs previous month
Negative prices
5 hours
10 settlement periods below 0
Avg daily spread
90.2 €/MWh
the arbitrage opportunity, day by day
Volatility (σ)
36.64 €/MWh
Extremes
- Cheapest period
- -7.2 €/MWh Aug 8, 12:30 UTC
- Priciest period
- 226.26 €/MWh Aug 12, 17:30 UTC
Top spike days
- 2026-08-12max 226.26 €/MWh
- 2026-08-13max 217.84 €/MWh
- 2026-08-27max 215.45 €/MWh
Work with this data
- → Full 15-minute history via API (2015 onwards)
- → Battery arbitrage backtest against this month's prices
- → Live forecast accuracy for GB
- → Embed the live price chart on your site — free
Data source: ENTSO-E Transparency Platform (transparency.entsoe.eu). Data source: SMARD.de, Bundesnetzagentur | CC BY 4.0. Derived statistics are Voltcast own-IP output.