Monthly market report
Spain ES — December 2025
Day-ahead auction, 2,976 settlement periods, computed from the same data the API serves.
Average price
77.93 €/MWh
+19.22 vs previous month
Negative prices
0 hours
0 settlement periods below 0
Avg daily spread
65.69 €/MWh
the arbitrage opportunity, day by day
Volatility (σ)
27.87 €/MWh
Extremes
- Cheapest period
- 0.5 €/MWh Dec 7, 12:00 UTC
- Priciest period
- 165.5 €/MWh Dec 29, 20:00 UTC
Top spike days
- 2025-12-29max 165.5 €/MWh
- 2025-12-01max 159.68 €/MWh
- 2025-12-17max 152.58 €/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 ES
- → 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.