Monthly market report
Ireland (SEM) IE-SEM — October 2025
Day-ahead auction, 744 settlement periods, computed from the same data the API serves.
Average price
97.02 €/MWh
+2.48 vs previous month
Negative prices
26 hours
26 settlement periods below 0
Avg daily spread
132.2 €/MWh
the arbitrage opportunity, day by day
Volatility (σ)
60.44 €/MWh
Extremes
- Cheapest period
- -18.39 €/MWh Oct 4, 04:00 UTC
- Priciest period
- 323.29 €/MWh Oct 16, 06:00 UTC
Top spike days
- 2025-10-16max 323.29 €/MWh
- 2025-10-15max 297.5 €/MWh
- 2025-10-22max 265 €/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 IE-SEM
- → 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.