Monthly market report
Portugal PT — May 2026
Day-ahead auction, 2,976 settlement periods, computed from the same data the API serves.
Average price
54.05 €/MWh
+11.36 vs previous month
Negative prices
65.3 hours
261 settlement periods below 0
Avg daily spread
123.58 €/MWh
the arbitrage opportunity, day by day
Volatility (σ)
47.75 €/MWh
Extremes
- Cheapest period
- -2.1 €/MWh May 1, 14:00 UTC
- Priciest period
- 210 €/MWh May 11, 19:30 UTC
Top spike days
- 2026-05-11max 210 €/MWh
- 2026-05-28max 172.5 €/MWh
- 2026-05-26max 167.2 €/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 PT
- → 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.