Staying informed about electricity price fluctuations is crucial, as this energy source is essential for daily life. In recent years, power bills have surged dramatically, with historical highs exceeding €500 per MWh. These increases have made electricity costs one of the main financial burdens for Spanish households.
The wholesale market’s average price in 2025 stood at €14.87 per MWh, slightly above the 2024 average of €73 per MWh, reflecting a year of dynamic changes. The Iberian Energy Market Operator (OMIE) publishes the official data. For May 10, the average electricity price is expected to be €20.84 per MWh.
**When is electricity cheapest and most expensive?**
The most affordable time to use high-consumption appliances is from 15:00 to 17:00, when the price drops to -€0.82 per MWh. In contrast, the most expensive period is between 22:00 and 23:00, with rates reaching €90.99 per MWh.
**Hourly breakdown for May 10:**
– 00:00–01:00: €39.65/MWh
– 01:00–02:00: €33.76/MWh
– 02:00–03:00: €18.07/MWh
– 03:00–04:00: €14.47/MWh
– 04:00–05:00: €16.11/MWh
– 05:00–06:00: €16.34/MWh
– 06:00–07:00: €16.25/MWh
– 07:00–08:00: €17.61/MWh
– 08:00–09:00: €12.41/MWh
– 09:00–10:00: €7.73/MWh
– 10:00–11:00: €0.01/MWh
– 11:00–12:00: -€0.02/MWh
– 12:00–13:00: -€0.06/MWh
– 13:00–14:00: -€0.56/MWh
– 14:00–15:00: -€0.68/MWh
– 15:00–16:00: -€0.82/MWh
– 16:00–17:00: -€0.82/MWh
– 17:00–18:00: -€0.41/MWh
– 18:00–19:00: €0.21/MWh
– 19:00–20:00: €13.80/MWh
– 20:00–21:00: €52.02/MWh
– 21:00–22:00: €87.47/MWh
– 22:00–23:00: €90.99/MWh
– 23:00–00:00: €66.76/MWh
**Why does electricity price vary throughout the day?**
The main drivers behind these fluctuations include the cost of fossil fuels such as gas and oil, as well as periods of high demand — like morning and evening peak hours. During peak usage times, energy suppliers must purchase electricity on the market at higher prices, whereas during low-demand periods, they can rely on more efficient energy sources.
