When is electricity cheapest in Finland? Weekly patterns explained
The standard answer is "at night" — and it's wrong about half the time. Wind power has turned windy weekend afternoons into Finland's cheapest electricity hours, not the small hours of a weekday. Here's Q1 2025 data, timing tables, and what a washer, tumble dryer, and dishwasher can actually save you.
When is electricity cheapest in Finland? The question seems simple, but the answer has shifted considerably in recent years. 2025 was a record year for wind: Finland's total wind capacity reached 9,433 megawatts and wind covered almost 28 percent of the country's electricity consumption, according to Finnish Wind Power Association statistics. That changes the logic of cheap hours completely.
The old rule — "run appliances at night" — was built for an industrial-consumption world where nights were quiet and therefore cheap. That logic still holds on weekday nights. But on a windy Saturday, the situation flips: wind turbines run at full output precisely when industry and offices are idle. The result is that Saturday and Sunday afternoons between 10:00 and 16:00 can be cheaper than weekday nights between 02:00 and 06:00.
Why wind changes everything
Spot prices follow supply and demand. When the wind blows hard, turbines can't be switched off — they produce electricity on supply terms. On 18 March 2025, Finnish wind generation hit an instantaneous peak of 7,296 MW, confirmed in Fingrid's Q1 2025 management review. When supply surges faster than demand can follow, prices fall. At the extreme, they go negative.
Finland produces little solar power in winter, but that changes from spring onwards. In February and March, wind dominates. From June, solar adds another daytime supply spike. Motiva's demand-flexibility guide recommends shifting consumption precisely into these oversupply moments — which can't be locked into a calendar, because they depend on the wind forecast.
What Q1 2025 data shows
January–March 2025 was an affordable period for spot customers. The January 2025 average price was 6.63 c/kWh, February 5.93 c/kWh, March 5.96 c/kWh (VAT 25.5% included), per Sähkövertaaja.fi monthly price data. Finland's full-year 2025 average was 5.08 c/kWh — placing it as Europe's third-cheapest country, behind only Sweden and Norway, according to Yle's report.
The table below summarises Q1 2025 price ranges by time of day and day of week. The figures are based on Nord Pool FI area hourly averages for January–March 2025 and are indicative — your own next-day prices are always published the previous afternoon at around 14:00 on Nord Pool or via the Fingrid Hourly Price app.
| Time window | Typical price (c/kWh, excl. VAT) | Note |
|---|---|---|
| Weekdays 07:00–09:00 | 8–14 | Morning peak — commuting + industry starts |
| Weekdays 17:00–20:00 | 7–13 | Evening peak — households + EV chargers |
| Weekdays 02:00–06:00 | 3–7 | Typically the cheapest weekday window |
| Weekend 10:00–16:00 (windy) | 1–5 | Often cheapest hours of the whole week — wind driven |
| Weekend 10:00–16:00 (calm, cold) | 6–12 | Weekends aren't automatically cheap — the forecast decides |
| Weekdays 10:00–15:00 (windy) | 2–6 | Surprisingly cheap during wind peaks |
The thing nobody tells you
Almost every article on saving electricity says to run the washing machine at night. That advice is half-right. Weekday nights between 02:00 and 06:00 are genuinely cheap — true. But a windy Saturday afternoon between 11:00 and 15:00 is often cheaper than any weekday night. During Q1 2025, several Saturdays saw prices between 0 and 2 c/kWh from midmorning into the afternoon, driven by wind. The same weekends at night: 4–6 c/kWh.
That's the part nobody tells you. Night is cheap when you measure by the daily cycle alone. Wind power doesn't follow a clock — it follows the weather.
"Prices all over the place... I'm wondering why industry has such a small effect on electricity consumption...???"
Suomi24 user, electricity section (thread: "Consumption the same at night and during the day")
The question hits the mark. Industry's effect is real but varies by sector. More importantly, wind's share has grown large enough to outweigh the consumption cycle on many hours.
A question from Finnish forums: when should I start the washing machine?
"Night-time electricity guidance kicks in around 22:00. Spot prices are usually cheapest only from 03:00."
Suomi24 user, thread on spot electricity scheduling delays
This is a practical problem many people run into. Setting the washing machine to start at 22:00 rarely catches the cheapest window — the cheapest quarter-hours typically begin around 02:00–03:00. A lot depends on the next day's wind forecast. If Saturday is showing 10–15 m/s winds, schedule the washing machine for Saturday around 11:00–13:00, not Friday night.
Practical tip: check tomorrow's prices in the afternoon between 14:00–15:00. Fingrid's Hourly Price app shows the next day's 15-minute prices as soon as Nord Pool publishes them.
Seasonal variation: winter, spring, summer
The cheapest hours don't stay fixed across the year. Here's a summary of seasonal patterns.
| Season | Cheapest window | Price drivers |
|---|---|---|
| Winter (Dec–Feb) | Weekday nights 02:00–06:00, windy weekend afternoons | Cold snaps, OL3 maintenance, Sweden connection issues |
| Spring (Mar–May) | Windy weekend 10:00–16:00 | Hydro balances but doesn't always cover peaks |
| Summer (Jun–Aug) | Sunny weekend 11:00–15:00 | Nuclear maintenance outages; August often expensive |
| Autumn (Sep–Nov) | Windy Friday–Saturday | Industry restarts, demand rises |
August 2025 was exceptionally expensive: Yle reported the tax-exclusive monthly average rising to 6.9 c/kWh, when the Loviisa 2 maintenance outage, weak winds, and Swedish interconnection problems all coincided. A useful reminder that the cheap-hours logic holds in general, but individual weeks can diverge sharply.
Worked example: washer, tumble dryer, and dishwasher daily
Take a three-appliance household running the washing machine, tumble dryer, and dishwasher once each per day. Here's the annual difference between two timing strategies: "always at night" (weekday 03:00) versus "optimised" (windy weekend at noon plus weekday 03:00 the rest of the time).
| Appliance | Consumption/cycle | Cycles/year | Total kWh/year |
|---|---|---|---|
| Washing machine | 1.0 kWh | 365 | 365 kWh |
| Tumble dryer | 2.5 kWh | 200 | 500 kWh |
| Dishwasher | 1.2 kWh | 365 | 438 kWh |
| Total | 1,303 kWh/year |
Scenario A — "always at night" (weekday 03:00, average price 4.5 c/kWh):
1,303 kWh × 4.5 c = €58.60/year (excl. VAT, energy charge only)
Scenario B — optimised (roughly 20% of cycles on a windy weekend at noon, avg 2.0 c/kWh; remainder at weekday 03:00, avg 4.5 c):
260 kWh × 2.0 c + 1,043 kWh × 4.5 c = €5.20 + €46.94 = €52.10/year
The difference is €6.50/year from a timing change alone. That sounds modest — but it takes no more effort than night-scheduling, just a different time. Add an EV charger, hot water tank, or underfloor heating to the same calculation and the saving runs to €30–80 per year.
Motiva's demand-control examples page covers practical hardware setups that make automatic scheduling possible without checking prices every morning.
My take: forget the clock, follow the wind forecast
I'd recommend changing the question. Rather than asking "what time?", ask "when does it blow?" In practice, that means:
- Every afternoon at 14:00–15:00: open tomorrow's prices in the Fingrid Hourly Price app or at nordpool.cc.
- If tomorrow's Saturday or Sunday shows prices below 3 c/kWh during the day, shift your heaviest loads there.
- On weekdays, 02:00–06:00 remains a safe default — it beats weekday mornings and evenings almost every time.
- Avoid 07:00–09:00 and 17:00–20:00 on weekdays. These are statistically the most expensive windows.
On a fixed-price contract, timing makes no difference — the bill is the same regardless of when you run appliances. This advice applies only to spot electricity customers.
Energiavirasto reports that by the end of 2025, 34 percent of Finnish households had a spot electricity contract. According to Energiavirasto's analysis, almost every other household's electricity bill is already linked to consumption timing in some way. Knowing when electricity is cheapest is a practical question for a growing share of Finns.
Sources
- Finnish Wind Power Association: Wind Power Statistics 2025 — capacity 9,433 MW, 28% share (Tier A)
- Fingrid: Q1 2025 Management Review — peak output 7,296 MW in March (Tier A)
- Motiva: Electricity demand flexibility — shifting to low-price periods (Tier A)
- Motiva: Demand-control solution examples (Tier A)
- Energiavirasto: Consumption timing affects almost every other household — 34% on spot contracts (Tier A)
- Sähkövertaaja.fi: Monthly spot averages Q1 2025 — Jan 6.63, Feb 5.93, Mar 5.96 c/kWh (Tier B)
- Yle: Finland had Europe's third-cheapest electricity in 2025 — annual average 5.1 c/kWh (Tier B)
- Fingrid: Hourly Price app — 15-minute spot prices for next day (Tier A)
- Nord Pool CC: Real-time FI area 15-minute spot prices (Tier A)
- Vaasan Sähkö: Spot price variation — sauna example €0.50–€5.00 (Tier B)