OpenWindCast

Austria · onshore wind

Austria day-ahead wind power forecast

Austria has around 4.1 GW of onshore wind across 1,447 turbines. Despite the country's reputation for mountains, very little of that capacity is alpine. OpenWindCast publishes an independent day-ahead forecast of Austrian wind output and scores it daily against APG's own forecast.

Record updated 22 Sept 2026 Scored against APG

Tomorrow · Wed 23 Sept, 11:00 Vienna

Wind power forecast for Wednesday 23 September 2026

621MW

15.0% of 4,140 MW installed

APG, same hour
502 MW
Metered
not yet
80% interval
446 to 756 MW

Most recent scored day, Tue 22 Sept

Metered 2,669 MW. OpenWindCast 2,650 MW, off by 0.5% of capacity; APG 2,440 MW, off by 5.5%. OpenWindCast closer

Scoreboard against APG

Live since 18 Jul 2026 · 67 scored days · 18 Jul to 22 Sept

53% lower error than APG's own day-ahead forecast

OpenWindCast

3.46%

of capacity

APG

7.30%

of capacity

Closer on

67%

of days

Error is the average miss at the 11:00 target, as a share of installed capacity (nMAE). Back-test before go-live, shown apart: 332 days, 21% lower error than APG. Only live days count above.

Forecast against the operator and the metered output

One point per day at 11:00, in MW. The shaded area is what the fleet actually produced; before the Live marker the forecast line is the back-test.

Accuracy by type of day

Live record, split by how windy the day turned out. Average error in % of capacity; further left is better.

OpenWindCast APG
0%2.5%5%7.5%10%12.5%Low-wind days (42 days)Moderate days (20 days)High-wind days (5 days)0%5%10%15%Low-windModerateHigh-wind
Type of dayDaysOpenWindCastAPGCloser on
Low-wind days below 15% of capacity422.86%5.87%62%
Moderate days 15% to 35% of capacity204.82%9.51%75%
High-wind days above 35% of capacity53.12%10.55%80%

The daily record

One row per day at 11:00, in MW. Misses are in % of capacity. Losing days stay in the record.

JSON
Day (11:00) OpenWindCast APG Metered Our miss APG miss Closer
Wed 23 Sept 621 502 not yet – – pending
Tue 22 Sept 2,650 2,440 2,669 0.5% 5.5% OpenWindCast
Mon 21 Sept 2,906 2,184 3,156 6.0% 23.5% OpenWindCast
Sun 20 Sept 173 143 84 2.1% 1.4% APG
Sat 19 Sept 39 132 9 0.7% 3.0% OpenWindCast
Fri 18 Sept 36 86 48 0.3% 0.9% OpenWindCast
Thu 17 Sept 494 1,340 488 0.1% 20.6% OpenWindCast
Wed 16 Sept 662 560 316 8.4% 5.9% APG
Tue 15 Sept 45 56 23 0.5% 0.8% OpenWindCast
Mon 14 Sept 741 1,663 322 10.1% 32.4% OpenWindCast
Sun 13 Sept 50 162 96 1.1% 1.6% OpenWindCast
Sat 12 Sept 110 762 126 0.4% 15.4% OpenWindCast
Fri 11 Sept 808 108 630 4.3% 12.6% OpenWindCast
Thu 10 Sept 575 1,257 988 10.0% 6.5% APG

APG's forecast is captured on the day it is published and held fixed. Operators refine their forecasts nearer to delivery, so a value published later may differ. The most recent day or two settle once measured generation is published.

Forecasting wind in Austria

Austria's onshore wind fleet stands almost entirely in the flat Pannonian east, across northern Burgenland, Lower Austria and Styria. The forecast covers Austrian onshore wind and is scored against the day-ahead forecast APG publishes through the ENTSO-E Transparency Platform.

The Austrian fleet is a lowland fleet. It sits almost entirely in Burgenland, Lower Austria and around the Vienna basin, the flat and open eastern part of the country that forms the western edge of the Pannonian plain. The Alps to the west shape and block the flow rather than hosting turbines. That makes Austria a small, geographically coherent fleet in comparatively simple terrain, but also one with little internal spread, so a single weather situation applies to essentially the whole zone at once.

The benchmark

The benchmark is APG's own day-ahead wind forecast for the Austrian bidding zone, published through the ENTSO-E Transparency Platform, captured on the day it appears and held fixed thereafter.

What is published for Austria

One value per day: onshore wind output at 11:00 local time tomorrow, as a load factor and in megawatts. Once APG's own forecast for that day is published it is captured and held fixed, and once the metered output is settled both forecasts are scored against it. Every day is added to the record above and nothing is removed or rewritten later. How this is measured.

Questions about wind in Austria

Is Austrian wind power in the Alps?

Very little of it. The great majority of Austria's 4.1 GW sits in Burgenland, Lower Austria and the Vienna basin, flat eastern lowland on the edge of the Pannonian plain rather than mountain terrain.

Does hydro affect the wind forecast?

No. Austria's large hydro fleet is a separate technology and is part of neither the forecast nor the benchmark.

Other bidding zones

Compare every operator: how accurate are European TSO wind power forecasts? · How the scoring works