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Data as of 2026-09-20
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Built 2026-09-21 (21 September 2026)

Hungary Demand Forecast Accuracy: Error, Bias and Worst Miss, 23 August to 20 September 2026

The day-ahead demand forecast for Hungary was off by 3.9% on average (mean absolute percentage error) over 686 hours from 23 August to 20 September 2026, and 71% of hours landed within 5% of the reading. Its bias was -2.6%: it ran low on average, an under forecast. The largest miss was 533 MW (11.7%) too low at 29 Aug 2026, 13:00 CEST (UTC+02:00). Dates and times are local (Europe/Budapest).

Key Facts

  • The day-ahead demand forecast for Hungary was off by 3.9% on average (mean absolute percentage error) over 686 hours from 23 August to 20 September 2026, and 71% of hours landed within 5% of the reading. Its bias was -2.6%: it ran low on average, an under forecast. The largest miss was 533 MW (11.7%) too low at 29 Aug 2026, 13:00 CEST (UTC+02:00).
  • Across 47 European bidding zones ranked by average error over their own latest 30 day windows, Hungary came 25 (1 is the smallest error).
  • On average the forecast differed from reported demand by 176 MW, against average demand of 4,560 MW.
  • The forecast was above reported demand in 21% of compared hours.

Forecast Error at a Glance

686 hours from 23 August to 20 September 2026
Average error3.9%
Bias-2.6%
Hours within 5%71%
Worst miss533 MW

Average error is the mean absolute percentage gap between the forecast and reported demand. Bias is the signed mean (-127 MW per hour on average): the forecast ran low on average, an under forecast. The worst miss was 533 MW (11.7%) too low at 29 Aug 2026, 13:00 CEST (UTC+02:00): forecast 4,022 MW, reported 4,555 MW.

Source: ENTSO-E Transparency Platform (transparency.entsoe.eu), CC BY 4.0. Aggregated and converted by World Power Monitor; ENTSO-E does not endorse this site. (ENTSO-E Terms of Use plus CC BY 4.0 for listed data items) Data as of 2026-09-20. Accuracy is computed by World Power Monitor from the operator's hourly forecast and reported demand.

Forecast and Reported Demand, Last 7 Days

Local time, to 20 Sept 2026, 13:00 CEST (UTC+02:00)
Hungary day-ahead demand forecast and reported demand by hour Hourly reported demand and the day-ahead forecast for Hungary over the last 7 days of the window, to 20 Sept 2026, 13:00 CEST (UTC+02:00). Gaps are hours with a missing, zero or implausible report. 0 1,500 3,000 4,500 6,000 13 Sept, 14:0014 Sept, 14:0015 Sept, 14:0016 Sept, 14:0017 Sept, 14:0018 Sept, 14:0019 Sept, 14:00
Hourly reported demand and the day-ahead forecast for Hungary over the last 7 days of the window, to 20 Sept 2026, 13:00 CEST (UTC+02:00). Gaps are hours with a missing, zero or implausible report.
Data to 2026-09-20
Hungary day-ahead demand forecast and reported demand by hour
Local hourReported demandDay-ahead forecast
13 Sept, 14:003,720 MW3,590 MW
13 Sept, 15:003,843 MW3,759 MW
13 Sept, 16:004,014 MW4,000 MW
13 Sept, 17:004,370 MW4,306 MW
13 Sept, 18:004,699 MW4,584 MW
13 Sept, 19:004,952 MW5,055 MW
13 Sept, 20:004,879 MW4,938 MW
13 Sept, 21:004,573 MW4,648 MW
13 Sept, 22:004,417 MW4,379 MW
13 Sept, 23:004,241 MW4,109 MW
14 Sept, 00:003,925 MW3,815 MW
14 Sept, 01:003,733 MW3,618 MW
14 Sept, 02:003,712 MW3,542 MW
14 Sept, 03:003,754 MW3,576 MW
14 Sept, 04:003,914 MW3,757 MW
14 Sept, 05:004,241 MW4,136 MW
14 Sept, 06:004,742 MW4,769 MW
14 Sept, 07:005,050 MW5,062 MW
14 Sept, 08:005,153 MW5,017 MW
14 Sept, 09:005,120 MW4,994 MW
14 Sept, 10:005,153 MW4,992 MW
14 Sept, 11:005,129 MW5,027 MW
14 Sept, 12:005,124 MW4,973 MW
14 Sept, 13:004,962 MW4,812 MW
14 Sept, 14:004,769 MW4,765 MW
14 Sept, 15:004,832 MW4,856 MW
14 Sept, 16:005,016 MW4,954 MW
14 Sept, 17:005,159 MW5,109 MW
14 Sept, 18:005,369 MW5,321 MW
14 Sept, 19:005,590 MW5,645 MW
14 Sept, 20:005,462 MW5,445 MW
14 Sept, 21:005,105 MW5,084 MW
14 Sept, 22:004,938 MW4,797 MW
14 Sept, 23:004,788 MW4,590 MW
15 Sept, 00:004,485 MW4,304 MW
15 Sept, 01:004,219 MW4,038 MW
15 Sept, 02:004,115 MW3,940 MW
15 Sept, 03:004,167 MW3,951 MW
15 Sept, 04:004,210 MW4,093 MW
15 Sept, 05:004,453 MW4,426 MW
15 Sept, 06:004,936 MW4,946 MW
15 Sept, 07:004,938 MW5,050 MW
15 Sept, 08:004,599 MW4,860 MW
15 Sept, 09:004,219 MW4,605 MW
15 Sept, 10:003,898 MW4,344 MW
15 Sept, 11:003,907 MW4,277 MW
15 Sept, 12:004,056 MW4,273 MW
15 Sept, 13:004,115 MW4,299 MW
15 Sept, 14:004,283 MW4,391 MW
15 Sept, 15:004,451 MW4,549 MW
15 Sept, 16:004,738 MW4,772 MW
15 Sept, 17:005,158 MW5,049 MW
15 Sept, 18:005,471 MW5,304 MW
15 Sept, 19:005,673 MW5,671 MW
15 Sept, 20:005,535 MW5,504 MW
15 Sept, 21:005,145 MW5,142 MW
15 Sept, 22:004,955 MW4,870 MW
15 Sept, 23:004,821 MW4,687 MW
16 Sept, 00:004,545 MW4,262 MW
16 Sept, 01:004,234 MW3,991 MW
16 Sept, 02:004,120 MW3,854 MW
16 Sept, 03:004,119 MW3,867 MW
16 Sept, 04:004,236 MW4,003 MW
16 Sept, 05:004,463 MW4,330 MW
16 Sept, 06:004,930 MW4,847 MW
16 Sept, 07:004,906 MW4,930 MW
16 Sept, 08:004,525 MW4,634 MW
16 Sept, 09:004,209 MW4,300 MW
16 Sept, 10:004,097 MW4,146 MW
16 Sept, 11:003,897 MW3,994 MW
16 Sept, 12:003,845 MW3,977 MW
16 Sept, 13:003,924 MW3,925 MW
16 Sept, 14:004,081 MW4,026 MW
16 Sept, 15:004,283 MW4,273 MW
16 Sept, 16:004,685 MW4,603 MW
16 Sept, 17:005,195 MW4,969 MW
16 Sept, 18:005,521 MW5,281 MW
16 Sept, 19:005,732 MW5,547 MW
16 Sept, 20:005,581 MW5,381 MW
16 Sept, 21:005,205 MW5,042 MW
16 Sept, 22:005,016 MW4,771 MW
16 Sept, 23:004,839 MW4,590 MW
17 Sept, 00:004,547 MW4,287 MW
17 Sept, 01:004,327 MW4,016 MW
17 Sept, 02:004,120 MW3,891 MW
17 Sept, 03:004,148 MW3,907 MW
17 Sept, 04:004,171 MW4,038 MW
17 Sept, 05:004,435 MW4,365 MW
17 Sept, 06:004,941 MW4,892 MW
17 Sept, 07:005,004 MW4,973 MW
17 Sept, 08:004,786 MW4,842 MW
17 Sept, 09:004,539 MW4,705 MW
17 Sept, 10:004,530 MW4,648 MW
17 Sept, 11:004,496 MW4,609 MW
17 Sept, 12:004,349 MW4,642 MW
17 Sept, 13:004,454 MW4,666 MW
17 Sept, 14:004,682 MW4,745 MW
17 Sept, 15:004,930 MW4,921 MW
17 Sept, 16:005,332 MW5,026 MW
17 Sept, 17:005,486 MW5,121 MW
17 Sept, 18:005,589 MW5,304 MW
17 Sept, 19:005,708 MW5,553 MW
17 Sept, 20:005,493 MW5,363 MW
17 Sept, 21:005,143 MW5,008 MW
17 Sept, 22:004,972 MW4,739 MW
17 Sept, 23:004,823 MW4,550 MW
18 Sept, 00:004,507 MW4,294 MW
18 Sept, 01:004,229 MW4,024 MW
18 Sept, 02:004,098 MW3,891 MW
18 Sept, 03:004,130 MW3,908 MW
18 Sept, 04:004,179 MW4,023 MW
18 Sept, 05:004,446 MW4,325 MW
18 Sept, 06:004,970 MW4,854 MW
18 Sept, 07:005,138 MW4,966 MW
18 Sept, 08:004,816 MW4,794 MW
18 Sept, 09:004,478 MW4,524 MW
18 Sept, 10:004,143 MW4,357 MW
18 Sept, 11:003,890 MW4,268 MW
18 Sept, 12:003,948 MW4,237 MW
18 Sept, 13:003,786 MW4,184 MW
18 Sept, 14:003,953 MW4,232 MW
18 Sept, 15:004,225 MW4,414 MW
18 Sept, 16:004,578 MW4,720 MW
18 Sept, 17:005,092 MW4,971 MW
18 Sept, 18:005,396 MW5,210 MW
18 Sept, 19:005,536 MW5,450 MW
18 Sept, 20:005,381 MW5,285 MW
18 Sept, 21:005,030 MW4,951 MW
18 Sept, 22:004,886 MW4,716 MW
18 Sept, 23:004,753 MW4,521 MW
19 Sept, 00:004,435 MW4,197 MW
19 Sept, 01:004,181 MW3,916 MW
19 Sept, 02:003,990 MW3,772 MW
19 Sept, 03:003,956 MW3,750 MW
19 Sept, 04:003,987 MW3,790 MW
19 Sept, 05:004,029 MW3,913 MW
19 Sept, 06:004,150 MW4,031 MW
19 Sept, 07:004,215 MW4,110 MW
19 Sept, 08:004,111 MW4,049 MW
19 Sept, 09:003,922 MW3,959 MW
19 Sept, 10:003,712 MW3,901 MW
19 Sept, 11:003,588 MW3,759 MW
19 Sept, 12:003,578 MW3,634 MW
19 Sept, 13:003,446 MW3,509 MW
19 Sept, 14:003,473 MW3,542 MW
19 Sept, 15:003,614 MW3,758 MW
19 Sept, 16:004,010 MW4,073 MW
19 Sept, 17:004,507 MW4,392 MW
19 Sept, 18:004,833 MW4,649 MW
19 Sept, 19:005,020 MW4,921 MW
19 Sept, 20:004,878 MW4,775 MW
19 Sept, 21:004,590 MW4,480 MW
19 Sept, 22:004,448 MW4,262 MW
19 Sept, 23:004,241 MW4,068 MW
20 Sept, 00:003,981 MW3,766 MW
20 Sept, 01:003,728 MW3,546 MW
20 Sept, 02:003,625 MW3,467 MW
20 Sept, 03:003,606 MW3,454 MW
20 Sept, 04:003,604 MW3,501 MW
20 Sept, 05:003,659 MW3,564 MW
20 Sept, 06:003,747 MW3,645 MW
20 Sept, 07:003,721 MW3,681 MW
20 Sept, 08:003,606 MW3,613 MW
20 Sept, 09:003,485 MW3,630 MW
20 Sept, 10:003,408 MW3,590 MW
20 Sept, 11:003,393 MW3,522 MW
20 Sept, 12:003,376 MW3,461 MW
20 Sept, 13:003,280 MW3,407 MW

Assumptions

  • Only hours with both a forecast and a positive demand reading count (686 of 686 hours in the window). Missing and zero values, and readings under 30% or over 3 times the grid's own median for the window, are treated as reporting faults and left out.
  • Error is (forecast minus reported demand) divided by reported demand; average error uses absolute values so high and low misses do not cancel. Bias keeps the sign and does cancel.
  • Reported demand is preliminary and may be revised. A 30 day window is a short sample and one heat wave or holiday can move these figures.
  • European figures are for the ENTSO-E bidding zone named on this page. US and European grids are ranked separately.