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Built 2026-10-28 (28 October 2026)

Romania Demand Forecast Accuracy: Error, Bias and Worst Miss, 30 September to 28 October 2026

The day-ahead demand forecast for Romania was off by 2.3% on average (mean absolute percentage error) over 681 hours from 30 September to 28 October 2026, and 89% of hours landed within 5% of the reading. Its bias was +0.3%: it ran close to balanced on average. The largest miss was 688 MW (10.3%) too low at 26 Oct 2026, 14:00 EET (UTC+02:00). Dates and times are local (Europe/Bucharest).

Key Facts

  • The day-ahead demand forecast for Romania was off by 2.3% on average (mean absolute percentage error) over 681 hours from 30 September to 28 October 2026, and 89% of hours landed within 5% of the reading. Its bias was +0.3%: it ran close to balanced on average. The largest miss was 688 MW (10.3%) too low at 26 Oct 2026, 14:00 EET (UTC+02:00).
  • Across 47 European bidding zones ranked by average error over their own latest 30 day windows, Romania came 12 (1 is the smallest error).
  • On average the forecast differed from reported demand by 127 MW, against average demand of 5,648 MW.
  • The forecast was above reported demand in 54% of compared hours.

Forecast Error at a Glance

681 hours from 30 September to 28 October 2026
Average error2.3%
Bias+0.3%
Hours within 5%89%
Worst miss688 MW

Average error is the mean absolute percentage gap between the forecast and reported demand. Bias is the signed mean (+11 MW per hour on average): the forecast ran close to balanced on average. The worst miss was 688 MW (10.3%) too low at 26 Oct 2026, 14:00 EET (UTC+02:00): forecast 6,010 MW, reported 6,698 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 2026-10-28. 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 28 Oct 2026, 14:00 EET (UTC+02:00)
Romania day-ahead demand forecast and reported demand by hour Hourly reported demand and the day-ahead forecast for Romania over the last 7 days of the window, to 28 Oct 2026, 14:00 EET (UTC+02:00). Gaps are hours with a missing, zero or implausible report. 0 2,000 4,000 6,000 8,000 21 Oct, 16:0022 Oct, 16:0023 Oct, 16:0024 Oct, 16:0025 Oct, 15:0026 Oct, 15:0027 Oct, 15:00
Hourly reported demand and the day-ahead forecast for Romania over the last 7 days of the window, to 28 Oct 2026, 14:00 EET (UTC+02:00). Gaps are hours with a missing, zero or implausible report.
Data to 2026-10-28
Show the data table (168 rows)
Local hourReported demandDay-ahead forecast
21 Oct, 16:005,549 MW5,683 MW
21 Oct, 17:006,265 MW6,325 MW
21 Oct, 18:006,854 MW6,950 MW
21 Oct, 19:007,222 MW7,330 MW
21 Oct, 20:007,101 MW7,250 MW
21 Oct, 21:006,714 MW6,830 MW
21 Oct, 22:006,202 MW6,255 MW
21 Oct, 23:005,657 MW5,798 MW
22 Oct, 00:005,305 MW5,400 MW
22 Oct, 01:005,137 MW5,220 MW
22 Oct, 02:005,061 MW5,170 MW
22 Oct, 03:005,272 MW5,155 MW
22 Oct, 04:005,378 MW5,200 MW
22 Oct, 05:005,437 MW5,350 MW
22 Oct, 06:005,811 MW5,903 MW
22 Oct, 07:006,559 MW6,650 MW
22 Oct, 08:007,040 MW7,038 MW
22 Oct, 09:007,201 MW7,100 MW
22 Oct, 10:007,163 MW6,960 MW
22 Oct, 11:007,155 MW6,703 MW
22 Oct, 12:007,115 MW6,503 MW
22 Oct, 13:007,102 MW6,450 MW
22 Oct, 14:006,645 MW6,433 MW
22 Oct, 15:006,497 MW6,400 MW
22 Oct, 16:006,742 MW6,435 MW
22 Oct, 17:006,801 MW6,673 MW
22 Oct, 18:007,165 MW7,023 MW
22 Oct, 19:007,427 MW7,303 MW
22 Oct, 20:007,285 MW7,230 MW
22 Oct, 21:006,906 MW6,848 MW
22 Oct, 22:006,290 MW6,253 MW
22 Oct, 23:005,819 MW5,823 MW
23 Oct, 00:005,454 MW5,405 MW
23 Oct, 01:005,415 MW5,230 MW
23 Oct, 02:005,180 MW5,163 MW
23 Oct, 03:005,239 MW5,223 MW
23 Oct, 04:005,346 MW5,345 MW
23 Oct, 05:005,497 MW5,480 MW
23 Oct, 06:005,902 MW5,905 MW
23 Oct, 07:006,687 MW6,560 MW
23 Oct, 08:007,134 MW7,033 MW
23 Oct, 09:007,174 MW7,088 MW
23 Oct, 10:006,933 MW6,865 MW
23 Oct, 11:006,569 MW6,615 MW
23 Oct, 12:006,271 MW6,445 MW
23 Oct, 13:006,475 MW6,350 MW
23 Oct, 14:006,200 MW6,295 MW
23 Oct, 15:006,029 MW6,288 MW
23 Oct, 16:006,274 MW6,425 MW
23 Oct, 17:006,635 MW6,723 MW
23 Oct, 18:007,011 MW7,050 MW
23 Oct, 19:007,259 MW7,290 MW
23 Oct, 20:007,130 MW7,220 MW
23 Oct, 21:006,901 MW6,818 MW
23 Oct, 22:006,221 MW6,318 MW
23 Oct, 23:005,803 MW5,823 MW
24 Oct, 00:005,514 MW5,450 MW
24 Oct, 01:005,343 MW5,268 MW
24 Oct, 02:005,209 MW5,155 MW
24 Oct, 03:005,161 MW5,203 MW
24 Oct, 04:005,171 MW5,250 MW
24 Oct, 05:005,202 MW5,273 MW
24 Oct, 06:005,302 MW5,400 MW
24 Oct, 07:005,611 MW5,705 MW
24 Oct, 08:005,821 MW5,930 MW
24 Oct, 09:005,712 MW5,803 MW
24 Oct, 10:005,353 MW5,385 MW
24 Oct, 11:005,001 MW4,998 MW
24 Oct, 12:004,654 MW4,733 MW
24 Oct, 13:004,505 MW4,650 MW
24 Oct, 14:004,497 MW4,653 MW
24 Oct, 15:004,589 MW4,803 MW
24 Oct, 16:004,947 MW5,303 MW
24 Oct, 17:005,770 MW6,000 MW
24 Oct, 18:006,425 MW6,548 MW
24 Oct, 19:006,740 MW6,850 MW
24 Oct, 20:006,651 MW6,758 MW
24 Oct, 21:006,350 MW6,425 MW
24 Oct, 22:005,884 MW5,903 MW
24 Oct, 23:005,440 MW5,543 MW
25 Oct, 00:005,135 MW5,075 MW
25 Oct, 01:004,963 MW4,853 MW
25 Oct, 02:004,841 MW4,720 MW
25 Oct, 03:00n/a4,635 MW
25 Oct, 03:00n/a4,603 MW
25 Oct, 04:00n/a4,618 MW
25 Oct, 05:004,785 MW4,708 MW
25 Oct, 06:004,934 MW4,893 MW
25 Oct, 07:005,004 MW5,085 MW
25 Oct, 08:004,913 MW5,213 MW
25 Oct, 09:00n/a5,160 MW
25 Oct, 10:00n/a4,950 MW
25 Oct, 11:004,152 MW4,745 MW
25 Oct, 12:004,042 MW4,613 MW
25 Oct, 13:004,110 MW4,605 MW
25 Oct, 14:004,299 MW4,743 MW
25 Oct, 15:004,647 MW5,035 MW
25 Oct, 16:005,262 MW5,488 MW
25 Oct, 17:005,894 MW6,053 MW
25 Oct, 18:006,192 MW6,345 MW
25 Oct, 19:006,187 MW6,350 MW
25 Oct, 20:006,042 MW6,188 MW
25 Oct, 21:005,771 MW5,868 MW
25 Oct, 22:005,354 MW5,455 MW
25 Oct, 23:005,074 MW5,100 MW
26 Oct, 00:004,856 MW4,928 MW
26 Oct, 01:004,911 MW4,758 MW
26 Oct, 02:004,815 MW4,703 MW
26 Oct, 03:004,729 MW4,773 MW
26 Oct, 04:004,765 MW4,858 MW
26 Oct, 05:004,979 MW4,993 MW
26 Oct, 06:005,544 MW5,593 MW
26 Oct, 07:006,100 MW6,325 MW
26 Oct, 08:006,395 MW6,718 MW
26 Oct, 09:006,347 MW6,650 MW
26 Oct, 10:006,188 MW6,415 MW
26 Oct, 11:006,368 MW6,163 MW
26 Oct, 12:006,467 MW6,048 MW
26 Oct, 13:006,532 MW6,008 MW
26 Oct, 14:006,698 MW6,010 MW
26 Oct, 15:006,698 MW6,178 MW
26 Oct, 16:006,812 MW6,595 MW
26 Oct, 17:007,182 MW7,058 MW
26 Oct, 18:007,269 MW7,275 MW
26 Oct, 19:007,197 MW7,218 MW
26 Oct, 20:006,969 MW6,953 MW
26 Oct, 21:006,603 MW6,543 MW
26 Oct, 22:006,088 MW6,080 MW
26 Oct, 23:005,731 MW5,635 MW
27 Oct, 00:005,462 MW5,405 MW
27 Oct, 01:005,482 MW5,283 MW
27 Oct, 02:005,229 MW5,200 MW
27 Oct, 03:005,162 MW5,183 MW
27 Oct, 04:005,324 MW5,230 MW
27 Oct, 05:005,463 MW5,420 MW
27 Oct, 06:005,798 MW5,903 MW
27 Oct, 07:006,413 MW6,470 MW
27 Oct, 08:006,814 MW6,753 MW
27 Oct, 09:006,967 MW6,740 MW
27 Oct, 10:006,788 MW6,583 MW
27 Oct, 11:006,743 MW6,480 MW
27 Oct, 12:006,832 MW6,503 MW
27 Oct, 13:006,775 MW6,570 MW
27 Oct, 14:006,847 MW6,573 MW
27 Oct, 15:006,974 MW6,630 MW
27 Oct, 16:007,145 MW6,853 MW
27 Oct, 17:007,327 MW7,250 MW
27 Oct, 18:007,492 MW7,430 MW
27 Oct, 19:007,432 MW7,403 MW
27 Oct, 20:007,200 MW7,220 MW
27 Oct, 21:006,834 MW6,783 MW
27 Oct, 22:006,330 MW6,253 MW
27 Oct, 23:006,027 MW5,843 MW
28 Oct, 00:005,591 MW5,528 MW
28 Oct, 01:005,493 MW5,358 MW
28 Oct, 02:005,455 MW5,273 MW
28 Oct, 03:005,341 MW5,260 MW
28 Oct, 04:005,253 MW5,338 MW
28 Oct, 05:005,461 MW5,530 MW
28 Oct, 06:005,927 MW5,945 MW
28 Oct, 07:006,616 MW6,518 MW
28 Oct, 08:007,181 MW6,985 MW
28 Oct, 09:007,382 MW7,128 MW
28 Oct, 10:007,280 MW7,010 MW
28 Oct, 11:007,336 MW6,910 MW
28 Oct, 12:007,276 MW6,915 MW
28 Oct, 13:007,207 MW6,920 MW
28 Oct, 14:007,078 MW6,910 MW

Assumptions

  • Only hours with both a forecast and a positive demand reading count (681 of 687 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.
Cite this page
APA 7

World Power Monitor. (2026). Romania Demand Forecast Accuracy: Error, Bias and Worst Miss. https://worldpowermonitor.com/forecast-accuracy/ro/

Plain text

World Power Monitor. Romania Demand Forecast Accuracy: Error, Bias and Worst Miss. Data as of 2026-10-28. Data from ENTSO-E Transparency Platform. https://worldpowermonitor.com/forecast-accuracy/ro/

BibTeX 
@misc{wpm_forecast_accuracy_ro_2026,
  title = {{Romania Demand Forecast Accuracy: Error, Bias and Worst Miss}},
  author = {{World Power Monitor}},
  year = {2026},
  note = {Data as of 2026-10-28. Data from ENTSO-E Transparency Platform.},
  url = {https://worldpowermonitor.com/forecast-accuracy/ro/}
}

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