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Built 2026-10-28 (28 October 2026)

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

The day-ahead demand forecast for Switzerland was off by 2.5% on average (mean absolute percentage error) over 685 hours from 30 September to 28 October 2026, and 84% of hours landed within 5% of the reading. Its bias was +0.2%: it ran close to balanced on average. The largest miss was 1,609 MW (25.2%) too high at 17 Oct 2026, 15:00 CEST (UTC+02:00). Dates and times are local (Europe/Zurich).

Key Facts

  • The day-ahead demand forecast for Switzerland was off by 2.5% on average (mean absolute percentage error) over 685 hours from 30 September to 28 October 2026, and 84% of hours landed within 5% of the reading. Its bias was +0.2%: it ran close to balanced on average. The largest miss was 1,609 MW (25.2%) too high at 17 Oct 2026, 15:00 CEST (UTC+02:00).
  • Across 47 European bidding zones ranked by average error over their own latest 30 day windows, Switzerland came 14 (1 is the smallest error).
  • On average the forecast differed from reported demand by 171 MW, against average demand of 7,022 MW.
  • The forecast was above reported demand in 55% of compared hours.

Forecast Error at a Glance

685 hours from 30 September to 28 October 2026
Average error2.5%
Bias+0.2%
Hours within 5%84%
Worst miss1,609 MW

Average error is the mean absolute percentage gap between the forecast and reported demand. Bias is the signed mean (+5 MW per hour on average): the forecast ran close to balanced on average. The worst miss was 1,609 MW (25.2%) too high at 17 Oct 2026, 15:00 CEST (UTC+02:00): forecast 8,007 MW, reported 6,397 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, 12:00 CET (UTC+01:00)
Switzerland day-ahead demand forecast and reported demand by hour Hourly reported demand and the day-ahead forecast for Switzerland over the last 7 days of the window, to 28 Oct 2026, 12:00 CET (UTC+01:00). Gaps are hours with a missing, zero or implausible report. 0 2,500 5,000 7,500 10,000 21 Oct, 14:0022 Oct, 14:0023 Oct, 14:0024 Oct, 14:0025 Oct, 13:0026 Oct, 13:0027 Oct, 13:00
Hourly reported demand and the day-ahead forecast for Switzerland over the last 7 days of the window, to 28 Oct 2026, 12:00 CET (UTC+01:00). 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, 14:007,570 MW7,586 MW
21 Oct, 15:007,401 MW7,429 MW
21 Oct, 16:008,379 MW8,378 MW
21 Oct, 17:008,390 MW8,391 MW
21 Oct, 18:008,393 MW8,393 MW
21 Oct, 19:008,395 MW8,395 MW
21 Oct, 20:008,412 MW8,412 MW
21 Oct, 21:008,157 MW8,225 MW
21 Oct, 22:006,761 MW6,662 MW
21 Oct, 23:006,379 MW6,527 MW
22 Oct, 00:006,948 MW6,963 MW
22 Oct, 01:006,586 MW6,463 MW
22 Oct, 02:006,411 MW6,413 MW
22 Oct, 03:006,530 MW6,467 MW
22 Oct, 04:006,202 MW6,262 MW
22 Oct, 05:006,100 MW6,375 MW
22 Oct, 06:006,740 MW6,789 MW
22 Oct, 07:007,416 MW7,435 MW
22 Oct, 08:007,768 MW7,796 MW
22 Oct, 09:007,454 MW7,615 MW
22 Oct, 10:007,589 MW7,603 MW
22 Oct, 11:007,853 MW7,885 MW
22 Oct, 12:007,819 MW7,818 MW
22 Oct, 13:007,638 MW7,609 MW
22 Oct, 14:007,240 MW7,300 MW
22 Oct, 15:007,379 MW7,393 MW
22 Oct, 16:008,522 MW8,619 MW
22 Oct, 17:008,368 MW8,394 MW
22 Oct, 18:008,148 MW8,308 MW
22 Oct, 19:008,145 MW8,145 MW
22 Oct, 20:008,148 MW8,148 MW
22 Oct, 21:008,165 MW8,193 MW
22 Oct, 22:006,933 MW7,194 MW
22 Oct, 23:006,819 MW7,048 MW
23 Oct, 00:006,359 MW6,362 MW
23 Oct, 01:006,690 MW6,667 MW
23 Oct, 02:006,942 MW6,891 MW
23 Oct, 03:005,889 MW5,884 MW
23 Oct, 04:006,510 MW6,510 MW
23 Oct, 05:006,113 MW6,128 MW
23 Oct, 06:007,514 MW7,819 MW
23 Oct, 07:007,499 MW7,500 MW
23 Oct, 08:007,593 MW7,806 MW
23 Oct, 09:007,276 MW7,409 MW
23 Oct, 10:007,439 MW7,421 MW
23 Oct, 11:007,372 MW7,457 MW
23 Oct, 12:007,353 MW7,364 MW
23 Oct, 13:007,455 MW7,349 MW
23 Oct, 14:007,436 MW7,281 MW
23 Oct, 15:007,444 MW7,398 MW
23 Oct, 16:008,014 MW8,045 MW
23 Oct, 17:007,975 MW8,028 MW
23 Oct, 18:007,961 MW7,961 MW
23 Oct, 19:007,957 MW7,957 MW
23 Oct, 20:007,956 MW7,957 MW
23 Oct, 21:007,507 MW7,545 MW
23 Oct, 22:006,761 MW6,693 MW
23 Oct, 23:005,812 MW6,037 MW
24 Oct, 00:005,944 MW6,164 MW
24 Oct, 01:006,111 MW6,111 MW
24 Oct, 02:006,063 MW6,135 MW
24 Oct, 03:006,091 MW6,071 MW
24 Oct, 04:006,087 MW6,071 MW
24 Oct, 05:006,139 MW6,130 MW
24 Oct, 06:006,120 MW6,102 MW
24 Oct, 07:006,106 MW6,113 MW
24 Oct, 08:006,134 MW6,134 MW
24 Oct, 09:006,305 MW6,311 MW
24 Oct, 10:006,333 MW6,336 MW
24 Oct, 11:006,458 MW6,461 MW
24 Oct, 12:006,530 MW6,550 MW
24 Oct, 13:006,575 MW6,569 MW
24 Oct, 14:006,551 MW6,519 MW
24 Oct, 15:006,528 MW6,488 MW
24 Oct, 16:006,598 MW6,582 MW
24 Oct, 17:006,482 MW6,473 MW
24 Oct, 18:006,508 MW6,507 MW
24 Oct, 19:006,513 MW6,513 MW
24 Oct, 20:006,508 MW6,510 MW
24 Oct, 21:006,459 MW6,455 MW
24 Oct, 22:006,281 MW6,291 MW
24 Oct, 23:006,103 MW6,112 MW
25 Oct, 00:006,109 MW6,110 MW
25 Oct, 01:006,278 MW6,090 MW
25 Oct, 02:006,210 MW6,220 MW
25 Oct, 02:006,912 MW7,094 MW
25 Oct, 03:006,859 MW6,617 MW
25 Oct, 04:006,621 MW6,733 MW
25 Oct, 05:006,818 MW6,697 MW
25 Oct, 06:006,864 MW6,988 MW
25 Oct, 07:006,759 MW6,794 MW
25 Oct, 08:007,017 MW6,922 MW
25 Oct, 09:006,959 MW7,028 MW
25 Oct, 10:006,735 MW6,803 MW
25 Oct, 11:007,550 MW6,855 MW
25 Oct, 12:007,252 MW6,916 MW
25 Oct, 13:007,090 MW6,867 MW
25 Oct, 14:007,294 MW6,637 MW
25 Oct, 15:006,986 MW6,946 MW
25 Oct, 16:006,851 MW6,797 MW
25 Oct, 17:006,826 MW7,078 MW
25 Oct, 18:006,939 MW7,200 MW
25 Oct, 19:007,149 MW6,831 MW
25 Oct, 20:007,600 MW7,275 MW
25 Oct, 21:007,265 MW7,021 MW
25 Oct, 22:007,591 MW7,956 MW
25 Oct, 23:006,813 MW7,162 MW
26 Oct, 00:007,037 MW7,457 MW
26 Oct, 01:006,929 MW6,944 MW
26 Oct, 02:006,906 MW6,919 MW
26 Oct, 03:006,906 MW6,921 MW
26 Oct, 04:007,405 MW7,651 MW
26 Oct, 05:007,694 MW7,152 MW
26 Oct, 06:007,270 MW7,874 MW
26 Oct, 07:007,813 MW7,748 MW
26 Oct, 08:007,454 MW7,383 MW
26 Oct, 09:008,410 MW8,065 MW
26 Oct, 10:008,054 MW8,315 MW
26 Oct, 11:008,205 MW8,205 MW
26 Oct, 12:007,701 MW7,654 MW
26 Oct, 13:008,198 MW8,173 MW
26 Oct, 14:008,090 MW8,075 MW
26 Oct, 15:008,201 MW8,205 MW
26 Oct, 16:008,073 MW8,103 MW
26 Oct, 17:008,285 MW8,317 MW
26 Oct, 18:008,549 MW8,588 MW
26 Oct, 19:008,557 MW8,638 MW
26 Oct, 20:008,410 MW8,525 MW
26 Oct, 21:008,158 MW7,912 MW
26 Oct, 22:008,072 MW7,891 MW
26 Oct, 23:007,057 MW7,190 MW
27 Oct, 00:007,261 MW7,405 MW
27 Oct, 01:007,048 MW7,184 MW
27 Oct, 02:007,122 MW7,142 MW
27 Oct, 03:007,124 MW7,118 MW
27 Oct, 04:007,171 MW7,172 MW
27 Oct, 05:007,163 MW7,192 MW
27 Oct, 06:007,436 MW7,154 MW
27 Oct, 07:007,733 MW7,719 MW
27 Oct, 08:007,999 MW7,977 MW
27 Oct, 09:007,969 MW8,175 MW
27 Oct, 10:007,986 MW8,059 MW
27 Oct, 11:007,487 MW7,716 MW
27 Oct, 12:007,406 MW7,430 MW
27 Oct, 13:007,038 MW7,071 MW
27 Oct, 14:007,156 MW7,254 MW
27 Oct, 15:007,184 MW7,238 MW
27 Oct, 16:007,630 MW7,649 MW
27 Oct, 17:007,763 MW7,863 MW
27 Oct, 18:008,177 MW8,180 MW
27 Oct, 19:008,214 MW8,225 MW
27 Oct, 20:008,292 MW8,296 MW
27 Oct, 21:007,987 MW7,611 MW
27 Oct, 22:007,805 MW7,918 MW
27 Oct, 23:007,001 MW6,960 MW
28 Oct, 00:006,964 MW7,059 MW
28 Oct, 01:006,704 MW6,662 MW
28 Oct, 02:006,745 MW6,826 MW
28 Oct, 03:007,214 MW7,313 MW
28 Oct, 04:006,626 MW6,565 MW
28 Oct, 05:007,298 MW7,322 MW
28 Oct, 06:007,050 MW7,019 MW
28 Oct, 07:007,480 MW7,413 MW
28 Oct, 08:007,358 MW7,926 MW
28 Oct, 09:007,477 MW7,620 MW
28 Oct, 10:007,683 MW7,799 MW
28 Oct, 11:008,139 MW7,846 MW
28 Oct, 12:007,890 MW7,890 MW

Assumptions

  • Only hours with both a forecast and a positive demand reading count (685 of 685 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). Switzerland Demand Forecast Accuracy: Error, Bias and Worst Miss. https://worldpowermonitor.com/forecast-accuracy/ch/

Plain text

World Power Monitor. Switzerland 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/ch/

BibTeX 
@misc{wpm_forecast_accuracy_ch_2026,
  title = {{Switzerland 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/ch/}
}

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