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Data as of 2026-10-27
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Built 2026-10-28 (28 October 2026)

ISO-NE Daily Load Shape and Duck Curve by Hour, 29 September to 27 October 2026

In the 29 complete local days from 29 September to 27 October 2026, electricity demand in ISO-NE averaged 11,440 MW and typically peaked at 18:00 local time (14,051 MW) and bottomed out at 12:00 (10,021 MW). With solar and wind taken off, the remaining load fell to 8,213 MW at 12:00 and then rose 3,365 MW between 14:00 to 17:00. Hours are local clock time (America/New_York).

Key Facts

  • Over 29 complete local days from 29 September to 27 October 2026, average demand in ISO-NE was 11,440 MW. The hour of the day with the highest average demand was 18:00 local time (14,051 MW) and the lowest was 12:00 (10,021 MW).
  • The largest three hour rise in average demand was 2,982 MW, between 15:00 to 18:00 local time.
  • The single highest hour of demand in the 30 day window was 15,866 MW, in the hour starting 2 Oct 2026, 17:00 EDT (UTC-04:00).
  • Solar output averaged 810 MW at its 12:00 peak, 7% of average demand.
  • Demand minus solar and wind (net load) averaged 9,989 MW, fell to 8,213 MW at 12:00 and rose 3,365 MW over the three hours from 14:00 to 17:00, 29% of average demand.

Average Day by Local Hour

29 days to 2026-10-27, America/New_York time
ISO-NE average demand and net generation by local hour Average electricity demand in ISO-NE by local clock hour over 29 complete local days from 29 September to 27 October 2026. It was lowest at 12:00 (10,021 MW) and highest at 18:00 (14,051 MW). Net generation is the power produced inside the grid, so it differs from demand by net imports. 0 3,750 7,500 11,250 15,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average electricity demand in ISO-NE by local clock hour over 29 complete local days from 29 September to 27 October 2026. It was lowest at 12:00 (10,021 MW) and highest at 18:00 (14,051 MW). Net generation is the power produced inside the grid, so it differs from demand by net imports.
Mean MW by local hour, 2026-09-29 to 2026-10-27
ISO-NE average demand and net generation by local hour
Local hour (America/New_York)DemandNet generation
00:0010,686 MW10,736 MW
01:0010,447 MW10,470 MW
02:0010,318 MW10,275 MW
03:0010,280 MW10,243 MW
04:0010,378 MW10,379 MW
05:0010,768 MW10,817 MW
06:0011,700 MW11,716 MW
07:0012,301 MW12,301 MW
08:0011,851 MW11,975 MW
09:0010,987 MW11,167 MW
10:0010,382 MW10,876 MW
11:0010,066 MW10,692 MW
12:0010,021 MW10,714 MW
13:0010,166 MW10,816 MW
14:0010,527 MW11,062 MW
15:0011,069 MW11,552 MW
16:0012,127 MW12,463 MW
17:0013,421 MW13,726 MW
18:0014,051 MW14,311 MW
19:0013,910 MW14,069 MW
20:0013,422 MW13,434 MW
21:0012,726 MW12,740 MW
22:0011,851 MW11,842 MW
23:0011,100 MW11,167 MW
ISO-NE duck curve: demand and net load by local hour Average demand and net load (demand minus solar and wind) in ISO-NE by local clock hour over 29 complete local days from 29 September to 27 October 2026. Net load was lowest at 12:00 (8,213 MW) and then rose 3,365 MW between 14:00 to 17:00. 0 3,750 7,500 11,250 15,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average demand and net load (demand minus solar and wind) in ISO-NE by local clock hour over 29 complete local days from 29 September to 27 October 2026. Net load was lowest at 12:00 (8,213 MW) and then rose 3,365 MW between 14:00 to 17:00.
Mean MW by local hour, 2026-09-29 to 2026-10-27
ISO-NE duck curve: demand and net load by local hour
Local hour (America/New_York)DemandNet load (demand minus solar and wind)
00:0010,686 MW9,429 MW
01:0010,447 MW9,213 MW
02:0010,318 MW9,082 MW
03:0010,280 MW9,012 MW
04:0010,378 MW9,072 MW
05:0010,768 MW9,456 MW
06:0011,700 MW10,407 MW
07:0012,301 MW10,973 MW
08:0011,851 MW10,353 MW
09:0010,987 MW9,288 MW
10:0010,382 MW8,591 MW
11:0010,066 MW8,260 MW
12:0010,021 MW8,213 MW
13:0010,166 MW8,342 MW
14:0010,527 MW8,733 MW
15:0011,069 MW9,431 MW
16:0012,127 MW10,676 MW
17:0013,421 MW12,097 MW
18:0014,051 MW12,711 MW
19:0013,910 MW12,521 MW
20:0013,422 MW12,067 MW
21:0012,726 MW11,423 MW
22:0011,851 MW10,585 MW
23:0011,100 MW9,809 MW
ISO-NE average solar and wind output by local hour Average solar and wind generation in ISO-NE by local clock hour over 29 complete local days from 29 September to 27 October 2026. Solar peaked at 12:00 at 810 MW. 0 375 750 1,125 1,500 00:0003:0006:0009:0012:0015:0018:0021:00
Average solar and wind generation in ISO-NE by local clock hour over 29 complete local days from 29 September to 27 October 2026. Solar peaked at 12:00 at 810 MW.
Mean MW by local hour, 2026-09-29 to 2026-10-27
ISO-NE average solar and wind output by local hour
Local hour (America/New_York)SolarWind
00:002 MW1,256 MW
01:002 MW1,232 MW
02:002 MW1,234 MW
03:002 MW1,267 MW
04:002 MW1,304 MW
05:002 MW1,310 MW
06:002 MW1,291 MW
07:0045 MW1,283 MW
08:00273 MW1,225 MW
09:00553 MW1,146 MW
10:00721 MW1,069 MW
11:00797 MW1,009 MW
12:00810 MW998 MW
13:00768 MW1,055 MW
14:00703 MW1,091 MW
15:00553 MW1,085 MW
16:00341 MW1,111 MW
17:00130 MW1,194 MW
18:0059 MW1,280 MW
19:0030 MW1,359 MW
20:003 MW1,352 MW
21:002 MW1,301 MW
22:003 MW1,264 MW
23:003 MW1,289 MW
Average ISO-NE demand, net generation, solar, wind and net load by local hour
Local hourDemandNet generationSolarWindNet load
00:00 10,686 MW 10,736 MW 2 MW 1,256 MW 9,429 MW
01:00 10,447 MW 10,470 MW 2 MW 1,232 MW 9,213 MW
02:00 10,318 MW 10,275 MW 2 MW 1,234 MW 9,082 MW
03:00 10,280 MW 10,243 MW 2 MW 1,267 MW 9,012 MW
04:00 10,378 MW 10,379 MW 2 MW 1,304 MW 9,072 MW
05:00 10,768 MW 10,817 MW 2 MW 1,310 MW 9,456 MW
06:00 11,700 MW 11,716 MW 2 MW 1,291 MW 10,407 MW
07:00 12,301 MW 12,301 MW 45 MW 1,283 MW 10,973 MW
08:00 11,851 MW 11,975 MW 273 MW 1,225 MW 10,353 MW
09:00 10,987 MW 11,167 MW 553 MW 1,146 MW 9,288 MW
10:00 10,382 MW 10,876 MW 721 MW 1,069 MW 8,591 MW
11:00 10,066 MW 10,692 MW 797 MW 1,009 MW 8,260 MW
12:00 10,021 MW 10,714 MW 810 MW 998 MW 8,213 MW
13:00 10,166 MW 10,816 MW 768 MW 1,055 MW 8,342 MW
14:00 10,527 MW 11,062 MW 703 MW 1,091 MW 8,733 MW
15:00 11,069 MW 11,552 MW 553 MW 1,085 MW 9,431 MW
16:00 12,127 MW 12,463 MW 341 MW 1,111 MW 10,676 MW
17:00 13,421 MW 13,726 MW 130 MW 1,194 MW 12,097 MW
18:00 14,051 MW 14,311 MW 59 MW 1,280 MW 12,711 MW
19:00 13,910 MW 14,069 MW 30 MW 1,359 MW 12,521 MW
20:00 13,422 MW 13,434 MW 3 MW 1,352 MW 12,067 MW
21:00 12,726 MW 12,740 MW 2 MW 1,301 MW 11,423 MW
22:00 11,851 MW 11,842 MW 3 MW 1,264 MW 10,585 MW
23:00 11,100 MW 11,167 MW 3 MW 1,289 MW 9,809 MW

Each value is the mean over 29 complete local days from 29 September to 27 October 2026, weekdays and weekends together, for the hour starting at that local clock time. Net load is demand minus solar and wind generation. The single highest hour of demand in the whole 30 day window was 15,866 MW; it is a published reading, not an average, and is not part of the profile above.

Source: U.S. Energy Information Administration (EIA). (US Government work, public domain) Data as of 2026-10-27. Profiles are computed by World Power Monitor from the operator's hourly series.

Assumptions

  • Hours are local clock time in America/New_York. A local day is used only if it is whole inside the 30 day window and at least 22 of its hours are complete; the profile uses the 29 most recent such days. Daylight saving follows the local clock: on a clock change day the missing hour is absent and the repeated hour is averaged over both readings.
  • The average mixes weekdays and weekends and covers only 29 days, so it describes recent conditions, not a seasonal norm.
  • The evening ramp is the largest rise over three hours in the average profile, starting between 14:00 and 20:00 local time.
Cite this page
APA 7

World Power Monitor. (2026). ISO-NE Daily Load Shape and Duck Curve by Hour. https://worldpowermonitor.com/load-shapes/iso-ne/

Plain text

World Power Monitor. ISO-NE Daily Load Shape and Duck Curve by Hour. Data as of 2026-10-27. Data from U.S. Energy Information Administration. https://worldpowermonitor.com/load-shapes/iso-ne/

BibTeX 
@misc{wpm_load_shapes_iso_ne_2026,
  title = {{ISO-NE Daily Load Shape and Duck Curve by Hour}},
  author = {{World Power Monitor}},
  year = {2026},
  note = {Data as of 2026-10-27. Data from U.S. Energy Information Administration.},
  url = {https://worldpowermonitor.com/load-shapes/iso-ne/}
}

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