NYISO ICAP · 2025
The single coincident peak of summer 2025, with its date, hour, and NYCA load — the hour that set ICAP tags for the following capability year.
| Rank | Peak day | Peak hour (ET) | System load |
|---|---|---|---|
| cp1 | Tue, Jun 24 | 6:00 PM ET | 31.9 GW |
Source: NYISO settled hourly integrated load, observed, all 11 zones summed. NYISO's official determination settles from verified metered data after the capability year. Weekends and NERC holidays have never held the peak. See methodology. Free to republish with a link: "Peak data by WattMarkets".