NYISO coincident peak dates
The hour that set each year's ICAP tags: one settled statewide peak per season. Four summers, three different months, never a weekend — which is why the season has to be watched, not guessed.
| Season | Peak day | Hour | NYCA load |
|---|---|---|---|
| 2025 | 2025-06-24 · Tuesday | 6–7 PM ET | 31.9 GW |
| 2024 | 2024-07-08 · Monday | 5–6 PM ET | 29.0 GW |
| 2023 | 2023-09-06 · Wednesday | 5–6 PM ET | 30.2 GW |
| 2022 | 2022-07-20 · Wednesday | 5–6 PM ET | 30.5 GW |
Source: NYISO settled hourly integrated load, all 11 zones summed. Loads are the peak hour's integrated NYCA total, rounded. Free to republish with a link: "Peak data by WattMarkets".
The 2026 season, live
The current hour to beat and today's chance of beating it are on the live NYISO dashboard, updated through the season. What an avoided tag is worth is on the ICAP explainer.