ERCOT 4CP · 2025
The four coincident peaks of summer 2025, with dates, peak hours, and system load.
| Month | Peak day | Peak hour (CT) | System load |
|---|---|---|---|
| June | Thu, Jun 19 | 4:00 PM CT | 77.4 GW |
| July | Wed, Jul 30 | 5:00 PM CT | 81.7 GW |
| August | Mon, Aug 18 | 5:00 PM CT | 83.7 GW |
| September | Thu, Sep 4 | 5:00 PM CT | 79.9 GW |
Source: ERCOT official settled hourly load (post-settlement). Peak hour shown at hourly resolution; ERCOT's official 15-minute 4CP intervals are published after final settlement — see methodology. Free to republish with a link: "Peak data by WattMarkets".