Live market data
NYISO load forecast
NYISO's own hourly load forecast for the New York Control Area, plotted against settled demand, with the track record for each forecast published.
Fetching the latest published forecast…
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NYISO's own hourly load forecast for the New York Control Area, plotted against settled demand, with the track record for each forecast published.
How much power will New York need?
NYISO demand peaks at 18,175 MW on Wed, 7 PM, against a low of 11,868 MW — a swing of 6,307 MW across the window. New York City (the five boroughs) is the heaviest area at 6,287 MW, 35% of the system peak.
Explore the forecast in place
Every line above, and who produced it.
Observed or settled values for the plotted intervals. Source: NYISO.
A published forecast for the plotted target intervals. Source: NYISO.
The same window, split by zone — each area’s own curve.
Every hour of the window, shaded by load.
| 0 | 6 | 12 | 18 | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thu, 9/24 |
| Zone | Peak (MW) | Peak hour | Low (MW) | Average (MW) |
|---|---|---|---|---|
| N.Y.C. | 6,287 | Wed, 5 PM | 3,791 | 4,909 |
| LONGIL | 2,507 | Wed, 7 PM | 1,492 | 1,895 |
| WEST | 1,764 | Wed, 7 PM | 1,143 | 1,390 |
| CENTRL | 1,732 | Wed, 7 PM | 873 | 1,317 |
| CAPITL | 1,385 | Wed, 7 PM | 759 | 1,080 |
| GENESE | 1,210 | Wed, 7 PM | 666 | 891 |
| HUD VL | 1,116 | Wed, 7 PM | 646 | 848 |
| MHK VL | 842 | Wed, 7 PM | 274 | 616 |
| DUNWOD | 681 | Wed, 6 PM | 419 | 538 |
| NORTH | ||||
| Forecast | Avg miss (MW) | Avg miss % | Bias | Hours |
|---|---|---|---|---|
| NYISO load forecast (day-ahead) | 264 | 1.9% | −264 | 24 |
Each forecast as it stood 24 hours before the hour it predicted, against what settled. Smaller is better on every column. Bias is signed: positive means the forecast ran high.
| Series | Produced by | Method | Horizon | Issued |
|---|---|---|---|---|
| Forecast demand | NYISO | NYISO load forecast | Forward across NYISO's published forecast window, hourly | Issue time not exposed by this feed |
NYISO publishes the load forecast as a point forecast with no confidence interval. Actual demand routinely differs from it, most on days with unusual weather.
NYISO publishes an hourly forecast of demand across the New York Control Area. This page plots the forward forecast alongside what actually settled, so the two are directly comparable on one axis.
NYISO is a winter-and-summer peaking system with a hard geographic split: most demand sits downstate in New York City and Long Island, while much of the cheap generation sits upstate. The transmission between them is the constraint that shapes both prices and reliability planning.
Summer peaks land in the late afternoon on humid days, driven by air conditioning downstate. Winter peaks are early-morning and evening. The gap between the daily peak and the overnight minimum is the ramp the dispatchable fleet has to deliver.
curl "https://askthegrid.com/api/v1/grid/series?iso=NYISO&metric=load_forecast&zone=SYSTEM&hours=168"
Connect your agent to mcp.askthegrid.com and this forecast is a tool call away — the same host Claude and ChatGPT connectors already use.
It is NYISO's hourly projection of electricity demand across the New York Control Area, used to plan generation commitments and assess reliability.
Summer peaks fall in the late afternoon on hot, humid days, driven by air conditioning in New York City and on Long Island. Winter brings a second peak shape, early morning and again in the evening.
Most demand is downstate while much of the cheaper generation is upstate, and the transmission between them is limited. That constraint is why downstate prices are usually higher and why reliability planning focuses there.
Plotted window Sep 24, 3:00 AM EDT → Sep 30, 11:00 PM EDT. Republished on a rolling basis; the latest vintage for each hour is shown.
| Fri, 9/25 |
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| Sat, 9/26 |
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| Sun, 9/27 |
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| Mon, 9/28 |
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| Tue, 9/29 |
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| Wed, 9/30 |
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Darkest cells are the tightest hours. The window peaks at 18,175 MW on Wed, 7 PM, local to the market.
The scorecard on this page measures it against what settled, over the same hours, with the vintage pinned so the forecast gets no credit for information it did not have at the time.