Live market data
ISO-NE net load forecast
ISO New England's own demand, wind, and solar forecasts, combined into the number generators actually plan against — with every input shown alongside it.
Fetching the latest published forecast…
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ISO New England's own demand, wind, and solar forecasts, combined into the number generators actually plan against — with every input shown alongside it.
What does New England's fleet actually have to serve?
ISO-NE net load peaks at 17,910 MW on Fri, 6 PM, against a low of 11,193 MW — a swing of 6,717 MW across the window. Net load is the heaviest area at 17,910 MW.
Every line above, and who produced it.
The grid operator's own published forecast for these hours. Source: ISO New England (composed by Ask the Grid).
What settled — the realized values every forecast here is scored against.
Generating capacity expected to be available to serve demand.
Each day of the window on its own.
Every hour of the window, shaded by load.
| 0 | 6 | 12 | 18 | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fri, 8/28 |
| Series | Peak (MW) | Peak hour | Low (MW) | Average (MW) |
|---|---|---|---|---|
| Net load | 17,910 | Fri, 6 PM | 11,193 | 14,591 |
| Gross demand | 18,537 | Fri, 6 PM | 11,642 | 15,156 |
| Wind + solar | 1,010 | Fri, 2 PM | 237 | 565 |
| Forecast | Produced by | Method | Horizon |
|---|---|---|---|
| Net load forecast | ISO New England (composed by Ask the Grid) | ISO-NE load forecast, wind forecast, and solar forecast | As far as all three published forecasts overlap, hourly |
| Wind + solar forecast | ISO New England (composed by Ask the Grid) | ISO-NE load forecast, wind forecast, and solar forecast | As far as all three published forecasts overlap, hourly |
Every input is a point forecast with no confidence interval, and their errors do not cancel — a demand forecast running high and a wind forecast running low both push net load the same way, so this series can be wrong by more than any one of its inputs.
Net load is demand minus wind minus solar — the electricity the dispatchable fleet has to produce once the renewables have delivered what they are expected to. It is not published by ISO New England as a feed; this page composes it from three forecasts that are, and plots all three so the subtraction is visible rather than asserted.
New England's solar is overwhelmingly behind the meter, so it never appears as generation — it appears as demand that did not arrive. Net load makes that visible: the midday dip in this curve is rooftop solar the grid never metered, and the winter evening climb out of it is when a gas-constrained system is at its tightest.
In summer, look for the midday belly. In winter, look at the evening: New England's hardest hours are cold January nights, when heating demand peaks and the same pipelines are serving furnaces and power plants at once.
A net-load point exists only for hours where all three forecasts do. The three feeds have different horizons, so this curve ends wherever the shortest of them ends — it is never extended by holding a wind or solar forecast flat past its own reach, which would invent the number the page exists to state.
curl "https://askthegrid.com/api/v1/grid/series?iso=ISONE&metric=load_forecast&zone=SYSTEM&hours=168" curl "https://askthegrid.com/api/v1/grid/radar/curves?iso=ISONE&horizon=extended"
Connect your agent to mcp.askthegrid.com and this forecast is a tool call away — the same host Claude and ChatGPT connectors already use.
Electricity demand minus the wind and solar expected to serve it. It is what the dispatchable fleet — gas, coal, nuclear, hydro, and batteries — is actually called on to produce, and it is the curve generators and traders plan around rather than demand itself.
It includes the solar ISO-NE forecasts, which is the fleet it can see. Behind-the-meter output is already netted out of the demand forecast — it shows up as demand that never materialised rather than as supply — so the midday dip in this curve is largely rooftop solar by another name.
The three inputs are. The subtraction is ours, and it is stated plainly for that reason: ISO New England publishes a demand forecast, a wind forecast, and a solar forecast, and this page combines them on matched hours without adjusting any of them.
Plotted window Aug 28, 4:00 AM EDT → Aug 29, 3:00 AM EDT. Recomputed whenever any of the three inputs is republished.
| Sat, 8/29 |
|---|
Darkest cells are the tightest hours. The window peaks at 17,910 MW on Fri, 6 PM, local to the market.