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…
01
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 13,652 MW on Mon, 7 PM, against a low of 6,794 MW — a swing of 6,859 MW across the window. Net load is the heaviest area at 13,652 MW.
Every line above, and who produced it.
An Ask the Grid calculation from the published forecast inputs shown here. Source: ISO New England (composed by Ask the Grid).
A published forecast for the plotted target intervals. Source: ISO New England (composed by Ask the Grid).
A published forecast for the plotted target intervals. Source: ISO New England (composed by Ask the Grid).
Each day of the window on its own.
Every hour of the window, shaded by load.
| Series | Peak (MW) | Peak hour | Low (MW) | Average (MW) |
|---|---|---|---|---|
| Net load | 13,652 | Mon, 7 PM | 6,794 | 9,857 |
| Gross demand | 14,344 | Mon, 6 PM | 9,196 | 11,155 |
| Wind + solar | 2,402 | Mon, 12 PM | 499 | 1,298 |
| Series | Produced by | Method | Horizon | Issued |
|---|---|---|---|---|
| Net load forecast | ISO New England (composed by Ask the Grid) | Ask the Grid calculation from published forecast inputs | As far as all three published forecasts overlap, hourly | Recomputed from the plotted inputs |
| Gross demand 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 | Issue time not exposed by this feed |
| 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 | Issue time not exposed by this feed |
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 Oct 12, 6:00 AM EDT → Oct 13, 4:00 AM EDT. Recomputed whenever any of the three inputs is republished. Source snapshot Oct 12, 5:40 AM EDT.