Live market data
ISO-NE wind forecast
ISO-NE's published wind forecast against actual output over the next day — a modest onshore fleet now, and the leading edge of the US offshore build-out.
Fetching the latest published forecast…
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ISO-NE's published wind forecast against actual output over the next day — a modest onshore fleet now, and the leading edge of the US offshore build-out.
How much wind power will New England get?
ISO-NE wind output peaks at 896 MW on Sun, 6 PM, against a low of 95 MW — a swing of 801 MW across the window. Wind forecast is the heaviest area at 896 MW.
Every line above, and who produced it.
What settled — the realized values every forecast here is scored against.
The grid operator's own published forecast for these hours. Source: ISO New England.
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) |
|---|---|---|---|---|
| Wind forecast | 896 | Sun, 6 PM | 95 | 364 |
| Wind settled (recent) | 843 | Thu, 9 PM | 223 | 547 |
| Forecast | Produced by | Method | Horizon |
|---|---|---|---|
| Wind forecast | ISO New England | ISO-NE seven-day wind power forecast and actual wind output | 7 days ahead, hourly |
ISO-NE publishes a point forecast with no confidence interval. Ridge-line icing and nor'easter dynamics make winter the hard season for this forecast.
ISO-NE publishes a wind power forecast from its seven-day forecast process, and this page plots the whole of it against actual output from the fleet. The recent overlapping hours are scored below, so the forecast's track record is visible rather than asserted.
New England's operating wind fleet is a couple of gigawatts, mostly ridge-line projects in Maine, New Hampshire, and Vermont. The transformation is offshore: Vineyard Wind and the projects behind it in the federal lease areas south of Martha's Vineyard are beginning to deliver — and offshore capacity factors will make wind a materially bigger part of this page every year.
In a gas-constrained market, every megawatt of wind on a winter evening is a megawatt of pipeline gas not burned for power. Wind's correlation with winter storms makes its forecast part of New England's reliability arithmetic, not just its energy mix.
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.
About two gigawatts onshore, mostly in Maine, New Hampshire, and Vermont — plus the first large offshore projects now delivering from the lease areas south of Martha's Vineyard, which will multiply the fleet over the coming years.
Geography: the region has limited onshore wind resources and no in-region gas production, but some of the best offshore wind waters in the country a short cable-run from its load centers. Offshore wind is the region's largest domestic supply option.
The scorecard above measures the recent record directly. Winter is the hard season — icing and fast-moving coastal storms move output in ways the forecast cycle struggles to time.
Plotted window Aug 28, 4:00 AM EDT → Sep 3, 10:00 AM EDT. Updated daily by ISO-NE; the latest vintage is shown.
| Sat, 8/29 |
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| Sun, 8/30 |
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| Mon, 8/31 |
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| Tue, 9/1 |
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| Wed, 9/2 |
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| Thu, 9/3 |
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Darkest cells are the tightest hours. The window peaks at 896 MW on Sun, 6 PM, local to the market.