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ISO-NE Wind Generation Up 68% in 2026 as Regional Capacity Grows 47%

person Sarah Mitchell

calendar_today October 16, 2026 at 6:50 AM

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Summary

Wind generation in ISO New England averaged 68% higher in the first nine months of 2026 than the same period in 2025, with September hitting a monthly record of 668.9 GWh. The jump follows a 47% increase in regional wind capacity so far this year, bringing installed capacity to 2.5 gigawatts.

Monthly wind generation in the first nine months of 2026 was an average of 68% higher compared with the same period in 2025 in ISO New England (ISO-NE):

Monthly generation from wind was highest in September of this year at 668.9 gigawatthours (GWh), more than double generation levels from September 2025 and nearly 10% higher than this year’s previous high in March.
Increased wind generation is the result of growing capacity additions in the ISO-NE region. Regional wind capacity increased 47% so far in 2026 to 2.5 gigawatts, following a 12% increase in capacity in 2025.
Daily wind generation peaked on October 6, 2026, at about 47.3 GWh, 1% higher than the previous peak that occurred on September 10, 2026.
Total wind generation for the first nine months of 2026 was 4,619 GWh, 1.9% more than last year’s annual total of 4,533 GWh.

Article from Today in Energy. Principal contributor: Alex Mey