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Three-Day Reliability Region Demand Forecast

Download the ISO's hourly demand forecast for each day as forecasted in-day and the preceding two days, broken down by reliability region. The region's transmission system is divided into eight reliability regions that reflect the system's operating characteristics and major constraints. New England's load zones, which represent aggregations of pricing nodes within specific areas, generally correspond to these reliability regions.

 

Note: NEMASSBOST = Northeast Massachusetts and Boston Area Reliability Region; SEMASS = Southeast Massachusetts Reliability Region; WCMASS = Western/Central Massachusetts Reliability Region; % = the reliability region's demand as a percentage of the zonal total. The demand included in the forecast is in megawatts (MW).

Forecasts prior to May 24, 2017, can be found on the Three-Day Reliability Region Demand Forecast Archive.

 

 
Three-Day Reliability Region Demand Forecast
Description Timestamp Download
June 20, 2026 06/18/2026 11:24 AM EDT CSV
June 06, 2026 06/06/2026 04:58 PM EDT CSV
June 07, 2026 06/07/2026 04:56 PM EDT CSV
June 08, 2026 06/08/2026 07:53 PM EDT CSV
June 09, 2026 06/09/2026 06:56 PM EDT CSV
June 10, 2026 06/10/2026 04:45 PM EDT CSV
June 11, 2026 06/11/2026 04:49 PM EDT CSV
June 12, 2026 06/12/2026 04:18 PM EDT CSV
June 13, 2026 06/13/2026 04:19 PM EDT CSV
June 14, 2026 06/14/2026 04:48 PM EDT CSV
June 15, 2026 06/15/2026 04:39 PM EDT CSV
June 16, 2026 06/16/2026 04:44 PM EDT CSV
June 17, 2026 06/17/2026 04:48 PM EDT CSV
June 19, 2026 06/18/2026 11:24 AM EDT CSV
June 18, 2026 06/18/2026 11:24 AM EDT CSV