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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
September 01, 2026 08/30/2026 04:25 PM EDT CSV
August 18, 2026 08/18/2026 04:25 PM EDT CSV
August 19, 2026 08/19/2026 04:29 PM EDT CSV
August 20, 2026 08/20/2026 04:34 PM EDT CSV
August 21, 2026 08/21/2026 04:48 PM EDT CSV
August 22, 2026 08/22/2026 04:29 PM EDT CSV
August 23, 2026 08/23/2026 04:58 PM EDT CSV
August 24, 2026 08/24/2026 04:34 PM EDT CSV
August 25, 2026 08/25/2026 04:38 PM EDT CSV
August 26, 2026 08/26/2026 04:37 PM EDT CSV
August 27, 2026 08/27/2026 06:55 PM EDT CSV
August 28, 2026 08/28/2026 04:25 PM EDT CSV
August 29, 2026 08/29/2026 04:28 PM EDT CSV
August 30, 2026 08/30/2026 04:25 PM EDT CSV
August 31, 2026 08/30/2026 04:25 PM EDT CSV