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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
March 25, 2026 03/23/2026 04:41 PM EDT CSV
March 11, 2026 03/11/2026 05:24 PM EDT CSV
March 12, 2026 03/12/2026 04:50 PM EDT CSV
March 13, 2026 03/13/2026 04:39 PM EDT CSV
March 14, 2026 03/14/2026 04:35 PM EDT CSV
March 15, 2026 03/15/2026 04:43 PM EDT CSV
March 16, 2026 03/16/2026 05:26 PM EDT CSV
March 17, 2026 03/17/2026 04:19 PM EDT CSV
March 18, 2026 03/18/2026 04:14 PM EDT CSV
March 19, 2026 03/19/2026 04:44 PM EDT CSV
March 20, 2026 03/20/2026 04:34 PM EDT CSV
March 21, 2026 03/21/2026 04:35 PM EDT CSV
March 22, 2026 03/22/2026 04:31 PM EDT CSV
March 24, 2026 03/23/2026 04:41 PM EDT CSV
March 23, 2026 03/23/2026 04:41 PM EDT CSV