Regional Outlook — NSW1: Wednesday 27 May 2026

The NSW spot price sits at $138.94/MWh as of 06:30 AEST, well below the overnight peak of $246.97/MWh reached around 09:50 AEST and the sustained run of $231.72/MWh intervals that dominated the 07:30–09:30 AEST window. The 24-hour trend shows a clear evening demand surge driven by total demand climbing to 9,602 MW around 18:30 AEST before gradually easing to the current 7,744 MW. Prices have retreated sharply as demand falls away, with the current interval sitting around $90–$100/MWh below the overnight peaks. Weather conditions are contributing to modest heating demand (0.9 index) with temperatures at 17.1°C, 95% cloud cover, and near-zero solar potential — consistent with a typical late-May overnight-into-morning profile.

The generation mix at 06:30 AEST is dominated by black coal at 5,434 MW, with wind contributing 1,267 MW, hydro 1,226 MW, gas (CCGT) 190 MW, solar 100 MW, battery 2 MW, and gas (OCGT) offline. Total scheduled generation sits at approximately 8,218 MW against 7,745 MW demand, with the balance accounted for by interconnector flows. Renewables — wind, solar, and hydro combined — are contributing approximately 31.6% of the generation mix, up from a trough of around 19–20% during the morning demand peak period (roughly 17:00–19:00 AEST), when coal carried a heavier share of the load. Carbon intensity currently sits at 0.593 tCO2/MWh, down from a high of 0.696 tCO2/MWh recorded during the morning peak around 05:00–06:00 AEST, reflecting the improved renewable share as demand eases overnight.

Pre-dispatch forecasts for the 07:00 AEST half-hour (21:00 UTC) target have converged toward the $147–$148/MWh range in the most recent runs, down sharply from early-day forecasts of $265–$339/MWh for that same interval — indicating the market progressively priced out a significant risk premium as conditions clarified. The 07:30 AEST interval (21:30 UTC) is currently forecast in the $175–$178/MWh range across recent pre-dispatch runs, suggesting prices are expected to lift modestly as the morning demand ramp begins. Load window forecasts for 08:00–10:00 AEST (22:00–00:00 UTC) cluster in the $95–$130/MWh band, before stepping up toward $150–$178/MWh from 16:30–17:00 AEST onward as the afternoon peak approaches. Today's heavily overcast conditions (98% average cloud cover forecast, near-zero solar potential) mean rooftop and utility solar will provide minimal relief during the daytime window, placing greater reliance on dispatchable plant through the day.

Two active AEMO market notices are relevant to NSW today. Notice 144154 reclassified the Bayswater–Mt Piper 500kV No.5A3 line and Wollar–Mt Piper 500kV No.5A5 line as a credible contingency event due to