Regional Outlook — NSW1: Monday 1 June 2026

The NSW spot price sits at $61.33/MWh at 06:30 AEST, with total demand at 8,468 MW — well off this morning's peak of approximately 10,634 MW reached around 18:45 AEST. That morning peak drove prices into the $85–$102/MWh range across the 17:30–18:35 AEST window, with the session high of $102.48/MWh printed at 18:35 AEST. Since then, prices have eased materially as demand retreated into the evening shoulder. The overnight trough reached as low as $0.91/MWh at 14:15 AEST, reflecting low overnight demand and strong wind output suppressing marginal costs.

The current generation mix is dominated by black coal at 5,168 MW, followed by wind at 1,885 MW, hydro at 639 MW, solar at 99 MW, battery discharge at 50 MW, and gas OCGT providing 26 MW of peaking support. Gas CCGT is offline at this interval. Renewables — wind, solar, hydro, and battery combined — are contributing approximately 34% of sent-out generation, consistent with the latest carbon intensity reading of 0.5802 tCO2/MWh and a renewable penetration of 33.98%. This is a marked improvement from the midday trough where renewable penetration fell as low as 21% (intensity peaking at 0.693 tCO2/MWh around 22:30 AEST), driven by reduced wind output during the business-hours demand peak when coal was carrying the bulk of load. Carbon intensity has improved through the late evening as wind has ramped. Today's weather shows 17 km/h winds and only 16% cloud cover at 10.2°C, with today's forecast averaging 11.6 wind potential — favourable conditions for sustained wind output through the day ahead.

Pre-dispatch forecasts for the 07:00 AEST interval (21:00 UTC) are converging tightly in the $60–$68/MWh range, with the most recent runs from 06:01–06:31 AEST pointing to $60.56/MWh. The 07:30 AEST interval is forecast at $72.22/MWh across multiple pre-dispatch runs, suggesting a moderate step-up as overnight demand bottoms and the early-morning ramp begins. Load shift windows rated "excellent" are clustered from 09:00–15:30 AEST (00:00–06:30 UTC), with forecast prices ranging from sub-$1/MWh to the low $40s — large-load operators and battery operators should note the deep trough opportunity in that window.

Two market notices directly affect NSW today. AEMO activated the NRM_VIC1_NSW1 negative settlement residue constraint at 18:20 AEST on 1 June, limiting VIC-to-NSW flows to manage excess residue accumulation on that interconnector direction; AEMO confirmed the constraint ceased operating at 20:00 AEST, so it is no longer binding but traders should monitor for reactivation if VIC prices diverge sharply from NSW. A contingency reclassification in SA (Para-Templers West and Magill-Torrens Island A 275 kV lines) remains active from 10:00 AEST 1 June, with no constraint set