Regional Outlook — NSW1: Wednesday 19 August 2026

NSW spot price sits at $83.36/MWh as of 06:25 AEST, tracking the top of an overnight range that swung from -$7.23/MWh during the pre-dawn wind and hydro surplus to a morning peak of $90/MWh at 17:00 AEST yesterday. Demand has climbed to 8,640 MW and is still rising through the morning ramp, consistent with the pattern seen over the past 24 hours where demand troughed near 5,750 MW around 03:00-04:00 AEST and peaked above 10,000 MW mid-morning. The current price represents a firming trend from the low-$60s/MWh region that dominated early evening trade yesterday.

Generation mix at 06:30 AEST shows black coal supplying 5,553 MW, the largest single contributor, alongside wind at 1,197 MW, hydro at 682 MW, battery storage at 451 MW, and a small gas OCGT contribution of 40 MW. Solar output is negligible at 0.56 MW, reflecting the pre-dawn timing of this snapshot — solar potential lifts through the day with a forecast average of 7.3% today under 60% cloud cover. Renewable penetration sits at 29.42%, down from an overnight high of over 52% between 01:00-03:00 AEST when wind and hydro dominated a low-demand system. Carbon intensity has risen accordingly to 0.62 tCO2/MWh, up from an overnight low of 0.414 tCO2/MWh, tracking the inverse relationship between renewable share and emissions intensity typical of the NSW diurnal cycle.

Predispatch forecasts point to further price strength through the morning and into midday, with targets of $84.79/MWh by 08:30 AEST, climbing to a session high near $90.84/MWh around 09:30 AEST before easing. Prices are then forecast to soften through the afternoon, dropping to the mid-$40s/MWh by 14:00-16:00 AEST as demand tapers and solar contribution firms, before a mild evening uptick to around $52.89/MWh by 17:30 AEST. Overnight tonight, forecasts show prices falling sharply again, with several intervals between 02:30-05:00 AEST forecast at or below $0/MWh, consistent with continued strong overnight wind generation.

Active market notices affecting NSW include a resolved unplanned outage on the Sydney West–Vineyard No. 29 330 kV line, which invoked constraint set N-SWVY_29 affecting NSW1-QLD1 and VIC1-NSW1 interconnector flows from 15:30 AEST yesterday — this remains in effect and traders should monitor for interconnector capacity impacts. The Kemps Creek–Sydney North No. 14 330 kV line returned to service at 18:20 AEST yesterday, lifting an associated constraint. No NSW-specific interventions or non-conformance declarations are currently active, though a VIC1 contingency reclassification near Eildon-Mt Beauty was cancelled overnight, removing lightning-related risk to that interconnection corridor.