Regional Outlook — NSW1: Wednesday 26 August 2026
NSW spot price sits at $299.99/MWh as at 20:30 AEST, sitting at the market price cap-adjacent level after climbing steadily through the evening peak from $134.86/MWh at 18:00. This is a sharp departure from overnight and early-morning levels, which troughed near zero and even briefly went negative (-$2.00/MWh at 05:15 AEST) on soft demand and renewable output. The 24-hour trend shows a classic morning-to-evening price build: sub-$100/MWh overnight, climbing to $130-150/MWh through the day, then surging past $200/MWh from 19:30 as demand pushed above 8,300 MW into the evening peak.
Generation mix is currently dominated by black coal at 6,400 MW, the single largest contributor by a wide margin. Hydro follows at 1,224 MW, providing significant dispatchable support during the price spike. Batteries are contributing 308 MW, gas OCGT 134 MW, wind a modest 51 MW, and solar has tapered to just 18 MW as the sun sets. Renewable penetration is at 17.55% based on the latest carbon signal, well down from the overnight peak of over 45% recorded around 02:00-02:30 AEST when wind and hydro carried a much larger share of load. Carbon intensity has risen in step with the fossil-heavy evening mix, now sitting at 0.725 tCO2/MWh, up from lows of around 0.48 tCO2/MWh overnight.
Predispatch forecasts point to continued volatility through Thursday. Prices are expected to ease sharply after 21:00 AEST, falling to $65/MWh by 22:00 and down to the $13-25/MWh range through the early hours of Friday morning as demand drops off. However, forecasts flag a strong rebound from 07:00 AEST tomorrow, with prices climbing to $138/MWh by 08:00 and spiking to $202.62/MWh around 09:00, followed by further volatility through the day including a forecast peak of $198.21/MWh near midday. This morning peak pattern suggests tight supply-demand balance is expected to persist into tomorrow's operational day.
On notices, NSW had a credible contingency reclassification for the Bayswater-Mt Piper 500 kV lines due to lightning activity, which was declared then cancelled within the same day (03:47 to 05:49 AEST), indicating no lasting network constraint. A non-conformance notice was also issued for unit VP6 (-21 MW) during the 05:45-05:50 AEST window on 26 August. No active market interventions or directions are currently affecting NSW. Traders should note the SA region's forecast Minimum System Load event on 30 August, which could have flow-on effects for interconnector flows and NSW pricing near that date given negative demand is forecast in SA at that time.