Commodity Demand — NSW1: Thursday 20 August 2026
NSW spot price sits at $77.29/MWh as of 06:30 AEST, with demand at 8,203 MW and climbing sharply into the morning ramp. The overnight trough saw demand fall to a low of 6,626 MW around 12:55 AEST (early hours), with prices compressing into the $13-30/MWh range as low load met sufficient baseload and wind generation. From that trough, demand has risen over 1,500 MW in roughly five hours, dragging prices up in step — a clear demonstration of NSW's steep supply curve once black coal generation (currently 5,632 MW, the dominant source) is fully committed and peaking plant is required to fill the gap.
The overnight data shows price sensitivity is non-linear: between 6,700 MW and 7,900 MW demand, prices mostly held under $70/MWh, but once demand pushed past 8,000 MW near 06:00-07:00 AEST, prices jumped to the $80-97/MWh band, with a spike to $97.55/MWh at 10:35 AEST when demand was near 9,220 MW. This confirms NSW's effective marginal cost step-change sits somewhere around the 8,500-9,000 MW mark, consistent with typical winter morning peak dynamics.
Forecast data points to a firming morning peak, with prices expected to climb through the 09:00-13:00 AEST window, peaking near $95/MWh around 09:30-10:30 AEST target intervals before easing into the afternoon. The 12:30 AEST forecast interval shows $91.84/MWh, reflecting sustained high demand through the late morning. Overnight forecasts show prices falling to single digits by 04:30-05:00 AEST tomorrow (as low as $0.98/MWh), consistent with the load-shifting windows identified for tonight — cheap, low-carbon overnight capacity exists for flexible loads, with savings up to $90/MWh versus today's peak.
Weather conditions support today's demand profile: 12.8°C current temperature with heating demand at 5.2 (moderate) and full cloud cover suppressing solar output (currently only 65 MW from solar versus 919 MW wind). No specific NSW demand-side notices are active today, though the Kemps Creek-Sydney North 330kV line outage (returned to service 19 August) had constrained transfer capability into Sydney load centres over recent days, a factor now resolved. Renewable penetration in NSW sits at 24.27% with carbon intensity at 0.665 tCO2/MWh, reflecting coal's dominant role in meeting this morning's demand ramp.