Regional Outlook — NSW1: Monday 17 August 2026
NSW spot price sits at $70.31/MWh at 06:25 AEST, tracking mid-range within a 24-hour band that spanned $8.21/MWh overnight to a $90.48/MWh peak during this morning's 07:30-08:00 AEST demand ramp. Demand has climbed to 8,958 MW as the morning peak builds, up from an overnight low near 7,600 MW. The past 24 hours show a classic pattern: prices compressed to sub-$30/MWh territory between 22:00-05:00 AEST as demand eased, then spiked through the $80-90/MWh range as the morning peak hit between 06:30-10:00 AEST.
Generation mix at the current interval totals approximately 7,623 MW: black coal dominates at 5,626 MW (73.8%), wind contributes 1,131 MW (14.8%), hydro 417 MW (5.5%), battery output 309 MW (4.1%), solar 96 MW (1.3%, reflecting the pre-dawn interval and heavy cloud cover), and gas OCGT a marginal 44 MW. Renewable penetration reads 25.62%, with carbon intensity at 0.6532 tCO2/MWh — both have drifted from overnight levels where renewables peaked near 49% and intensity fell to 0.45 tCO2/MWh during the low-demand window. This morning's rising demand and fading wind contribution are pushing the mix back toward thermal generation.
Predispatch forecasts point to continued volatility through the day: prices firm into the $70-84/MWh band through the 07:00-11:00 AEST window as morning demand peaks, easing to $43-65/MWh through midday and early afternoon as rooftop solar contributes, then climbing back to $62-65/MWh into the evening peak by 18:00 AEST. Overnight tonight into Wednesday's early hours, forecasts show a sharp collapse — several intervals between 04:00-05:00 AEST print negative prices (-$3.96 to -$6.91/MWh), consistent with low overnight demand and surplus generation. Today's weather offers minimal renewable support: solar potential is near zero under 100% cloud cover with a top of 17.2°C, and wind potential sits at just 0.9%, reinforcing coal's dominant share through the day.
No NSW-specific network constraints are currently active. Recent notices include the completed Bayswater-Sydney West 330kV line restoration and Liddell-Tomago line return to service, both resolving prior transfer limitations. A watch item: AEMO's MTPASA update flags potential low reserve conditions in South Australia for mid-2027/2028 — not a near-term NSW risk, but relevant for cross-regional interconnector flow planning given NSW's tight coupling with VIC1 and QLD1 via existing constraint sets (N-Q-MNSP1, VIC1-NSW1) still referenced in current outage documentation.