Regional Outlook — NSW1: Tuesday 4 August 2026
NSW spot price sits at $130.01/MWh as at 20:30 AEST, tracking well above the past 24 hours' overnight lows near $0-50/MWh but consistent with this evening's demand ramp to 9,734 MW. Prices have climbed steadily since the early-hours trough — several intervals overnight dipped negative (as low as -$8.12/MWh around 04:50-05:20) as demand fell below 6,300 MW — before rising through the morning peak, holding in the $110-146/MWh band through midday and afternoon trade, and pushing back above $130/MWh into this evening's system peak.
Generation mix is currently led by black coal at 5,942 MW, with hydro contributing 1,362 MW and batteries at 1,114 MW supporting the evening ramp. Wind is generating 733 MW, gas OCGT is a marginal 41 MW, and solar has tapered to 13 MW post-sunset. Renewable penetration sits at 35% and carbon intensity is 0.5709 tCO2/MWh, down from a midday peak near 0.71 tCO2/MWh — daytime solar output was limited by clear skies but low winter sun angle, while the intensity curve has improved into the evening as wind and hydro pick up load alongside batteries.
Predispatch forecasts point to continued volatility into tomorrow's peak: prices are forecast to spike to $197.02/MWh around 21:30 tonight, ease to the $65-80/MWh range overnight, then climb sharply through tomorrow morning — reaching $169.25/MWh by 09:00 and spiking to $299.99/MWh (price cap territory) between 10:30 and 11:00 AEST on 5 August. This aligns with tomorrow's weak wind outlook (3.6% average wind potential) and solar potential of just 24.8%, suggesting thin renewable supply margins during the morning peak. Afternoon forecasts ease back to $97-120/MWh range by mid-afternoon.
An active AEMO constraint (CA_SYDS_59839EB2, invoked 03/08 at 08:15hrs) remains in place on the NSW1-QLD1 interconnector to manage power system security — traders should note potential limits on interconnector flow supporting NSW during tomorrow's forecast price spike. No non-conformance or intervention notices are currently active for NSW1 specifically. Tomorrow's cold, clear conditions (7-15.7°C, minimal cloud) will support heating demand but limit solar contribution during the critical morning ramp, reinforcing the forecast price spike risk around 10:30-11:00 AEST.