Regional Outlook — NSW1: Monday 15 June 2026

The NSW1 spot price sits at $70.60/MWh with total demand at 8,437 MW as of 06:30 AEST. Over the preceding 24 hours, prices tracked a clear winter morning peak pattern — climbing from the low $40s/MWh overnight into the $80–$98/MWh range during the 07:00–09:00 AEST morning ramp, before easing back through the mid-$50s to $60s/MWh across the midday and afternoon periods. The current $70.60/MWh sits at the firmer end of the post-peak range, consistent with demand rebuilding into the evening as temperature sits at 10.2°C with 100% cloud cover driving a heating demand index of 7.8. The 24-hour volume-weighted average has tracked in the high $60s to low $70s/MWh, placing the current interval broadly in line with the day's central tendency.

The generation mix is dominated by black coal at 4,972 MW, representing approximately 75% of in-region output. Wind is contributing 886 MW (roughly 13%), hydro 547 MW (8%), solar 159 MW (2%), and gas OCGT 49 MW (1%), with battery dispatch essentially flat at 0.17 MW. Total renewable penetration stands at 24.08% for the current interval. Carbon intensity is 0.6664 tCO2/MWh — elevated relative to the overnight trough of 0.472 tCO2/MWh recorded around 03:30 AEST when wind output was stronger and demand softer. The step-up in intensity through the 12:00–17:00 AEST window, where renewables fell below 22%, is now partially reversing as the dispatch mix stabilises into the evening.

Predispatch forecasts point to modest upward price pressure through the near-term evening, with 07:00 AEST (21:00 UTC) and 08:00 AEST (22:00 UTC) periods forecast at $80/MWh before easing back toward $70.60/MWh by 08:30 AEST. Prices are then expected to fall sharply through the overnight trough — dropping to $28.95–$37.89/MWh between 13:00–14:30 AEST (03:00–04:00 UTC) — before recovering to the $56/MWh range at 15:00–15:30 AEST and pushing back toward $79–$83/MWh through the 16:00–21:00 AEST business-hours window tomorrow. Load-shifting windows rated "excellent" are centred on 13:00–13:30 AEST (03:00–03:30 UTC) at $26.44–$28.95/MWh, representing savings of approximately 56–54% against the current price.

On active market notices, the most operationally relevant to NSW1 is Market Notice 144267, which recorded a non-conformance event for unit WTAHB1 on 13 June (134 MW deviation, constraint NC-N_WTAHB1, duration 5 minutes). That event has closed but remains active in the notice register. A separate NSW1 non-conformance for MULWASF1 (9 June, 15 MW, 25-minute duration) is also still