Commodity Demand — TAS1: Monday 18 May 2026

Tasmania's spot price sits at $96.22/MWh at 06:30 AEST as demand tracks at 1,139 MW and climbing. The demand trajectory through the evening is straightforward: load has been rising steadily since a daytime trough near 944 MW around 16:30–17:00 AEST, and is now on an upward path consistent with winter evening heating demand. At 10.2°C with a heating demand index of 7.8, residential heating load is pushing the curve higher. Based on the pattern in the history, demand will likely approach the 1,200–1,270 MW range through the late evening peak — the same band that held between roughly 21:00–08:30 AEST overnight when prices were anchored at $88/MWh during the morning shoulder before rising to the current floor.

The most striking feature of today's price profile is the sharp contrast between the overnight period and the current moment. Between approximately 11:30 AEST and 06:30 AEST, prices ran persistently in the $154–$222/MWh range, well elevated from current levels, despite demand sitting 60–150 MW lower than the daytime peak of 1,317 MW reached around 18:00–19:00 AEST. This decoupling of price from demand volume indicates the overnight elevation was driven by supply-side factors — likely Basslink import constraints or hydro dispatch pricing — rather than a demand shortfall. By contrast, through the morning and afternoon, demand fell progressively from 1,317 MW to 944 MW and prices tracked in a tight band around $88–$96/MWh, with very little price sensitivity to the 370 MW swing in load. That is an unusually flat price-demand relationship and signals abundant hydro availability during those hours.

Forecast pricing for the 21:00–21:30 AEST slots sits in the $96–$112/MWh range across multiple forecast runs issued through the day, with the most recent runs (post-18:00 AEST) converging on $96.22/MWh. This suggests the market does not anticipate material upward pressure from the demand ramp currently underway, consistent with the flat pricing seen across the prior demand peak. Demand forecast values are absent from all forecast records (all zero), so the AEMO PASA demand forecasts are not feeding through to this dataset — traders should treat the demand trajectory as a pattern extrapolation from the current ramp rather than a formal forecast. Load shifting windows flag $70–$88/MWh prices from 12:00–13:30 AEST tonight as the optimal consumption window, suggesting the price profile dips again in the early hours before any morning ramp.

One demand-side note from the market notices: Queensland carries a Forecast LOR1 condition today (06:00–19:30 AEST, minimum reserve available 1,012 MW against a 1,197 MW requirement), which could influence Basslink flows if Victoria tightens in response to mainland stress. There are no TAS1-specific reserve or constraint notices active, but any tightening of the TAS–VIC interconnector would immediately change the supply picture and apply upward pressure to Tasmanian prices in a manner entirely disconnected from local demand levels — as the overnight price history today already demonstrates.