Commodity Demand — TAS1: Monday 31 August 2026
Tasmania spot price sits at $11.88/MWh at 06:30 AEST, with demand at 1144 MW and climbing — up from a 895 MW overnight trough around 02:00-04:00 AEST. The region is running on 100% renewable generation, with hydro contributing 564 MW and wind 285 MW, and carbon intensity at 0 tCO2/MWh. This morning's demand ramp is textbook: prices tracked below $15/MWh through the 00:00-05:00 AEST low-demand window, then spiked as demand climbed through the 900s into the 1100s MW band, with yesterday's equivalent period (06:00-08:00 AEST) showing prices punching through $80-112/MWh as demand crossed 1100-1170 MW. That same morning ramp is playing out again today, and the 20:02 AEST forecast run has the 07:00-07:30 AEST price sitting near $7-15/MWh — materially softer than yesterday's equivalent peak, suggesting stronger hydro/wind availability is dampening the ramp this time.
The demand-price relationship in Tasmania is sharply non-linear once total demand pushes past ~1100 MW. Yesterday's data shows prices holding under $30/MWh whenever demand sat below 1000 MW, but the moment demand crossed into the 1100-1200 MW band, prices jumped into the $80-112/MWh range and stayed there through the middle of the day before easing back down as demand fell into the afternoon. Today's demand trajectory should follow a similar shape: a morning peak as commercial and industrial load picks up, a softer midday, and an evening peak. Given current 06:30 AEST demand of 1144 MW is already near yesterday's morning peak levels, traders should expect prices to test $50-100/MWh through the 07:00-11:00 AEST window if hydro dispatch doesn't scale to match.
Forecast pricing for the rest of today shows a distinct pattern: negative to near-zero prices from 21:00-04:00 AEST tonight (as low as -$15/MWh around 10:00 AEST tomorrow), a modest firming to $30-40/MWh through the middle of the day, and a step-up to $50-61/MWh around 15:00-16:00 AEST this afternoon as the evening ramp begins. This matches Tasmania's typical shape — abundant hydro and wind keep the region oversupplied overnight and around midday, with price tension concentrated in the morning and evening ramps. No minimum system load or intervention notices are active for TAS1 today (the SA region has been the focus of recent MSL and voltage intervention notices), and gas OCGT generation remains at 0 MW, meaning today's price outcomes are entirely a function of hydro dispatch decisions and wind output against the demand curve.
Weather is a secondary driver worth flagging: today's outlook shows minimal solar potential (0.3) and moderate wind potential (11.4) with 93% cloud cover, plus a top temperature of just 18.5°C after a cold 5.6°C start. Heating demand is elevated at 12.4 (vs zero cooling demand), reinforcing the morning demand ramp already visible in the data. With wind potential dropping to 7.6 tomorrow and below 1.0 by 5 September, hydro will need to carry a growing share of load through the week, which is worth monitoring for any tightening in the evening price block beyond today's forecast $30-60/MWh range.