Portland Premium diesel price forecast
As of Tue 10 Nov, Portland premium diesel averages 277.8 c/L, and FuelRadar expects little change by Tue 17 Nov (estimate 277.8 c/L). No weekday has been reliably cheaper over the last 11 full weeks; the cheapest station, OTR Portland, is 275.7 c/L, 2.1 c/L under the average.
Premium dieselOutlook updated
Likely steady
Estimate only (yesterday's outlook): prices may edge down about 2.7 c/L by Thu 12 Nov, then return to about today's level by Tue 17 Nov. Over the last 55 days, 7-day estimates missed by 4.4 c/L on average; "no change" missed by 4.4 c/L.Cheapest of 2 stations: 275.7 c/L at OTR Portland · Updated
Lowest estimate: Thu 12 Nov, about 275.1 c/L (2.7 below today).
Alert me below 273.0Cheapest Premium diesel in Portland now
Updated
Premium diesel: last 30 days and the next 7
Premium diesel: last 30 days and the next 7. Reported history begins at 280.7 c/L on 11 Oct 2026. The forecast moves from 277.8 c/L on 10 Nov 2026 to 277.8 c/L on 17 Nov 2026.
Source: FuelRadar (fuelradar.com.au)
Reported city averages to Mon 9 Nov, then the FuelRadar Portland estimate dated Mon 9 Nov with its likely range shaded.
Day by day
Each day’s likely range and estimate, with the change from today’s 277.8 c/L (dashed line).
- likely 275.1 to 282.6 c/L276.4
- likely 273.1 to 285.1 c/L275.1
- Same as today (estimate)275.8
- Same as today (estimate)276.4
- Same as today (estimate)277.1
- Same as today (estimate)277.8
- Same as today (estimate)277.8
Portland prices are typical right now
The city average of 277.8 c/L sits inside the usual range of 251.2 to 281.0 c/L for the last 90 days. That is higher than on 42% of the last 90 days.
Portland Premium diesel forecast explained
What usually happens next
Premium diesel prices do not follow a regular cycle, so the estimate follows the recent trend in Portland's daily averages. That leaves it about level by .
What could change it
Wholesale and crude signals: the national wholesale diesel price fell 9.7 c/L to 257.0 c/L over the five days to , and Brent crude fell 5.1% to US$98.32 a barrel. The estimate does not use them directly.
Capital cities
Each capital's latest city daily average and its call; each row opens that city's forecast. City daily averages, not station prices.
| Capital | Average (c/L) | Price cycle | Call |
|---|---|---|---|
| Sydney | 275.7 | No regular cycle | 275.7 by Tue 17 Nov |
| Melbourne | 276.5 | No regular cycle | 273.5 by Tue 17 Nov |
| Brisbane | 278.0 | No regular cycle | 275.8 by Tue 17 Nov |
| Perth | 274.1 | No regular cycle | 270.3 by Tue 17 Nov |
| Adelaide | 267.7 (lowest) | No regular cycle | 265.0 by Tue 17 Nov |
| Canberra | 285.0 | No regular cycle | 286.6 by Tue 17 Nov |
| Darwin | 287.9 | No regular cycle | About the same |
| Hobart | 283.8 | No regular cycle | 281.1 by Tue 17 Nov |
When is Premium diesel cheapest in Portland?
No weekday was the cheapest in most of the last 11 full weeks to : the Premium diesel weekday averages in Portland were within 0.8 c/L of each other once the overall price movement is removed.
| 90-day low | 244.7 c/LSun 16 Aug |
|---|---|
| Today against the 90-day low | +33.1 c/LCity average 277.8 c/L on Mon 9 Nov |
From 90 days of Portland Premium diesel city daily averages to Mon 9 Nov.
See the Portland Premium diesel forecast in the app
The 7-day forecast, a fill-now-or-wait call each day and price alerts. Free on iPhone and Android.
App preview. Prices shown are example captures, not current reports.
How accurate is the forecast?
- Forecast miss, 7 days ahead
- 4.17 c/L
- "Prices stay the same"
- 4.12 c/L
Source: FuelRadar (fuelradar.com.au)
The week-ahead forecast has not yet beaten "prices stay the same", so every estimate is labelled "Estimate only" with its average miss.
From 412 checks of the seven-day estimate against the reported city daily average, beside assuming prices stay the same over the same days.
| Ahead | Miss | No change | Result |
|---|---|---|---|
| Next day | 0.74 | 0.74 | About the same as no change |
| 3 days ahead | 1.82 | 1.94 | Closer than no change |
| 7 days ahead | 4.17 | 4.12 | About the same as no change |
| 14 days ahead | 7.94 | 7.85 | About the same as no change |
| Average miss in c/L over each horizon's replay checks. The 7-day row decides whether the call names a direction. | |||
How we forecast
FuelRadar has helped Australian drivers find cheaper fuel since 2020. Each estimate starts from Portland's reported daily city averages and how they have moved recently. A city daily average is FuelRadar's scheduled morning average of the city's reported station prices, the figure this page quotes for every capital. Where a city has a regular price cycle, the estimate projects that cycle; elsewhere it follows the recent trend, blended with the latest dated wholesale price change. The likely range widens with each day ahead.
Next-day estimates missed by 0.8 c/L on average, no better than assuming prices stay the same (0.8 c/L).
56 days checked · 15 Sept to 9 Nov
Forecast test resultsForecast questions
When will Premium diesel prices go down in Portland?
Estimate only (yesterday's outlook): Premium diesel in Portland is estimated to edge down about 2.7 c/L by Thu 12 Nov, then return to about today's level, 277.8 c/L by Tue 17 Nov (likely 272.8–299.0), from 277.8 c/L estimated for Tue 10 Nov. Over the last 55 days, 7-day estimates missed by 4.4 c/L on average; "no change" missed by 4.4 c/L. The dated 30-day forecast shows a likely range, not a promised low date. Check current station prices before changing when you fill.
What is the best day to buy Premium diesel in Portland?
No weekday was consistently cheaper in Portland over the last 11 full weeks to Sun 8 Nov once the overall price movement is removed: the weekday averages were within 0.8 c/L of each other.
How accurate is FuelRadar Australia's Premium diesel price outlook?
Not accurate enough yet to tell you to fill or wait, so we don't. Each estimate shows its likely range. From 15 Sept to 9 Nov our next-day Premium diesel forecasts for Portland were off by 0.8 c/L on average over 56 days checked. Assuming prices wouldn't move was just as close.
What were the lowest and highest Premium diesel prices in Portland in the last 90 days?
Since Wed 12 Aug, the Portland Premium diesel city daily average ranged from 244.7 c/L on Sun 16 Aug to 284.0 c/L on Mon 12 Oct. It was 277.8 c/L on Mon 9 Nov.
Will premium diesel prices go up tomorrow in Portland?
Estimate only: FuelRadar's Portland estimate for Wed 11 Nov is 276.4 c/L, down 1.4 c/L on the 277.8 c/L estimated for Tue 10 Nov. Next-day estimates for Portland missed by 0.8 c/L on average over 56 days checked, about the same as assuming prices stay the same. Check current station prices before you wait to fill.
How often is the outlook updated?
We update the forecast overnight. For anything that changed today, check the map. While the update runs, we may show the previous forecast with its date.
Fuel price reports
What drivers paid in every state and territory in October 2026, town by town.
- Australia U91
- 242.8c/L +17.3 on the period before
- Read the Australian reportEvery town we could rank, the capital against the rest and the cost of a litre
- Australian fuel price reportPDF · October 2026Download
- Every fuel price report