Adelaide U91 price forecast
As of Sat 14 Nov, Adelaide U91 averages 208.5 c/L, and FuelRadar estimates it will fall about 7.3 c/L to 201.2 c/L by Sat 21 Nov.
U91Outlook updated
Likely to fall
Estimate only: prices may edge down about 7.3 c/L by Sat 21 Nov.
How sure: a week ahead, the estimate has been off by 4.5 c/L on average over 50,257 checks; assuming prices stay the same was off by 4.7 c/L.
Adelaide prices are typical right now
The city average of 208.5 c/L sits inside the usual range of 204.7 to 233.0 c/L for the last 91 days. That is higher than on 33% of the last 91 days.
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Cheapest U91 in Adelaide now
Updated
Other capitals
Each capital's latest city daily average and its call; each row opens that city's forecast. City daily averages, not station prices. Averages dated Sat 14 Nov.
See the Adelaide U91 forecast in the app
The 7-day Adelaide forecast, updated each day, and price alerts. Free on iPhone and Android.
App preview. Prices shown are example captures, not current reports.
More about the Adelaide forecast
Adelaide U91 forecast explained
What usually happens next
Adelaide has no regular price cycle, so the estimate follows the recent trend in its daily averages, blended with the latest five-day change in wholesale prices. That puts it down about 7.3 c/L by .
What could change it
Wholesale and crude signals: wholesale petrol in Adelaide fell 16.0 c/L over the five days to , and Brent crude rose 3.7% to US$96.00 a barrel. The estimate already blends in that wholesale change.
U91 forecast chart and daily figures
U91: last 30 days and the next 7
U91: last 30 days and the next 7. Reported history begins at 236.1 c/L on 16 Oct 2026. The forecast moves from 208.5 c/L on 14 Nov 2026 to 201.2 c/L on 21 Nov 2026.
Source: FuelRadar (fuelradar.com.au)
Reported city averages to Sat 14 Nov, then the FuelRadar Adelaide estimate dated Sat 14 Nov with its likely range shaded.
First lower estimate: Sun 15 Nov, about 206.2 c/L (2.3 below today).
Day by day
Each day’s likely range and estimate, with the change from today’s 208.5 c/L (dashed line).
- likely 205.1 to 207.7 c/L206.2
- likely 201.8 to 208.5 c/L204.3
- likely 198.6 to 209.2 c/L202.4
- likely 196.7 to 211.6 c/L202.1
- likely 194.8 to 214.0 c/L201.8
- likely 192.9 to 216.4 c/L201.5
- likely 191.0 to 218.9 c/L201.2
When is fuel cheapest in Adelaide?
Adelaide's price cycle is paused, with no regular price jumps lately (the last jump started Fri 18 Sept): its U91 prices are following wholesale costs and the recent trend, so they tend to move a week or two after the terminal gate price.
On Fri 13 Nov the national terminal gate (wholesale) price was 195.8 c/L and the Adelaide city average 211.5 c/L, 15.7 c/L above it.
No weekday was the cheapest in most of the last 11 full weeks to : the U91 weekday averages in Adelaide were within 0.4 c/L of each other once the overall price movement is removed.
| Cheapest weekday | No set dayNo day led most of 11 full weeks |
|---|
Terminal gate prices published by the Australian Institute of Petroleum.
What usually follows a Adelaide price peak
What usually happens after a peak
Past 7 cyclesSource: FuelRadar (fuelradar.com.au)
20 days after their peak, the last 7 Adelaide cycles since Nov 2025 sat a median 29.7 c/L below the peak, the middle half from 44.9 below to 26.3 below.
Past Adelaide cycles lined up on their peak day, from the city daily averages. A record of past cycles, not a forecast.
Adelaide this week and a year ago
Adelaide U91 averaged 215.1 c/L over the seven days to 13 November 2026, 41.7 c/L above the same week a year earlier (173.4 c/L).
| Week | Average (c/L) |
|---|---|
| Latest seven days7 Nov to 13 November 2026 | 215.1 |
| Same week a year earlier8 Nov to 14 November 2025 | 173.4 |
| Change | 41.7 higher |
The same weekdays 52 weeks apart, from the city daily averages.
How Adelaide compares
It is 8.1 c/L below the South Australia average and 15.1 c/L below the Australia average of current station reports. Adelaide's city daily average was 232.9 c/L in October, 14.2 c/L higher than in September. Adelaide's price cycle is paused, with no regular price jumps lately (the last jump started Fri 18 Sept).
| Area | U91 average (c/L) |
|---|---|
| AdelaideCity daily average, Sat 14 Nov | 208.5 |
| South Australia580 current station reports | 216.6 |
| Australia6,901 current station reports | 223.6 |
How accurate is the forecast?
- Forecast miss, 7 days ahead
- 4.55 c/L
- "Prices stay the same"
- 4.70 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 50,257 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 | 0.87 | 0.97 | Closer than no change |
| 3 days ahead | 2.08 | 2.37 | Closer than no change |
| 7 days ahead | 4.55 | 4.70 | About the same as no change |
| 14 days ahead | 7.89 | 8.00 | 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. | |||
Adelaide forecast graphics for news
How we forecast
FuelRadar has helped Australian drivers find cheaper fuel since 2020. Each estimate starts from Adelaide'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 0.7 c/L on average, closer than assuming prices stay the same (0.8 c/L).
56 days checked · 20 Sept to 14 Nov
Forecast test resultsFuel price reports
What drivers paid in every state and territory in October 2026, town by town.
- Australia U91
- 242.8c/L 17.3 c/L higher than 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
Forecast questions
When will U91 prices go down in Adelaide?
Estimate only: U91 in Adelaide is estimated to edge down about 7.3 c/L, to 201.2 c/L by Sat 21 Nov (likely 191.0–218.9), from 208.5 c/L reported Sat 14 Nov. Over the last 55 days, 7-day estimates missed by 5.4 c/L on average; "no change" missed by 5.6 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 U91 in Adelaide?
No weekday was consistently cheaper in Adelaide over the last 11 full weeks to Fri 13 Nov once the overall price movement is removed: the weekday averages were within 0.4 c/L of each other.
How accurate is FuelRadar Australia's U91 price outlook?
Not accurate enough yet to tell you to fill or wait, so we don't. Each estimate shows its likely range. From 20 Sept to 14 Nov our next-day U91 forecasts for Adelaide were off by 0.7 c/L on average over 56 days checked. That beat assuming prices wouldn't move (0.8 c/L).
What were the lowest and highest U91 prices in Adelaide in the last 90 days?
Since Sun 16 Aug, the Adelaide U91 city daily average ranged from 197.5 c/L on Sun 16 Aug to 238.1 c/L on Mon 12 Oct. It was 208.5 c/L on Sat 14 Nov.
Will petrol prices go up tomorrow in Adelaide?
Estimate only: FuelRadar's Adelaide estimate for Sun 15 Nov is 206.2 c/L, down 2.3 c/L on the 208.5 c/L reported for Sat 14 Nov. Next-day estimates for Adelaide missed by 0.7 c/L on average over 56 days checked, closer than assuming prices stay the same. Check current station prices before you buy.
When will diesel prices go down in Adelaide?
Diesel does not usually follow the petrol price cycle, so there is no regular low to wait for. The Adelaide diesel city daily average was 255.4 c/L on Sat 14 Nov, down 26.4 c/L over 30 days. Wholesale diesel in Adelaide fell 10.0 c/L over the five days to Fri 13 Nov. FuelRadar names no date for a fall: the Adelaide diesel forecast gives its day-by-day estimate and likely range.
How often is the outlook updated?
We update the forecast overnight. For anything that changed today, check the map.