This week's petrol trough check (Australia)
Check when prices are cheapest in your city this week: cycle stage, outage caveats, report times, then the fuel map and app before leaving.
By FuelRadar2 min read
Where capitals sit now (Unleaded 91)
- SydneyCity average 219.3 c/L · Falling
- MelbourneCity average 221.4 c/L · Falling
- BrisbaneCity average 219.8 c/L · Falling
- PerthCity average 214.3 c/L · Falling
- AdelaideCity average 214.3 c/L · Falling
- CanberraCity average 232.1 c/L · Falling
- DarwinCity average 240.1 c/L · Falling
- HobartCity average 232.8 c/L · Falling
Confirm before you drive: petrol price cycles · fuel map
Check prices this week
Use this check when you are deciding whether to fill now or wait. Petrol price cycles move city by city, so start with your city, then confirm nearby station reports before you leave. Current charts are on the petrol price cycles hub; station prices and report times sit on the fuel map.
How to read trough, climb, peak and fall
- Trough · prices are near the cheaper end after a multi-day fall. Often the better window for a full tank, if nearby stations still show recent reports.
- Climb · retailers lift prices in waves. Early climb can still be acceptable; late climb is usually poor value for a large fill.
- Peak · the expensive stretch. Buy only what you need to reach the next fall unless you have no choice.
- Fall · prices ease toward the next trough. Waiting can pay if you are not near empty.
Cycles are city-specific. For the national walkthrough see fuel price cycles explained. For live charts open /petrol-price-cycles.
When fuel is cheapest in each capital
Open your city for timing context, then confirm with current station reports before leaving:
- When fuel is cheapest in Sydney
- When fuel is cheapest in Melbourne
- When fuel is cheapest in Brisbane
- When fuel is cheapest in Perth
- When fuel is cheapest in Adelaide
- When fuel is cheapest in Canberra
- When fuel is cheapest in Darwin
- When fuel is cheapest in Hobart
Related national timing guide: best day to buy fuel.
Outage and report-time caveats
A cheap board price is not useful if the grade you need is unavailable, and a recent price report is not proof that fuel is in stock. Treat dry and outage flags as station-level reports: check the affected grade, source, confidence and update time on the stations running dry tracker before a long detour. Regional and highway markets often ignore capital cycles, so reported station prices plus report freshness beat calendar rules.
Fill vs wait checklist
| Where the cycle looks | Usual move |
|---|---|
| Trough / early fall | Fill a full tank after comparing nearby reported prices and update times. |
| Early climb | Fill if you are under half a tank; do not wait for a deeper trough that may already have passed. |
| Late climb / peak | Top up only what you need, then watch for the fall. |
| Unsure / regional | Skip the guess · open the map, filter your grade and check report time. |
Map and app
Ready to act? Compare today's cheapest useful station for your grade · price, distance and when it was reported · on the FuelRadar map. Prefer alerts and saved stations on the go? Download FuelRadar.
Sources
Cycle literacy aligns with the ACCC petrol price-cycle guidance for regular unleaded in the five largest cities. Perth drivers can also use FuelWatch today/tomorrow notified prices. Always confirm live reports on the map before you travel. Guide checked for the week of 11 September 2026 (Australia).
Common questions
What is a petrol price trough?
The cheaper end of a retail unleaded cycle after prices have fallen for a period. Timing differs by city and cycle, so check the current chart and nearby station reports rather than a fixed weekday.
Is the cheapest day the same in every city?
No. When prices are cheapest is city-specific. Use your capital best-day guide and the petrol price cycles hub for your city, then compare nearby stations before leaving.
Do outage flags mean a station has no fuel?
Not automatically. Flags are station-level availability reports that can be stale or incomplete. Check the grade, confidence and update time, then verify locally before a long detour.
Where should I go after reading this?
Open /petrol-price-cycles for city charts, a capital best-day guide for timing context, the fuel map for station prices and report times, and the app if you want alerts on the go.
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