Don't get pumped.
As of 9 September 2026, the cheapest Unleaded Petrol in Western Australia is 188.5c per litre at Vibe, Kwinana Town Centre — versus the Western Australia average of 221.0c (7.8c above the national average of 213.2c). Across 1,170 stations, Unleaded Petrol ranges from 188.5c to 374.0c, so filling a 50-litre tank at the cheapest station saves about $16.25 over the state average. Over the past week the WA average has fallen 3.4c.
Compare Unleaded Petrol across 1,170 stations in Western Australia. Updated 11:02 PM, 09 Sep 2026.
Over the past 89 days, Unleaded Petrol in Western Australia has averaged 261.0c per litre, peaking at 272.8c on 12 August and bottoming out at 205.7c on 31 July — a range of 67.1c. Over the past week the WA average has fallen 3.4c. Timing a fill-up around that range matters: on a 50-litre tank, filling at the period low instead of the peak saves $33.55.
| Month | Average Unleaded Petrol |
|---|---|
| May 2026 | 218.3c |
| June 2026 | 260.6c |
| July 2026 | 265.5c |
| August 2026 | 258.6c |
| September 2026 | 256.0c |
The cheapest Unleaded Petrol price in Western Australia right now is 188.5c per litre, across 1,170 stations tracked. The cheapest suburb right now is Beckenham at a 193.4c average across 3 stations. Filling a 50-litre tank at the cheapest station instead of a station charging the state average of 221.0c saves $16.25. See the live cheapest-stations list on this page for the exact station, address and suburb. Prices update twice daily from the official state government feed, so the cheapest station can change between the morning and afternoon updates — check again before you drive.
The current Western Australia average for Unleaded Petrol is 221.0c per litre — 7.8c above the national average of 213.2c. Prices at individual stations range from 188.5c to 374.0c, a spread of 185.5c that shows how much shopping around can save. Over the past week the WA average has fallen 3.4c. Petrolmate computes this average from every station reporting Unleaded Petrol in Western Australia via the official government price feed, refreshed twice daily.
Burk is currently the cheapest brand for Unleaded Petrol in Western Australia at 198.1c per litre average across 16 stations. The gap between the cheapest brand (Burk, 198.1c) and the priciest in our list (Reddy Express, 212.1c) is 14.0c per litre — about $7.00 per 50-litre tank. Brand averages are recalculated twice daily from official price data, so the cheapest brand can change with the price cycle.
Over the past 89 days, Unleaded Petrol in Western Australia has averaged 261.0c per litre, peaking at 272.8c on 12 August and bottoming out at 205.7c on 31 July — a range of 67.1c. Over the past week the WA average has fallen 3.4c. Monthly averages for the past half-year are published in the table on this page. All figures come from official Western Australia government price reporting, aggregated daily by Petrolmate.