Don't get pumped.
As of 23 July 2026, the cheapest Diesel in Western Australia is 184.0c per litre at Independent, Westonia — versus the Western Australia average of 222.7c (1.6c above the national average of 221.1c). Across 1,227 stations, Diesel ranges from 184.0c to 390.0c, so filling a 50-litre tank at the cheapest station saves about $19.35 over the state average. Over the past week the WA average has risen 30.7c.
Compare Diesel across 1,227 stations in Western Australia. Updated 06:39 AM, 23 Jul 2026.
Over the past 89 days, Diesel in Western Australia has averaged 271.6c per litre, peaking at 320.1c on 22 July and bottoming out at 220.3c on 13 June — a range of 99.8c. Over the past week the WA average has risen 30.7c. Timing a fill-up around that range matters: on a 50-litre tank, filling at the period low instead of the peak saves $49.90.
| Month | Average Diesel |
|---|---|
| April 2026 | 260.4c |
| May 2026 | 252.2c |
| June 2026 | 278.5c |
| July 2026 | 302.6c |
The cheapest Diesel price in Western Australia right now is 184.0c per litre, across 1,227 stations tracked. The cheapest suburb right now is Granville at a 193.9c average across 2 stations. Filling a 50-litre tank at the cheapest station instead of a station charging the state average of 222.7c saves $19.35. 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 Diesel is 222.7c per litre — 1.6c above the national average of 221.1c. Prices at individual stations range from 184.0c to 390.0c, a spread of 206.0c that shows how much shopping around can save. Over the past week the WA average has risen 30.7c. Petrolmate computes this average from every station reporting Diesel in Western Australia via the official government price feed, refreshed twice daily.
Burk is currently the cheapest brand for Diesel in Western Australia at 200.2c per litre average across 16 stations. The gap between the cheapest brand (Burk, 200.2c) and the priciest in our list (Petro Fuels, 213.1c) is 12.9c per litre — about $6.45 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, Diesel in Western Australia has averaged 271.6c per litre, peaking at 320.1c on 22 July and bottoming out at 220.3c on 13 June — a range of 99.8c. Over the past week the WA average has risen 30.7c. 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.