# West Coast (PADD 5) diesel price $6.407/gal for the week of Aug 24, 2026. Up 20.4 cents on the week. EIA weekly on-highway survey, priced as of Monday. _Data through Aug 24, 2026 · source last checked Aug 25, 2026 · page revised Aug 25, 2026_ > Now $6.407/gal, 44% above the 5-yr median. The West Coast hits $6.407/gal for the week of Aug 24, up from $6.203 the prior week. The pump sits 44% above the five-year median, holding far above the US average of $5.652/gal. ## The numbers | Period | Current | Prior | Change | | --- | --- | --- | --- | | Week over week | $6.407/gal | $6.203/gal | +3.3% | | vs 4 weeks ago | $6.407/gal | $6.067/gal | +5.6% | | Year over year | $6.407/gal | $4.461/gal | +43.6% | | vs 5-yr median | $6.407/gal | $4.461/gal | +43.6% | ## About West Coast (PADD 5) diesel price No interstate pipeline connects the West Coast, EIA's PADD 5, to the rest of the country's refined-product network, so unlike the East Coast or Midwest it cannot lean on Gulf Coast supply when local production runs short. The district, which spans California, Oregon, Washington, Arizona, Nevada, Alaska and Hawaii, has to supply itself from in-region refineries, concentrated in California and around Puget Sound, and fill any gap with costlier waterborne cargoes. Because California sits inside this total, PADD 5 is consistently the highest of the five districts, by a wide margin. An unplanned refinery outage anywhere on the coast tends to move this number more than a comparable outage would move a pipeline-connected region, since there is no backfill option. This total includes California. For that split, see [California](/region/california) and [West Coast except California](/region/west-coast-except-california). Calling PADD 5 an island is close to literal. Its refineries sit in two clusters, the California Bay Area and Los Angeles basin, and the Puget Sound corridor north of Seattle, and everything between and beyond them is served by pipeline out of those clusters or by ship. Arizona and Nevada have no refining of their own and take product by pipeline from California and from Texas; Alaska and Hawaii are separate supply islands inside the same reported district. [What are PADDs](/guides/what-are-padds) covers how five districts drawn in 1942 ended up grouping places this different together. When the coast runs short, resupply comes by sea, and that is expensive and slow. A cargo from Asia takes weeks; a domestic cargo from the Gulf has to move through the Panama Canal on a Jones Act vessel, of which there are few. The practical result is that a West Coast supply gap does not close the way an East Coast one does, and the price has to stay high long enough to attract the cargo. That is the structural reason PADD 5 sits at the top of the map rather than merely above average. Fuel specifications add the rest. California requires CARB diesel, a tighter formulation than the federal standard that fewer refineries are set up to make, and the state's low-carbon fuel programs and excise taxes stack on top. Because California is the largest piece of this total, those state-level costs are visible in the district figure even though they apply in only one of its states, which is exactly why EIA publishes the two splits below. The [West Coast vs. the US average](/spreads/west-coast) page shows the size of the gap. ## About this data - Source: EIA Weekly Retail On-Highway Diesel Price survey - Series: On-highway retail diesel, No. 2 - Basis: On-highway retail pump, taxed - Geography: West Coast (PADD 5) - Unit: $/gal - Calculation period: Weekly survey, priced as of Monday - Last observation: Aug 24, 2026 - Update frequency: Weekly --- Cite: West Coast (PADD 5) on-highway diesel averaged $6.407/gal for the week of Aug 24, 2026 (EIA). Monday Diesel. https://mondaydiesel.com/region/west-coast Canonical URL: https://mondaydiesel.com/region/west-coast