Gas prices in Seattle this week
Down 2¢ from last week, up $1.08 (23%) from a year ago.
Premium $6.17. Diesel $6.50 (West Coast average). Washington average $5.42 (above it by 23¢); U.S. average $4.35 (above it by $1.30).
52 weeks in Seattle
Last 13 weeks
| Week of | Regular | Premium | vs prior week |
|---|---|---|---|
| Oct 5 | $5.66 | $6.17 | -2¢ |
| Sep 28 | $5.68 | $6.21 | -2¢ |
| Sep 21 | $5.69 | $6.19 | +4¢ |
| Sep 14 | $5.65 | $6.19 | +5¢ |
| Sep 7 | $5.60 | $6.09 | +19¢ |
| Aug 31 | $5.41 | $5.90 | +4¢ |
| Aug 24 | $5.37 | $5.87 | +6¢ |
| Aug 17 | $5.31 | $5.78 | +6¢ |
| Aug 10 | $5.26 | $5.74 | -0¢ |
| Aug 3 | $5.26 | $5.78 | +3¢ |
| Jul 27 | $5.23 | $5.78 | +3¢ |
| Jul 20 | $5.20 | $5.70 | +3¢ |
| Jul 13 | $5.17 | $5.67 | +2¢ |
Questions people ask
What is the average gas price in Seattle right now?
$5.66 a gallon for regular the week of October 5, 2026, down 2¢ from last week. Premium is $6.17. Diesel $6.50 (West Coast average). The number is the EIA's weekly retail average, updated every Monday.
Is gas in Seattle higher than a year ago?
Yes, by $1.08 (23%) from a year ago: it was $4.58 this week last year.
Where does this number come from?
The U.S. Energy Information Administration surveys retail stations every Monday and publishes the average for each metro, state and region. PumpWatt shows the figure as published, with premium beside regular, and keeps every week on file.
What does a tank actually cost in Seattle?
It depends on your car and where you fill up. The Fill up calculator starts from this week's Seattle average and pulls your car's MPG from the EPA. Then it counts the cashback app, the card and the detour, so two stations with the same sign price can cost different amounts.
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Weekly retail averages from the U.S. Energy Information Administration, published each Monday. This page is rebuilt automatically when the EIA releases the week's figures.
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