Updated April 5, 2026 — Prices updated regularly from EIA data
$3.77
Average Regular Unleaded — Seattle, Washington
Current Gas Prices in Seattle
Drivers in Seattle, Washington are paying an average of $$3.77 per gallon for regular gasoline as of {month} {year}. Local prices range from $$3.62 at discount stations to $$3.97 at premium locations.
Fuel Type
Price / Gallon
Grade
Trend
Regular Unleaded
$3.77
87 octane
▲ Rising
Mid-Grade
$4.36
89 octane
▲ Rising
Premium
$4.71
91-93 octane
▲ Rising
Diesel
$5.10
N/A
▲ Rising
Price Comparison
Seattle Average
$3.77
Regular Unleaded
Washington State Average
$3.93
$0.16 below the Washington average
National Average
$3.99
$0.22 below the national average
About Gas Prices in Seattle
Understanding what drives Seattle gas prices helps you save every week. The metro area hosts dozens of competing fuel stations — high-volume retailers and warehouse clubs consistently offer the lowest prices, while stations near freeway entrances charge a convenience premium of 5-15 cents per gallon.
Gas Prices by Brand in This City
Estimated prices based on brand modifiers. Sorted cheapest to most expensive.
Seattle's current average of $$3.77 compares to the Washington statewide average of $$3.93. Seattle is $0.16 below the Washington average the state average, which is typical for a metro of its size and location.
Gas stations in Seattle typically update prices 1-3 times per week in response to wholesale market changes. Prices generally dip early in the week and rise Thursday-Sunday. Following weekly trends helps identify optimal fill-up windows.
Costco and Sam's Club fuel stations serve many major metropolitan areas and offer the lowest prices for members — typically 15-25 cents below local market. Membership costs $65-130/year but typically pays for itself in fuel savings alone for regular drivers.
Gas price spikes in Seattle are typically triggered by regional supply disruptions, pipeline outages, refinery maintenance, seasonal blend transitions, and global crude oil price increases. Holiday demand surges around Memorial Day, July 4th, and Labor Day also push prices up temporarily.
Premium gas in Seattle is worth the extra cost only if your vehicle requires it. If your owner's manual says Required, always use premium. If it says Recommended, you may use regular with minimal performance loss. Never use regular in a vehicle that requires premium.