Yes, weed is legal in Seattle for adults 21 and older, and has been since Washington voters approved Initiative 502 in November 2012. You can walk into a state-licensed retail store, buy up to an ounce of usable cannabis, and use it on private property without breaking state law. The rules on how much you can carry, where you can consume it, and what happens when you drive, fly, or rent are stricter than most people expect.
How Much You Can Legally Possess
Washington caps how much cannabis an adult 21 or older can have at any one time:
- One ounce (about 28 grams) of usable cannabis flower
- 16 ounces of solid edibles
- 72 ounces of liquid cannabis products
- Seven grams of cannabis concentrates
Stay within those numbers and you’re fine under state law. Go over and the penalties climb fast. Possessing more than one ounce but no more than 40 grams is a misdemeanor with a mandatory minimum of 24 hours in jail and fines starting at $250 for a first offense.1Washington State Legislature. Washington Code 69.50.4014 – Possession of Forty Grams or Less of Cannabis Penalty Referral to Assessment and Services Anything above 40 grams becomes a Class C felony carrying up to five years in prison and a $10,000 fine.
You can share, but not sell. The statute allows giving up to half an ounce of usable cannabis, eight ounces of solid edibles, 36 ounces of liquid products, or three and a half grams of concentrates to one or more adults 21 or older in a single 24-hour period, as long as no money changes hands.2Washington State Legislature. RCW 69.50.4013 – Possession Use of Controlled Substance Penalty Selling without a license is always illegal.
Where to Buy It
The only legal source is a state-licensed retail store.3Washington State Liquor and Cannabis Board. Using and Having Cannabis Seattle has dozens of them. Buying from anyone else is a crime regardless of the amount.
Every store checks ID before letting you onto the sales floor. Acceptable forms include a driver’s license or state ID from any U.S. state or Canadian province, a U.S. passport or passport card, a military ID, a permanent resident card, or a tribal enrollment card from a federally recognized Washington tribe with security features comparable to a state license.4Washington State Legislature. WAC 314-55-150 – Forms of Acceptable Identification for Purchasing Cannabis
The shelf price isn’t the checkout price. Washington adds a 37% excise tax to every retail cannabis sale, and standard state and local sales taxes stack on top of that.5Washington State Legislature. RCW 69.50.535 – Cannabis Excise Tax Medical Exemption Expect the final total to run roughly 45 to 50 percent over the sticker. Most retailers still run mostly on cash because federal banking rules make normal financial services hard to get. Some have on-site ATMs or debit workarounds. Bring cash to be safe.
Where You Can Actually Use It
Legal purchase does not mean legal use anywhere. Washington restricts cannabis consumption, including smoking, vaping, and edibles, to private property where the property owner allows it.3Washington State Liquor and Cannabis Board. Using and Having Cannabis
Using cannabis in a public place is a Class 3 civil infraction with a maximum $50 fine.6Washington State Legislature. RCW 7.80.120 – Monetary Penalties Restitution Public place covers parks, sidewalks, restaurant patios, concert venues, hiking trails, and state or federal parkland. Bars and music venues count too, even though they’re private businesses. Seattle has no legally operating Amsterdam-style cannabis cafés.
If you rent, your landlord can prohibit cannabis use through the lease. Hotels and motels set their own policies, so check before lighting up. Employers can ban use on company property regardless of state law.
Federally subsidized housing is stricter still. Because cannabis remains a Schedule I substance under federal law, property owners receiving federal housing funds must include lease provisions permitting termination for cannabis use, and they cannot adopt policies that affirmatively allow it.7U.S. Department of Housing and Urban Development. Use of Marijuana in Multifamily Assisted Properties Enforcement varies, but the eviction authority is there.
Driving and Transporting Cannabis
Washington treats cannabis DUI as seriously as drunk driving. The per se limit is 5 nanograms of active THC per milliliter of blood, measured within two hours of driving.8Washington State Legislature. RCW 46.61.502 – Driving Under the Influence Test at or above that level and you can be convicted with no other evidence of impaired driving. There’s no reliable way to self-check your THC blood concentration, which makes this harder to navigate than the 0.08 BAC line most drivers know.
A first-offense cannabis DUI with no priors in seven years carries a mandatory minimum of 24 consecutive hours in jail, up to 364 days maximum, a fine between $350 and $5,000, and at least a 90-day license suspension. Refusing the blood test triggers a two-year license revocation on a first offense.9Washington State Legislature. RCW 46.61.5055 – Alcohol and Drug Violators Penalty Schedule
Consumption inside a vehicle is off-limits whether you’re driving, riding, or parked. When you’re transporting cannabis, keep it in the original sealed container from the store and put it in the trunk. If your vehicle has no trunk, it needs to be somewhere the driver and passengers can’t reach. The glove compartment does not qualify.
Travel and Sea-Tac
Cannabis you bought in Washington cannot leave the state. Carrying it across state lines is a federal offense even if the neighboring state has also legalized. Mailing or shipping cannabis is illegal too, including within Washington.10Washington State Liquor and Cannabis Board. Federal Implications
Sea-Tac is the practical pressure point. Cannabis is illegal under federal law, and TSA operates under federal authority.11Transportation Security Administration. Medical Marijuana TSA officers don’t specifically hunt for cannabis, but if they see it during screening, they’re required to refer the matter to law enforcement. Use what you bought before you head to the airport and leave nothing in your bags.
Home Growing
Recreational home cultivation is not allowed in Washington. Growing even a single plant without authorization is illegal, and only licensed commercial producers or authorized medical patients may cultivate.12Washington State Liquor and Cannabis Board. Growing Cannabis at Home That’s stricter than Oregon or Colorado, which allow limited personal grows.
Jobs and Drug Testing
A Washington law effective January 1, 2024, bars employers from rejecting job applicants based on off-duty cannabis use or on pre-employment drug tests that detect non-psychoactive cannabis metabolites.13Washington State Legislature. ESSB 5123 Final Bill Report Those metabolites are the residual traces that stay in your system long after any impairment ends, and they’re what most standard urine tests measure. Employers can still use testing methods that identify active impairment.
Exceptions are significant. The law does not apply to law enforcement, firefighting, first responders including 911 dispatchers, corrections officers, airline or aerospace jobs, roles requiring a federal security clearance, or other safety-sensitive positions where impairment poses a substantial risk of death. It only covers initial hiring. Post-hire testing for on-the-job impairment, post-accident testing, and reasonable-suspicion testing remain fully legal.
The Federal Layer
Cannabis is still a Schedule I controlled substance under federal law, in the same category as heroin and LSD.14Office of the Law Revision Counsel. 21 USC 812 – Schedules of Controlled Substances For everyday life in Seattle, this mostly doesn’t touch you. State and local police follow Washington law. The federal classification bites in specific situations: subsidized housing, air travel, employment with federal contractors, banking for cannabis businesses, and anything on federal property or crossing state or national borders.10Washington State Liquor and Cannabis Board. Federal Implications