Can my neighbors smell my weed?
If their door, window or yard is downwind of you and within about 25 to 50 feet during the day, or about 100 feet on a clear, still night, they can probably catch whiffs now and then. If they're upwind or well off to the side, they usually won't.
Outdoors, the answer mostly comes down to two things: which way the wind is blowing, and the time of day. Smoke doesn't spread out in a circle. It leaves you as a narrow ribbon that swings around with the breeze, so a neighbor 40 feet downwind can smell it while one 15 feet upwind smells nothing.
Check the wind first
Wind is named for where it comes from. A west wind carries smoke east. If your neighbor's open window is on the side the wind is blowing toward, that's where the smell goes. Moving to the other side of the house or the yard often makes a bigger difference than moving farther away.
The wind also wobbles, more so when it's light. In a gentle breeze the smoke can swing 20 degrees or more either way, so give the downwind side some extra room.
Does weed smell travel farther at night?
On a clear evening the air near the ground goes still and stops mixing upward. Smoke then hangs low and slides along with the breeze, carrying the smell two to three times as far as on a sunny afternoon. Late evening on a calm, clear night is when neighbors are most likely to notice. See how far weed smoke smell travels for the numbers by weather.
Through walls, vents and balconies
- Balconies sit right next to other people's windows, and warm smoke rises toward the units above, so even a short drift reaches someone.
- Indoors, smoke can move between units through shared walls, vents, outlets and the gaps around doors and pipes. That kind of drift is well documented for tobacco smoke in apartment buildings, and Driftline's outdoor map doesn't model it.
- Courtyards and alleys channel the wind along their length, so smoke can travel farther in a straight line than it would in the open.
- Many leases ban smoking anywhere on the property, so check yours.
Ways to be a considerate neighbor
- Stand where the wind blows away from windows, doors, patios and play areas.
- Give people more room on calm, clear evenings, when smell carries farthest.
- Fewer people smoking in one spot means a smaller smell zone.
- Check the live map before you light up. Driftline reads the wind, clouds and nearby buildings where you are and draws where the smell is likely to reach.
Common questions
Can neighbors smell weed through walls?
Often, yes. Smoke moves between apartments through gaps around outlets, pipes and doors and through shared vents. This is well documented for tobacco smoke in apartment buildings, and cannabis smoke travels the same way.
Can my upstairs neighbor smell it from my balcony?
Often, yes. Warm smoke rises, and a balcony sits right below other people's windows, so even a short drift reaches them.
How far away do neighbors need to be not to smell it?
Upwind or off to the side, about 10 feet is usually enough. Downwind, it takes about 50 feet during the day and over 100 feet on a calm, clear night.
When are neighbors most likely to notice?
On calm, clear evenings and nights. The air near the ground goes still, and the smell carries two to three times as far as on a sunny afternoon.
How sure is this?
These are estimates from a standard drift model tuned to what's known about tobacco smoke outdoors. Nobody has published a controlled study of how far people can smell cannabis outside, and noses vary a lot. Treat the numbers as a good guide, not a promise that nobody will notice.
Open the live mapFor adults 18+. Cannabis laws vary, and many places ban smoking in public or in rentals even where it's legal, so follow your local rules and your lease.