Northern Lights in SeattleVisible Tonight?
Real-time aurora forecast updated every 15 minutes
Kp 2.3 is well below the Kp 8 that Seattle needs, so the aurora stays too far north tonight.
Verify with the live sky camera →No clear chance in the next 10 nights; forecasts update several times a day, so check back.
Tonight, Hour by Hour
The four things that must line up over Seattle, and how each hour of the night looks.
Kp 2.3 now, Kp 8 needed here
12% cloud cover around 10 PM
Dark from 11 PM
City glow raises the bar; moon 2% lit
All times shown in Seattle local time (PDT), not your device time.
10-Night Aurora Outlook
Planning a trip to Seattle? Peak activity, cloud cover, and darkness for the nights ahead.
Kp ~ marks nights beyond NOAA's precise 3-day forecast, estimated from the 27-day outlook. Treat the far nights as a rough guide, not a promise.
Seeing the aurora in Seattle
Seattle can see the aurora, but it takes a strong storm to beat the city glow: realistically Kp 6 or higher, and clear skies, which is the harder part in western Washington. When those line up, the view north over Puget Sound can be remarkable.
Our verdict is not a Kp number. The Kp index is a global, three-hour average, and treating it as a promise is the single biggest reason people drive out and see nothing. Instead we check four things for Seattle specifically: whether forecast activity reaches the level this latitude needs, whether the sky will be clear, whether it will actually be dark, and how much moonlight and local light pollution will wash out. Only when all four line up do we say yes.
When to go: aurora season in Seattle
Aurora season in Seattle runs from September through April. The limit in summer is not the sun's activity but daylight: at nearly 48 degrees north the sky around the June solstice only reaches full darkness for a short window after midnight, if at all, so even a strong storm fades into the twilight. The strongest displays tend to cluster around the equinoxes in September, October, and March, when Earth's magnetic field couples most efficiently with the solar wind.
Be honest with yourself about how uncommon the big nights are. From inside the city you need a serious storm, realistically Kp 6 or higher, to beat the skyglow, and storms that size arrive only a handful of times in a good year. That is exactly what the 10-night outlook above is for: when a major storm is brewing, it usually shows up there a day or two ahead, which is your cue to start watching both the sky and the clouds.
Seattle's real problem is the clouds, not the storm
The hardest thing about aurora watching in western Washington is not geomagnetic activity, it is the sky itself. For much of the season Puget Sound sits under a marine layer or the next Pacific front, and low cloud erases the northern horizon completely. You can forecast a storm days out; the clouds are the coin flip that decides the night, and they are the reason so many Seattle alerts end with people staring at gray.
The workaround is geography. Drive northwest into the Olympic rain shadow around Sequim and Dungeness, which gets a fraction of Seattle's rainfall and is often clear when the city is buried, or cross the Cascades to the drier, darker Columbia basin and the Methow Valley. Either way you are at nearly the same latitude, so the storm still has to be strong, but you have swapped a hopeless overcast for a real chance at a clean northern horizon.
How to read tonight's forecast and where to go
From inside Seattle the naked-eye bar is roughly Kp 6, and light pollution means faint activity will read as a camera-only glow low on the north horizon. Get to a dark, north-facing shoreline and that bar drops. The Kp number is only the entry ticket, though: a clear horizon and real darkness matter just as much, which is why the verdict above folds cloud cover and twilight into one answer instead of making you cross-check three apps.
For a quick look, Golden Gardens or Richmond Beach put open water to your north within the city, and Mukilteo or Whidbey Island get you darker still. When the forecast is big and the coast is clouded, commit to the drive: Dungeness Spit for the rain shadow, or east of the Cascades for the clearest skies. Wherever you land, give it two full hours, let your eyes adjust for 15 minutes away from your phone, and point night mode north now and then, because the camera will catch an approaching display before your eyes do.