Portland, US Clear Sky Chart

Portland, US (45.51°, -122.68°) · Updated 07:35 PDT
8
Poor
medium confidence ⓘ
medium · Forecast stability

Tonight's forecast has shifted a little across recent updates — worth a re-check closer to dusk. We compare how much tonight's score has moved across our recent forecast updates, a score that's held steady is more trustworthy.

Confidence reflects how trustworthy the forecast is, it doesn't change the score.

Probably skip tonight
BEST 19:00–20:00 (1h)
Partly cloudy with some clear gaps but bright moonlight limits faint objects. Some haze, so transparency is slightly reduced. Conditions are changeable, so check again closer to the time.
Sunset
18:04
Sunrise
07:44
Usable Hours
3/12
Moon
93%
Visible Planets
♂ Mars53° SE
♃ Jupiter46° SE
♄ Saturn46° S
⛢ Uranus65° S
♆ Neptune44° S
Sky darkness
City sky (Bortle 8-9)
SQM 17.9, estimated from satellite night lights. A property of the place, separate from tonight’s score. How we estimate this
Open Full Portland, US Forecast →
Hour-by-hour scores · Planet rise/set & visibility · ISS & satellite passes · Moon detail · Full score breakdown · Aurora & observer profiles

Stargazing in Portland, US

Portland shares Seattle's Pacific Northwest cloud cover, but also its rewards when clear. Summer months (July–September) offer the most reliable observing, with dry east-wind patterns bringing excellent transparency. The Oregon high desert (2–3 hours east) is outstanding for dark-sky observing, with the Oregon Star Party drawing enthusiasts from across the region. Mount Hood and the Columbia Gorge provide dramatic observing backdrops. Winter storms are frequent, but breaks between systems can be very clear.

Portland, US Stargazing FAQ

Where is the best dark sky near Portland, Oregon?∨
The Oregon high desert, 2-3 hours east past the Cascades, is outstanding for dark-sky observing. The Indian Trail Spring area near Prineville hosts the annual Oregon Star Party. Mount Hood's flanks are a closer option.
When is the best time to stargaze in Portland?∨
Summer months (July-September) offer the most reliable clear skies, with dry east-wind patterns bringing excellent transparency. Winter is cloudy but breaks between storms can be very clear.
How many clear nights does Portland get?∨
Portland averages about 150 clear nights per year, heavily weighted toward summer. The east side of the Cascades gets significantly more clear nights than the wet west side.

Stargazing guides

Is Tonight Good for Stargazing?

The answer depends on five things you can check right now.

Light Pollution & the Bortle Scale

How dark is your sky: and what difference does it make?

What Planets Are Visible Tonight?

Real visibility data for all 7 naked-eye and telescope planets, calculated for your location.

Meteor Shower Calendar 2026

Every shower this year: peak dates, expected rates, moon interference, and the two you absolutely cannot miss.

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