Cusco, Peru Clear Sky Chart

Cusco, Peru (-13.53°, -71.97°) · Updated 11:23 -05
50
Mixed
high confidence ⓘ
high · Forecast stability

Tonight's forecast has held steady across recent updates. 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.

Worth a short session
BEST 19:00–22:00 (3h)
Partly cloudy with some clear gaps with moderate moon interference. Some haze, so transparency is slightly reduced. Conditions are changeable, so check again closer to the time.
Sunset
17:48
Sunrise
05:14
Usable Hours
4/10
Moon
79%
Visible Planets
☿ Mercury11° W
♂ Mars41° NE
♃ Jupiter37° NE
♄ Saturn75° N
⛢ Uranus56° N
♆ Neptune77° N
Sky darkness
City sky (Bortle 8-9)
SQM 17.7, estimated from satellite night lights. A property of the place, separate from tonight’s score. How we estimate this
Open Full Cusco, Peru Forecast →
Hour-by-hour scores · Planet rise/set & visibility · ISS & satellite passes · Moon detail · Full score breakdown · Aurora & observer profiles

Stargazing in Cusco, Peru

Cusco, in the Peruvian Andes at 3,400m, sits under thin, clear high-altitude air with quick access to some of the darkest skies in South America. The Bortle 6 city glow gives way to Bortle 2–3 skies in the surrounding Sacred Valley and high Andes. At 13.5°S, the galactic core passes nearly overhead, and the southern Milky Way is spectacular. Andean astronomy has deep roots — the Inca read dark-cloud constellations in the bright band of the Milky Way, structures visible only under genuinely dark skies. The dry season (May to October) offers the clearest, most reliable nights.

Cusco, Peru Stargazing FAQ

Is Cusco good for stargazing?∨
Yes — at 3,400m, the thin Andean air gives excellent transparency, and dark Bortle 2-3 skies are close by in the Sacred Valley and high Andes. The galactic core passes nearly overhead at 13.5°S.
What is special about the sky over Cusco?∨
The southern Milky Way is spectacular, and Andean astronomy reads dark-cloud constellations — shapes formed by dust lanes in the bright galactic band — that the Inca recognised. These are only visible under genuinely dark, transparent skies like the high Andes offer.
When is the best time to stargaze near Cusco?∨
The dry season (May to October) brings the clearest, most reliable nights, with the galactic core high in the southern-hemisphere winter. The wet season (November-March) is cloudier. High-altitude nights are cold year-round.

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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