Live Sky Report
What Can I See in the Sky Tonight in Santo Tirso, Porto, Portugal?
New Moon moon at 0%, Venus shines at magnitude -4.4. Calculated for 41.34°, -8.48° (Europe/Lisbon).
Visible planets tonight
Venus, Jupiter, Mercury, Saturn, Mars — brightest: Venus at mag -4.4 in Virgo
🔭 Tonight's Sky Report
📍 Santo Tirso, Porto, Portugal — Wednesday, August 12
Tonight's sky above Santo Tirso, Porto, Portugal
Whether tonight is a good night for stargazing from Santo Tirso, Porto, Portugal comes down to four real things: the Moon phase, cloud cover, which planets are up, and the current Kp index.
Above Santo Tirso, Porto, Portugal tonight (41.34°, -8.48°), expect a new moon moon at 0% illumination. The night gives 6.6 hours of true astronomical darkness. At 41.3°, aurora needs a strong storm — roughly Kp 8.5 or higher — to reach Santo Tirso, Porto, Portugal.
Local sky character in Santo Tirso
Northern mid-latitudes · northern hemisphere · 81 m elevation
- The north celestial pole stands 41.3° above the horizon, so stars within 41° of it never set from here.
- About 83% of the whole sky rises above the horizon at some point in the year from this latitude.
- The Milky Way's core in Sagittarius culminates about 19.7° up, staying low, so a clear southern horizon matters.
- At 81 m elevation, roughly 1% of the atmosphere's mass is already below you, which measurably reduces extinction near the horizon.
Santo Tirso is small enough that local light domes are limited — on a clear, moonless night the Milky Way is realistically within reach.
Best nights this month in Santo Tirso
Calculated for these coordinates and today's date — not a fixed list.
- 2026-08-12 — Darkest night of the coming month
The Moon is only 0% illuminated, giving the least lunar interference in the next 30 nights — the best window for the Milky Way and faint deep-sky targets from Santo Tirso, Porto, Portugal.
- 2026-08-12 — Perseids peak — up to 100/hour
Radiant in Perseus. Favours the Northern Hemisphere, which includes Santo Tirso, Porto, Portugal. The Moon is 2% lit on peak night, so lunar interference is none.
- 2026-08-27 — Full Moon
A 100%-lit Moon washes out faint objects, but lunar terrain along the limb is at its most striking — plan bright targets and planets instead of deep sky.
Santo Tirso, Porto, Portugal stargazing questions
- What can I see in the sky tonight from Santo Tirso, Porto, Portugal?
- Tonight from Santo Tirso, Porto, Portugal expect a new moon Moon at 0% illumination, with these naked-eye planets above the horizon after dark: Venus, Jupiter, Mercury, Saturn, Mars. The night offers about 6.6 hours of true astronomical darkness.
- Is light pollution a problem in Santo Tirso, Porto, Portugal?
- Santo Tirso, Porto, Portugal is small enough that the Milky Way can be visible on clear, moonless nights away from the immediate centre. This page's Moon and darkness figures tell you the other half of the story.
- When can I see the Milky Way from Santo Tirso, Porto, Portugal?
- The core reaches about 19.7° altitude, so target the moonless nights listed in the best-nights section and get away from the city core.
- How dark does it actually get in Santo Tirso, Porto, Portugal tonight?
- About 6.6 hours of astronomical darkness (Sun more than 18° below the horizon). That is the real observing window for faint objects; brighter targets are workable from dusk onward.
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