🌌 London Night Sky — 2026-08-10

What a night ahead! After a stretch of stubborn cloud, London gets a near-perfect window tonight — a stellar observing card with the young Moon out of the way and Saturn climbing through the early hours.

🌤 Hour-by-Hour Conditions

The evening starts comfortable and slowly improves as the night deepens:

• 23:00 BST — 19.9°C, roughly a quarter sky covered (26% clouds), wind light at ~3 m/s, visibility a crisp 16 km. All clear flags — a green light to start setting up.
• 00:00 BST — A whisper more cloud (28%) but still dry, 19.2°C, wind easing to ~2.6 m/s. Conditions hold steady; don't pack up.
• 01:00 BST — The sky opens up: clouds drop to just 19%, temperature cools to a balmy 18.4°C, and the breeze stays gentle at 2.6 m/s. Peak conditions — the sky is at its most transparent after midnight.

No precipitation, no fog, no aurora — just a slow, steady improvement as the city cools and the air settles. This is a night to observe deep into the small hours.

🪐 Planets

Saturn is your solo planetary act tonight at magnitude +0.58 — a gorgeous, ringed gem. It transits at 04:37 BST, so it's low in the southeast during the late evening but climbs to its best, most stable view after ~02:00. Even through a modest scope the rings and Titan will be crisp; the calmer, cooler air after midnight will help steady the image.

🌙 The Moon

A delicate Waning Crescent at just 10% illumination — and better yet, it set at 19:39 this evening. The sky is completely Moon-free all night, giving you dark-sky bonus points even under London's Bortle 9 glow. At 363,000 km, it's swinging near perigee, but you won't be bothered by it tonight.

🔭 Recommended Targets

For a light-polluted urban sky, concentrate on high-surface-brightness objects:

• M13 & M5 — The two great globular clusters, both magnitude ~5.6–5.8. M13 in Hercules rides high in the west early evening; M5 follows in Serpens. Even at Bortle 9, a 6"+ scope will resolve the outer stars.
• M24 (Sagittarius Star Cloud) — A stunning naked-eye/wide-field patch of Milky Way starfields, best with binoculars in the south-southwest.
• M31 (Andromeda Galaxy) — The most ambitious target; at mag 3.4 it's technically visible, but expect just a soft, elongated glow of the core in the city. Worth attempting as the sky settles.
• M39 & M34 — Loose, bright open clusters in Cygnus and Perseus; easy wins for binoculars or a low-power eyepiece.

⚠️ Worth Noting

No ISS passes and no meteor shower activity are logged for tonight — the Perseids are still building toward their peak in a few nights, so this is a quiet-but-quality session. Use it to lock in those globulars and Saturn before the Moon returns.

Clear skies — get out there and grab the night! 🌠