Stargazing near London tonight

London is closer to Bruce Peninsula and Point Pelee than to Muskoka — your best dark-sky hops go west and south.

Updated: · Tonight: Friday, August 14, 2026

Best dark-sky site near London tonight

★ Best tonight

Binbrook

Hamilton, ON · Bortle 5 · 118 km away

Excellent 6h of clear sky (≤30% cloud) during tonight's astronomical night, mean cloud 19%.

Best clear window: Fri 5:00 p.m. – Fri 10:00 p.m. (6h, 4% mean cloud)

Moon: New moon · 2% illuminated

Open live forecast → Site guide

How we picked tonight's best site

Show ranking debug panel (4 candidates, 7-level tie-break)

Binbrook Lost on verdictRank to Pinery (but earlier rule decided).

Site Verdict Window Win cloud Min cloud Mean cloud Bortle Distance
Pinery Good (4) 4h 8% 0% 49% 4 56.1 km
★ Binbrook Excellent (5) 6h 4% 0% 19% 5 118.3 km
Point Pelee Good (4) 3h 9% 0% 43% 4 153.9 km
Geauga Observatory Park Good (4) 4h 1% 0% 36% 4 157.8 km

★ = chosen by tie-break ladder. Lower cloud %, lower Bortle, lower distance = better. Higher windowHours = better.

Tie-break ladder (in order)

  1. verdictRank (desc) — Excellent > Good > Fair > Poor > No-go
  2. windowHours (desc) — Longer clear window wins
  3. windowMeanCloudPct (asc) — Cleaner sky inside the window
  4. tonightMinCloudPct (asc) — Best moment of the night
  5. tonightMeanCloudPct (asc) — Overall sky quality
  6. bortle (asc) — Darker site wins
  7. distanceKm (asc) — Closer wins last

Same metrics are exposed at snapshot.json as bestTonight.tieBreak and closestSites[].tieBreak.

Understand tonight's forecast for London

Each verdict above blends four limiting factors. Tap a card to learn what it measures, where the number comes from, and how to use it.

📖 How to read the forecast Plain-English breakdown of every row, color and score. 🌙 Moon & tonight's window New moon · 2% illuminated ☁️ Cloud cover & sky score Mean cloud tonight: 19% (min 0%). 🔭 Transparency How clean the air column is — controls how faint a star you can see. 🔥 Smoke & AQI Wildfire smoke and PM2.5 from US-AQI — kills transparency before clouds do.

All 4 closest sites, ranked by distance

Pinery

Lake Huron shore, ON · Bortle 4 · 56 km away

Good 4h clear window during astronomical night, mean cloud 49%.

Best clear window: Fri 7:00 p.m. – Fri 10:00 p.m. (4h, 8% mean cloud)

Moon: New moon · 2% illuminated

Open live forecast → Site guide

Binbrook

Hamilton, ON · Bortle 5 · 118 km away

Excellent 6h of clear sky (≤30% cloud) during tonight's astronomical night, mean cloud 19%.

Best clear window: Fri 5:00 p.m. – Fri 10:00 p.m. (6h, 4% mean cloud)

Moon: New moon · 2% illuminated

Open live forecast → Site guide

Point Pelee

Essex, ON · Bortle 4 · 154 km away

Good 3h clear window during astronomical night, mean cloud 43%.

Best clear window: Fri 8:00 p.m. – Fri 10:00 p.m. (3h, 9% mean cloud)

Moon: New moon · 2% illuminated

Open live forecast → Site guide

Frequently asked questions

Where can I stargaze near London tonight?

Tonight's best site near London is Binbrook (118 km away). Verdict: Excellent. 6h of clear sky (≤30% cloud) during tonight's astronomical night, mean cloud 19%.

What is the closest dark-sky site to London?

Pinery is the closest, about 56 km from London (Bortle 4).

Can I see the Milky Way from London?

London's urban sky is too light-polluted for naked-eye Milky Way. For a clear view of the galactic band, drive to a Bortle 1–3 site.

When are northern lights visible near London?

Aurora is visible during geomagnetic storms with Kp ≥ 5–6. Check the live aurora outlook and head to the closest dark site with a clean northern horizon.

Other Ontario cities