Roque / La Palma stargazing forecast — Saturday, August 15

Canary Islands, Spain · Bortle 1 · 28.757, -17.885 · Snapshot generated Sat, 15 Aug 2026 02:05:09 GMT

Poor (Medium confidence)

No sustained clear window; brief gaps possible (min cloud 13%).

Best observing window tonight

Sat 10:00 p.m. – Sat 10:00 p.m. (1h, 13% mean cloud)

Astronomical night: Sat 9:51 p.m. → Sun 8:41 a.m.
Moon: Waxing crescent · 7% illuminated
Mean cloud (during night): 85% (min 13%)

Site

Roque de los Muchachos at 2,400 m on La Palma is one of the three best professional astronomy sites in the world. The Gran Telescopio Canarias is here — and the public can visit the summit ridge at night.

Drive from Toronto: ≈ 1.5 h drive from Santa Cruz de La Palma up the LP-4 to the summit.

Best time of year: Year-round; the summit sits above the trade-wind inversion 300+ nights a year.

Open the live 48-hour forecast →

Citations & data sources

Open-Meteo Forecast API (cloud, humidity, wind, visibility)
Open-Meteo astronomical data (sunrise, sunset, moon)
Bortle scale reference for site darkness
Editorial guide for Roque / La Palma: /sites/roque-los-muchachos.txt
Structured site data: /sites/roque-los-muchachos.json
Live MCP server (AI agents): https://koohxdehsweadgdegrly.supabase.co/functions/v1/mcp

This is a build-time snapshot — the live forecast at https://ontarionightsky.com/?site=roque-los-muchachos updates continuously.