Aurora tonight
Kp 4.7 max forecast
Slight: camera only, very dark northern horizon Clear skies to the north matter most; the coast spots and Loch Doon have the best northern views.
AuroraWatch UK: No significant activity · 17:51 UK
Kp: NOAA Space Weather Prediction Center 3-day forecast (3-hourly; faded bars are observed). Status: AuroraWatch UK, Lancaster University.
How the score works
Each hour gets a score from 0 to 100. We start at 100 and multiply by:
- Cloud: (1 − low) × (1 − 0.9 × mid) × (1 − 0.6 × high). Low cloud blocks everything; thin high cloud only dims the sky.
- Darkness: 1 when the Sun is more than 18° below the horizon, 0.6 in astronomical twilight (12–18°), 0 before that.
- Moon: up to −60% when a bright Moon is high; no penalty when it has set.
- Rain: 0 if 0.1 mm or more is forecast.
- Visibility: 0.3 under 2 km (fog), 0.75 under 8 km (haze).
- Dew / fog risk: 0.85 when the air is within 2 °C of its dew point or humidity is 95%+. Bring a lens heater.
- Wind: 0.85 above 15 mph and 0.6 above 25 mph (tripod shake).
Excellent is 70+, Good 50+, Fair 30+, Poor 10+. The best window is the run of hours within 15 points of the night’s best. Aurora and 7Timer seeing are shown separately and are not in the score.
Weather: Open-Meteo best match (Met Office UKV, ECMWF), hourly. Sun and Moon: calculated with SunCalc. Seeing/transparency: 7Timer ASTRO. Times are UK local.