Tonight in Koper: Aurora is unlikely in Koper right now. The sky is not dark enough yet. AuroraMe watches Kp, clouds and darkness for this location and sends a free alert when the next viewing window opens.
aurora visibility now
Unlikely
Wait for darkness
Kp now 3.7 need 9+
Clouds 100% Mixed
Sky Daylight visibility
Weather data by Open-Meteo.com Licensed under CC BY 4.0. Modified by AuroraMe: location snapped to a privacy-preserving 0.25° grid and values rounded for display.
Get a 72-hour aurora forecast and free alerts for Koper AuroraMe tracks Kp, clouds and darkness for Koper, then sends a free push when the next viewing window opens.
Forecast
Scan the next hours here. The free app watches the longer window and sends alerts when conditions improve.
Time
Kp
Visibility
30.08, Today
11:00
2.7
Unlikely
12:00
2.7
Unlikely
13:00
2.7
Unlikely
14:00
2.0
Unlikely
15:00
2.0
Unlikely
16:00
2.0
Unlikely
Kp Index: 27-Day Forecast
Predicted geomagnetic activity based on solar rotation cycle.
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aurora nights per year
Kp ≥ 9 · 11 years of data
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Dec
#1
Sep Loading data...
Planning a trip? Find the best month and how many nights to stay
📅 All 12 months ranked 🛏️ Min nights for 80% chance 🔔 Push alert 1h before aurora 🌙 72h hour-by-hour forecast
Why this forecast?
Aurora Zone
Higher magnetic latitude = better aurora visibility. Your location's magnetic latitude determines how often auroras appear overhead.
Status Levels:
Perfect Above 62.0° - Excellent aurora visibility (daily activity)
Good 56.0° - 62.0° - Good aurora visibility (regular storms)
Acceptable 50.0° - 56.0° - Fair aurora visibility (strong storms only)
Low Below 50.0° - Poor aurora visibility (extreme storms)
Aurora Zone
Low 40.7°
Kp index
Kp measures global magnetic disturbance. Higher Kp = stronger auroras visible at lower latitudes.
Status Levels:
Storm Kp 6-9 - Geomagnetic storm, strong auroras
Good Kp 3-6 - Moderate activity, good conditions
Low Kp 1-3 - Low activity, weak auroras
Very Quiet Kp 0-1 - Very quiet, minimal auroras
Kp index
Good 3.7
Cloud Cover Impact
Clear skies are essential for aurora viewing. Clouds block your view of the northern lights. The percentage shows cloud coverage (0% = clear skies, 100% = overcast).
Status Levels:
Clear Clear (0-25%) - Perfect for aurora viewing
Partly Cloudy Partly Cloudy (26-50%) - May partially block view
Cloudy Cloudy (51-85%) - Significantly blocks aurora
Overcast Overcast (85%+) - Blocks aurora completely
Cloud Cover Impact
⛅ Partly Cloudy 100%
Moonlight
Bright moonlight can wash out faint auroras. New moon provides the darkest skies for optimal viewing.
Status Levels:
New Moon Darkest skies - Best for faint auroras
Crescent Dim moonlight - Good for viewing
Quarter Moderate moonlight - May wash out weak auroras
Gibbous Bright moonlight - Reduces aurora visibility
Full Moon Very bright - Only strong auroras visible
Moonlight
🌔 Gibbous 87%
Darkness
Darker skies are essential for aurora viewing. The sun must be below the horizon for auroras to be visible.
Status Levels:
Night Darkest conditions - Optimal for auroras
Astronomical Twilight Dark enough - Good aurora viewing
Nautical Twilight Getting darker - Weak auroras may appear
Daylight Sun is above horizon - No aurora visible
Darkness
Daylight
Get Alerted Before Aurora Appears
Push alerts 20–90 min before northern lights. 72h forecast, cloud cover, 11 years of historical data.
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Trip Planner: Best Days & Best Month
Aurora is Rare in Koper — But Not Impossible
Kp 9+ needed to see aurora here
0 possible aurora nights in the next 27 days
Sep, Oct, Mar, Apr best months to visit
Aurora Borealis Viewing in Koper
Adriatic port with minimal aurora potential.
Koper sits at 40.7° magnetic latitude, which means aurora typically becomes visible when the Kp index reaches 9+. Aurora sightings in Koper require stronger geomagnetic storms (Kp 9+), which occur a few times per year. When storms do hit, the best viewing window is 10 PM to 2 AM local time under clear, dark skies.
Cloud cover is the most common reason people miss aurora even during strong storms. AuroraMe combines the Kp index with real-time cloud forecasts, moon phase, and darkness data to give you a single visibility status — so you know whether it's worth going outside tonight.
For the broader storm picture before checking Koper, start with the broader forecast hub and the geomagnetic storm tracker. Low-latitude places like Koper usually need a severe geomagnetic storm, clear northern horizon, and full darkness before northern lights become realistic.
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Planning a trip? See the best months for Koper → • Northern lights tonight — all cities →
Learn More About the Northern Lights
- How to See the Northern Lights — Beginner's Guide
- Kp Index Explained — What It Means for Aurora
- Best Time to See the Northern Lights
- Geomagnetic Storms Explained — G1–G5 Scale
- Best Aurora Forecast Apps (Free & Paid)
- Northern Lights vs Aurora Borealis — The Same Thing?
- Can You See the Aurora With the Naked Eye?
Northern Lights in Koper: Quick Guide
Minimum Kp Needed
9.0+
Viewing Frequency
extremely rare
Current Kp Index
3.7
How often can you see northern lights in Koper?
Based on its magnetic latitude of <strong>40.7°</strong>, aurora viewing in Koper is <strong>extremely rare (visible only during exceptional geomagnetic storms)</strong>. We are currently near solar maximum (2024-2025), so expect higher-than-average activity.
Best viewing season: September to March, with peak activity during equinoxes (September and March).
What Kp index do I need to see aurora in Koper?
For Koper, you need a minimum Kp index of <strong>9.0</strong> for aurora to be visible. This threshold is calculated based on the city's magnetic latitude (40.7°).
Higher Kp values produce brighter, more active displays:
- Kp 9.0+: Strong, colorful displays visible even with some light pollution
Current Kp index: 3.7
Where should I look for aurora in Koper?
Aurora is rarely visible this far south. When it does appear during extreme storms (Kp 7+), look for a faint glow on the northern horizon.
For best results, seek locations with minimal light pollution and unobstructed views of the sky. From Koper, aurora typically remains closer to the horizon, so elevated viewing locations help.
Can I see northern lights tonight in Koper?
Unlikely: Aurora unlikely tonight with Kp 3.7 (below 9.0 threshold for Koper). Enable alerts to catch future opportunities.
Real-time conditions: 100% cloud cover, Aurora Score 0/100. Check the live forecast above for the latest updates.
Traveling? Track multiple locations easily
Compare aurora chances across cities and get alerts for all your planned destinations.
For brighter shows consider Fairbanks , Yellowknife