Northern Lights Map & Aurora Forecast

See next to real-time aurora forecast with clear sky detection. Discover the best locations to see the northern lights tonight with our interactive map.

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How to use our northern lights forecast

To accurately predict when and where you can see the northern lights, we track three 3 essential measurements: KP index 1, HPI 2, and Bz 3. Understanding these values will help you find the best time to see this spectacular phenomenon.

What is the Kp Index?

1

The Kp Index is the most important measurement for aurora viewing, ranging from 0 to 9. The Kp-index does not have a physical unit - it is a quasi-logarithmic scale that measures the global geomagnetic disturbances caused by solar wind.

Kp 0-2: Weak Activity
Common
Only visible near the Arctic Circle under perfect conditions. Best spots: Northern Scandinavia.
Kp 3-4: Good Conditions
Common
Visible in places like Tromsø, Abisko, and Iceland. Perfect for planned aurora trips.
Kp 5-6: Storm Levels
Uncommon
Can reach southern Scandinavia and northern UK. Worth traveling to see!
Kp 7-9: Major Storm
Rare
Visible at mid-latitudes. Extremely rare but spectacular displays.

What is HPI?

2

The Hemispheric Power Index measures the total energy of the aurora in gigawatts (GW).

Below 20 GW: Low Power
Faint auroras, typically only visible with cameras or in perfect conditions.
20-35 GW: Good Activity
Visible to the naked eye in dark locations. Good photography conditions.
35-50 GW: Strong Display
Bright, dynamic auroras. Excellent for both viewing and photography.
Above 50 GW: Intense Activity
Very bright and active. Can sometimes be seen despite light pollution.

What is Bz?

3

The solar wind's magnetic direction that triggers aurora activity when pointing south (negative values).

Above 0 nT
Stable conditions. Lower chance of aurora activity.
0 to -5 nT
Mild conditions. Aurora possible in usual locations.
-5 to -10 nT
Good conditions for aurora formation. Worth monitoring.
Below -10 nT
Strong magnetic storm conditions. High chance of aurora activity.

Viewing Tips

Info

Follow these guidelines to maximize your chances of seeing the aurora.

Best Viewing Locations

  • ALWAYS
    Choose a dark location away from city lights

Best Timing

  • VISIBLE
    4 PM - 8 pm local
  • PEAK
    9 PM - 2 AM local

Weather Conditions

  • CHECK
    Cloud coverage before heading out

Real-Time Monitoring

View Forecast TableOpen Aurora Map