Tonight
Aug 26 - Aug 27
- 4 °C
0 percent cloud cover - 3 °C4 percent cloud cover
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Northern Lights Forecast for Ruka
Ruka, Lapland, Finland
66°9′55.4″N ⋅ 29°9′5.8″E
Aurora data last updated at
Current local time:
Aurora activity is expected to be moderate between 9 PM and 12 AM in Ruka tonight. Sky will be dark from 11:29 PM to 2:33 AM local time. Cloud cover around that time looks overcast at around 95%. There may be good aurora activity overhead, but thick cloud could block the view.
Aurora Forecast for Ruka
Today at 3:00 AM
Low Activity
Cloud Cover:4%
Aurora activity
High clouds
Middle clouds
Low clouds
Fog
Aurora activity
High clouds
Middle clouds
Low clouds
Fog
Hourly aurora forecast for Ruka
| Local time | Aurora activity |
|---|---|
| Low Activity | |
| Low Activity | |
| Low Activity | |
| No activity | |
| Low Activity | |
| Low Activity | |
| Moderate Activity | |
| Moderate Activity | |
| High Activity | |
| Moderate Activity | |
| Low Activity | |
| Low Activity | |
| Low Activity | |
| Low Activity | |
| Low Activity | |
| Moderate Activity |
3-Night Weather Forecast for Ruka
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Tomorrow night
Aug 27 - Aug 28
- 8 °C
95 percent cloud cover - 7 °C100 percent cloud cover
- 7 °C100 percent cloud cover
Friday night
Aug 28 - Aug 29
- 10 °C
16 percent cloud cover - 8 °C3 percent cloud cover
- 7 °C
43 percent cloud cover
Sun & Moon
Sunset
Sunrise
Dark from 11:29 PM to 02:33 AM (3 h 4 min)
Current Moon
Full Moon
98% illumination
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Long-Term Aurora Forecast for Ruka
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
Wednesday, August 26, 2026. Today. Low aurora activity. Aurora score 1 out of 10. Full moon, 97% illumination | Thursday, August 27, 2026. Low aurora activity. Aurora score 4 out of 10. Full moon, 100% illumination | Friday, August 28, 2026. Moderate aurora activity. Aurora score 5 out of 10. Full moon, 100% illumination | Saturday, August 29, 2026. Moderate aurora activity. Aurora score 4 out of 10. Full moon, 98% illumination | Sunday, August 30, 2026. Low aurora activity. Aurora score 3 out of 10. Waning gibbous, 94% illumination | ||
Monday, August 31, 2026. Low aurora activity. Aurora score 2 out of 10. Waning gibbous, 88% illumination | Tuesday, September 1, 2026. Low aurora activity. Aurora score 1 out of 10. Waning gibbous, 80% illumination | Wednesday, September 2, 2026. Low aurora activity. Aurora score 1 out of 10. Waning gibbous, 70% illumination | Thursday, September 3, 2026. Low aurora activity. Aurora score 1 out of 10. Last quarter, 60% illumination | Friday, September 4, 2026. Low aurora activity. Aurora score 1 out of 10. Last quarter, 48% illumination | Saturday, September 5, 2026. Low aurora activity. Aurora score 1 out of 10. Last quarter, 37% illumination | Sunday, September 6, 2026. Low aurora activity. Aurora score 1 out of 10. Waning crescent, 26% illumination |
Monday, September 7, 2026. Low aurora activity. Aurora score 1 out of 10. Waning crescent, 17% illumination | Tuesday, September 8, 2026. Low aurora activity. Aurora score 1 out of 10. Waning crescent, 9% illumination | Wednesday, September 9, 2026. Low aurora activity. Aurora score 1 out of 10. New moon, 3% illumination | Thursday, September 10, 2026. Low aurora activity. Aurora score 1 out of 10. New moon, 1% illumination | Friday, September 11, 2026. Low aurora activity. Aurora score 1 out of 10. New moon, 0% illumination | Saturday, September 12, 2026. Low aurora activity. Aurora score 1 out of 10. New moon, 2% illumination | Sunday, September 13, 2026. Low aurora activity. Aurora score 3 out of 10. Waxing crescent, 6% illumination |
Monday, September 14, 2026. Low aurora activity. Aurora score 2 out of 10. Waxing crescent, 12% illumination | Tuesday, September 15, 2026. Low aurora activity. Aurora score 1 out of 10. Waxing crescent, 20% illumination | Wednesday, September 16, 2026. Low aurora activity. Aurora score 1 out of 10. Waxing crescent, 28% illumination | Thursday, September 17, 2026. Low aurora activity. Aurora score 1 out of 10. First quarter, 37% illumination | Friday, September 18, 2026. Low aurora activity. Aurora score 1 out of 10. First quarter, 47% illumination | Saturday, September 19, 2026. Low aurora activity. Aurora score 1 out of 10. First quarter, 56% illumination | Sunday, September 20, 2026. Low aurora activity. Aurora score 1 out of 10. First quarter, 65% illumination |
Monday, September 21, 2026. Low aurora activity. Aurora score 1 out of 10. Waxing gibbous, 74% illumination | Tuesday, September 22, 2026. Low aurora activity. Aurora score 1 out of 10. Waxing gibbous, 82% illumination |
LowAurora ActivityHigh
Northern Lights in Ruka
Ruka is situated in Finland's Lapland area. While not directly under the standard auroral oval, its northern location at 66.2° makes it a very reliable viewing spot. Observers here simply need to escape local light pollution and look north on a clear night.
Aurora Season in Ruka
You can spot the aurora here anytime from September to March. While the dark winter months are most popular, the autumn and spring equinoxes often bring a statistical increase in geomagnetic activity.
FAQ
What Kp index do I need to see the northern lights in Ruka?
In Ruka, you usually need at least Kp 2 to have a reasonable chance of seeing the northern lights. Lower Kp can still bring a faint aurora display low on the northern horizon, but it is less common.
This is based on magnetic latitude, and Kp index is a global geomagnetic index, so treat it as a rule of thumb, not a location-specific guarantee.
Tonight, the NOAA Kp index forecast is around 3.7. That is above the usual Kp index threshold for Ruka, so you have a chance of seeing the aurora if the sky is clear.