Northern Lights in Finland Tonight
Can you see the northern lights in Finland? Yes, in Lapland above all. Rovaniemi, on the Arctic Circle, needs only Kp 1+ by NOAA’s rule and Oulu 2; Helsinki, in the south, needs 4+, which comes on about 1,454 days in an 11-year solar cycle. Rovaniemi is too light from May to August; by mid-September it has 6.7 hours of darkness.
Type where you are: the Kp your spot needs, NOAA’s forecast for your dark hours tonight and the next two nights, the moon, and which way to look.
Fairbanks, AK · magnetic latitude 65.7°
You need Kp 0+By NOAA’s rule the aurora’s edge reaches Fairbanks at Kp 0+. Loading NOAA’s forecast for tonight…
- Kp you need
- 0+ overhead
- Look toward
- north-northeast
Kp forecast: NOAA Space Weather Prediction Center. Places: GeoNames.
The forecast above opens on Rovaniemi, Lapland, FI: type your own town, or use your location, for tonight’s answer where you are.
What Kp does Finland need?
NOAA’s rule: “At Kp = 0, the equator ward edge of the auroral oval is approximately 66 degrees.” “And it moves equatorward about 2 degrees for each level of Kp.” That is in magnetic latitude — NOAA: “This relationship holds true in geomagnetic latitude, not geographic.” — so a town needs a Kp of (66 − its magnetic latitude) ÷ 2. In a big storm the aurora can also be seen from farther away, low on the horizon: NOAA’s storm scale says how low it “has been seen” at Kp 6 to 9.
| Town | Magnetic latitude | Kp overhead | Low on the horizon | Days per 11-year cycle | Look toward |
|---|---|---|---|---|---|
| Rovaniemi, Lapland, FI | 63.6° | 1+ | – | – | north-northwest |
| Oulu, North Ostrobothnia, FI | 62.3° | 2 | – | – | north-northwest |
| Helsinki, Uusimaa, FI | 57.8° | 4+ | – | Kp ≥ 5: 1,454 | north-northwest |
The farther toward the magnetic pole, the lower the Kp: Rovaniemi needs the least of these towns and Helsinki the most. NOAA adds a warning worth keeping: “It should be noted that the relationship between Kp and auroral latitude are approximate and represent averages.”
When is it dark enough in Finland?
NOAA: “The aurora is not visible during daylight hours.” These are the hours with the Sun 12° or more below the horizon (the end of nautical twilight) on the night after the 15th of each month. Rovaniemi has none from May to August. “The best Seasons for aurora watching are around the spring and fall equinoxes.”
| Month | Rovaniemi | Oulu |
|---|---|---|
| January | 14.5 h | 14.3 h |
| February | 11.8 h | 11.8 h |
| March | 8.5 h | 8.8 h |
| April | 2.8 h | 3.8 h |
| May | 0 h | 0 h |
| June | 0 h | 0 h |
| July | 0 h | 0 h |
| August | 0 h | 0 h |
| September | 6.7 h | 7 h |
| October | 10.7 h | 10.7 h |
| November | 13.7 h | 13.7 h |
| December | 15.3 h | 15 h |
Plan it
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- Northern Lights Tonight: the forecast for any town
FAQ
Can you see the northern lights in Finland?
Yes, when the Kp is high enough and the night is dark and clear. By NOAA’s rule, Rovaniemi needs Kp 1+, Oulu needs Kp 2, Helsinki needs Kp 4+. NOAA’s storm scale counts days only from Kp 5 (G1), and Rovaniemi needs less; NOAA: “It should be noted that if you are in the right place under the aurora, you can see very nice auroral displays even with low geomagnetic activity (Kp = 3 or 4).”
Can I see the northern lights tonight in Finland?
Only NOAA’s forecast for tonight can say: the tool at the top of this page reads it for Rovaniemi (or your own town) and compares it with what Rovaniemi needs: Kp 1+. Look north-northwest, away from city lights; NOAA: “Best aurora is usually within an hour or two of midnight (between 10 PM and 2 AM local time).”
When is the best time to see the northern lights in Finland?
Not from May to August: Rovaniemi has no night dark enough then, and NOAA: “So combining a summer vacation to the arctic with aurora watching usually doesn’t work.” Rovaniemi has its longest nights in December (15.3 hours of darkness). NOAA adds: “The best Seasons for aurora watching are around the spring and fall equinoxes.”
What Kp do you need to see the northern lights in Finland?
Rovaniemi, at magnetic latitude 63.6°: Kp 1+ overhead; Oulu, at magnetic latitude 62.3°: Kp 2 overhead; Helsinki, at magnetic latitude 57.8°: Kp 4+ overhead. The rule is NOAA’s: the oval’s edge is at about 66° magnetic latitude at Kp 0 and moves about 2° toward the equator for each level of Kp.
Can you see the northern lights in Helsinki?
Sometimes. By NOAA’s rule Helsinki needs Kp 4+. Kp 5 or more comes on about 1,454 days in an 11-year solar cycle (NOAA’s storm scale). Its own lights make it harder: NOAA says “Get away from city lights.”
How these numbers are made
Magnetic latitude is the dipole’s, with the pole from the IGRF-14 coefficients (NOAA NCEI / IAGA). The Kp overhead is NOAA’s rule, “low on the horizon” and the days per cycle are NOAA’s storm scale, and tonight’s Kp in the tool is NOAA’s 3-day forecast. Darkness is the Sun’s position, computed for 2026. Towns: GeoNames (CC BY 4.0). Rules checked 2026-09-27.