Aurora Borealis in Finland
95 places with a forecast · Kp 3 to 7 · updated daily
Aurora borealis forecasts in Finland
There is no single aurora borealis forecast for Finland, and any number offered as one would be wrong almost everywhere in it. The auroral oval reaches part of the country on a quiet night and the rest of it only during a storm: Kemi needs Kp 3, while Helsinki needs Kp 7 — a storm level that arrives a fraction as often.
So this page is a directory rather than a forecast. Each of the 95 places below has its own page with tonight’s hourly odds, the next 30 nights, and the drive to darker sky that matters more than the forecast does.
Where the aurora borealis is visible on the most nights in Finland
Counting only nights when the storm was strong enough for that location and the sky there was dark enough at the same time. That is why the far north of Finland does not automatically top the list: the closer a place is to the pole, the more of its summer never gets dark at all.
| Place | Kp needed | Nights / year |
|---|---|---|
| Kemi | Kp 3 | 108.1 |
| Tornio | Kp 3 | 107.5 |
| Rovaniemi | Kp 3 | 105.7 |
| Turku | Kp 5 | 20.6 |
| Nurmijärvi | Kp 5 | 20.6 |
| Vihti | Kp 5 | 20.6 |
| Salo | Kp 5 | 20.6 |
| Raisio | Kp 5 | 20.6 |
NOAA planetary Kp, 2016-04-02 to 2026-03-30
Every place in Finland with a forecast
All 95 of them, grouped by region, with the Kp each one needs before the aurora borealis clears its northern horizon. Lower is better.
Kanta-Häme
- ForssaKp 5
- HämeenlinnaKp 5
- JanakkalaKp 5
- RiihimäkiKp 5
North Ostrobothnia
- HaukipudasKp 5
- KuusamoKp 5
- OuluKp 5
- RaaheKp 5
North Savo
- IisalmiKp 5
- KuopioKp 5
- SiilinjärviKp 5
- VarkausKp 5
Pirkanmaa
- HervantaKp 5
- KangasalaKp 5
- LempääläKp 5
- NokiaKp 5
- PirkkalaKp 5
- Pohjois-HervantaKp 5
- SastamalaKp 5
- TampereKp 5
- ValkeakoskiKp 5
- YlöjärviKp 5
South Karelia
- ImatraKp 5
- LappeenrantaKp 5
South Savo
- MikkeliKp 5
- SavonlinnaKp 5
Southwest Finland
- KaarinaKp 5
- LietoKp 5
- LoimaaKp 5
- RaisioKp 5
- SaloKp 5
- TurkuKp 5
- UusikaupunkiKp 5
- VäståbolandKp 5
Uusimaa
- East HelsinkiKp 7
- EspooKp 7
- EspoonlahtiKp 7
- HaagaKp 7
- HelsinkiKp 7
- HerttoniemiKp 7
- HyvingeKp 5
- JärvenpääKp 7
- KaarelaKp 7
- KallioKp 7
- KeravaKp 7
- KirkkonummiKp 7
- KlaukkalaKp 7
- LaajasaloKp 7
- LauttasaariKp 7
- LeppävaaraKp 7
- LohjaKp 7
- LovisaKp 7
- MatinkyläKp 7
- MellunkyläKp 7
- MunkkiniemiKp 7
- MyyrmäkiKp 7
- MäntsäläKp 5
- NurmijärviKp 5
- OlariKp 7
- OulunkyläKp 7
- PitäjänmäkiKp 7
- PorvooKp 7
- SibboKp 7
- SuurmetsäKp 7
- SuutarilaKp 7
- Taka-TöölöKp 7
- TuusulaKp 7
- VantaaKp 7
- VartiokyläKp 7
- VihtiKp 5
- ViikkiKp 7
- VuosaariKp 7
What the Kp number means
Kp grades the strength of a geomagnetic storm from 0 to 9. The higher it runs, the further from the pole the auroral oval spreads, so every place has a Kp at which the aurora borealis first reaches it — that is the number beside each link above. In Finland those thresholds run from Kp 3 to Kp 7. A place at Kp 3 is inside the oval on an ordinary quiet night; one at Kp 7 needs a severe storm, and those come a handful of times per solar cycle.
Know when it is worth going outside
Revon watches the forecast for the exact spot you are standing in, anywhere in Finland, and pushes an alert when tonight’s odds clear your threshold — no checking, no guessing.
Common questions about the aurora borealis in Finland
Can you see the aurora borealis in Finland?
Yes, in all 95 places in Finland with a forecast page: each averages at least one viable night a year, and Kemi leads them at 108.1 nights.
Where in Finland is the aurora borealis seen most often?
Kemi. It needs Kp 3 and averages 108.1 viable nights a year, more than anywhere else in Finland we publish a forecast for. Further north is not automatically better: the closer a place is to the pole, the more of its summer never gets dark at all.
What Kp index do you need to see the aurora borealis in Finland?
Between Kp 3 and Kp 7, depending where you stand. Kemi needs Kp 3; Helsinki needs Kp 7, and storms that size are a small fraction as frequent.
Is there one aurora borealis forecast for the whole of Finland?
No. The auroral oval reaches some parts of Finland on a quiet night and others only in a severe storm, so a countrywide number would mislead more than it told you. The forecast is published per place, so open the page for where you will actually be.