Aurora forecast Tromsø
Northern Lights tonight in Tromsø
Updated
Aurora possible but cloudy: Kp 1.7 forecast, about 87% cloud overnight Tromsø needs about Kp 0; watch for breaks in the cloud.
Will you see the northern lights from Tromsø, Troms, Norway tonight? We combine NOAA's Kp forecast, the OVATION aurora model, cloud cover and the hours of darkness. Times are local (Europe/Oslo).
- Kp now
- 1.7 quiet, estimated
- Max Kp forecast tonight
- 1.7 quiet
- Kp needed at Tromsø
- about 0 geomagnetic latitude 67.5°
- Cloud cover tonight
- 87% average lowest 78%
- Dark sky
- 5:30 pm – 5:30 am Sun 12° below the horizon
- Aurora probability in view now
- 5% NOAA OVATION, 30–90 min ahead
- Moon
- 99% lit Full Moon
Tonight in Tromsø
Tromsø sits at a geomagnetic latitude of 67.5° N, close to the auroral oval itself, so aurora is possible even on quiet nights (Kp 0–1) whenever the sky is dark and clear. Tonight's NOAA forecast peaks at Kp 1.7 (quiet) during the dark hours, which is enough for Tromsø.
Open-Meteo expects about 87% cloud cover on average between 6 pm and 6 am local time, with no mostly clear hours.
The Moon is 99% illuminated (full moon), bright enough to wash out a faint aurora, so only a stronger display will stand out. For the best view look up: the oval is often overhead or even to the south, from somewhere away from street lights.
Right now NOAA's OVATION model gives up to 5% chance of aurora in the part of the sky visible from Tromsø. OVATION is a short-range nowcast (30 to 90 minutes ahead), useful for deciding whether to step outside now.
| Local time | Kp forecast | Cloud cover | Aurora chance |
|---|---|---|---|
| Mon 6 pm | 1.3 | 82% | Active, but cloudy |
| Mon 7 pm | 1.7 | 92% | Active, but cloudy |
| Mon 8 pm | 1.7 | 78% | Active, but cloudy |
| Mon 9 pm | 1.7 | 88% | Active, but cloudy |
| Mon 10 pm | 1.7 | 94% | Active, but cloudy |
| Mon 11 pm | 1.7 | 86% | Active, but cloudy |
| Tue 12 am | 1.7 | 88% | Active, but cloudy |
| Tue 1 am | 1.7 | 84% | Active, but cloudy |
| Tue 2 am | 1.7 | 85% | Active, but cloudy |
| Tue 3 am | 1.7 | 86% | Active, but cloudy |
| Tue 4 am | 1.3 | 91% | Active, but cloudy |
| Tue 5 am | 1.3 | 94% | Active, but cloudy |
3-day Kp forecast
3 of the next 3 days reach the Kp 0 that Tromsø needs. Kp is a global 0–9 index of geomagnetic activity, issued in 3-hour blocks (UTC); NOAA forecasts beyond 24 hours are uncertain, because storms are triggered by solar eruptions that take 1–3 days to arrive.
| Day (UTC) | Max Kp | Level | Enough for Tromsø? |
|---|---|---|---|
| 2026-10-26 | 1.7 | quiet | Yes |
| 2026-10-27 | 1.7 | quiet | Yes |
| 2026-10-28 | 1.7 | quiet | Yes |
Why Tromsø sees aurora on quiet nights
The aurora forms in an oval around the geomagnetic pole, which sits in the Canadian Arctic (about 80.8° N, 72.8° W), not at the geographic pole. That is why the Kp a city needs depends on its geomagnetic rather than its geographic latitude. At Kp 0 the oval's edge is near 66° geomagnetic; each step of Kp pushes it roughly 2° toward the equator.
At 67.5° geomagnetic, Tromsø lies under the usual position of the auroral oval: on quiet nights the aurora is often overhead, and during strong storms (Kp 5+) the oval can move equatorward past the city, so the display may then be to the south.
Aurora forecast for nearby cities
More sky and weather
Data: NOAA SWPC (Kp, OVATION), Open-Meteo, GeoNames.