Aurora forecast Saint-Eustache
Northern Lights tonight in Saint-Eustache, QC
Updated
Unlikely tonight (Kp 1.3 forecast; needs about Kp 5 at Saint-Eustache)
Will you see the northern lights from Saint-Eustache, Quebec, Canada tonight? We combine NOAA's Kp forecast, the OVATION aurora model, cloud cover and the hours of darkness. Times are local (America/Toronto).
- Kp now
- 1.7 quiet, estimated
- Max Kp forecast tonight
- 1.3 quiet
- Kp needed at Saint-Eustache
- about 5 geomagnetic latitude 54.8°
- Cloud cover tonight
- 43% average lowest 10%
- Dark sky
- 6:58 pm – 6:23 am Sun 12° below the horizon
- Aurora probability in view now
- 2% NOAA OVATION, 30–90 min ahead
- Moon
- 100% lit Full Moon
Tonight in Saint-Eustache
Saint-Eustache sits at a geomagnetic latitude of 54.8° N, so the aurora usually needs a Kp index of about 5 or higher before it rises above the northern horizon. Tonight's NOAA forecast peaks at Kp 1.3 (quiet) during the dark hours, 3.7 short of what Saint-Eustache needs.
Open-Meteo expects about 43% cloud cover on average between 11 pm and 7 am local time, with 4 of 8 dark hours mostly clear (30% cloud or less).
The Moon is 100% illuminated (full moon), bright enough to wash out a faint aurora, so only a stronger display will stand out. For the best view look north, low on the horizon, from somewhere away from street lights.
Right now NOAA's OVATION model gives up to 2% chance of aurora in the part of the sky visible from Saint-Eustache. 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 |
|---|---|---|---|
| Sun 11 pm | 1.3 | 88% | Unlikely |
| Mon 12 am | 1.3 | 19% | Unlikely |
| Mon 1 am | 1.3 | 59% | Unlikely |
| Mon 2 am | 1.3 | 44% | Unlikely |
| Mon 3 am | 1.3 | 24% | Unlikely |
| Mon 4 am | 1.3 | 10% | Unlikely |
| Mon 5 am | 1.3 | 12% | Unlikely |
| Mon 6 am | 1.3 | 85% | Unlikely |
3-day Kp forecast
None of the next 3 days reaches the Kp 5 that Saint-Eustache 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 Saint-Eustache? |
|---|---|---|---|
| 2026-10-26 | 1.7 | quiet | No |
| 2026-10-27 | 1.7 | quiet | No |
| 2026-10-28 | 1.7 | quiet | No |
Why Saint-Eustache needs Kp 5
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 North American cities see aurora further south than European cities at the same latitude. At Kp 0 the oval's edge is near 66° geomagnetic; each step of Kp pushes it roughly 2° toward the equator.
At 54.8° geomagnetic, Saint-Eustache needs about Kp 5 for aurora low on the horizon, Kp 7 or more for a display high in the sky.
Aurora forecast for nearby cities
More sky and weather
Data: NOAA SWPC (Kp, OVATION), Open-Meteo, GeoNames.