Aurora Borealis in Calgary
Canada · 51.05°, -114.09° · geomagnetic 57.6° · needs Kp 7
Tonight in Calgary
10%
Peak chance of a visible display tonight, from the same model the Revon app runs. Calgary needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 4.7. Short of the threshold, which is what most nights look like here.
Updated 2026-08-02 20:20 UTC
The next 30 nights in Calgary
Every night to come, scored the same way as tonight. The best of the open week is Sunday 2 Aug at 10%. Not one of the seven reaches the Kp 7 that Calgary needs, which is normal rather than unlucky — it averages 2.7 viable nights a year. The 23 nights past the seven-day window move with the 27-day solar rotation and are updated daily in the app.
Nights 8–30 unlock in the Revon app
Revon aurora model over the NOAA Kp forecast and 27-day outlook
How often the aurora borealis reaches Calgary
2.7 nights a year, averaged across 10.0 years of records
| Storm level | Nights / year |
|---|---|
| Kp 4 | 83.4 |
| Kp 5 | 28.7 |
| Kp 6 | 9.3 |
| Kp 7 | 3.2 |
| Kp 8 | 1.2 |
NOAA planetary Kp, 2016-04-02 to 2026-03-30
Wait for an alert; do not book a week
At Kp 7, Calgary needs a severe geomagnetic storm before anything shows above the northern horizon. Storms that size arrive a handful of times per solar cycle and announce themselves a day or two ahead. Watching for one beats picking dates and hoping.
Hours of true darkness, month by month
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 11.6 | 10.3 | 8.6 | 6.0 | 2.6 | 0.0 | 0.0 | 4.8 | 7.7 | 9.8 | 11.3 | 12.0 |
Solar declination and hour angle at −18°
Nothing to see from June to July
Through those months the sun never falls more than 18° below the Calgary horizon, so the sky never darkens fully. Plan around the darker half of the year.
Getting clear of the light
With 1,306,784 people around you, the sky over central Calgary is Bortle 8. The glow hides anything but the brightest display, so the drive out matters more here than the forecast does.
- 32 km north-east — around Rocky View County → Bortle 5
- 46 km east-north-east — around Rocky View County → Bortle 4
Falchi 2016 World Atlas (DOI: 10.5880/GFZ.1.4.2016.001)
The months that actually deliver
Counting only nights that were both stormy enough and dark enough, September, August and November came out ahead in Calgary. That is storm season and darkness overlapping — the equinoxes tend to be geomagnetically active, and the nights are already long by then.
Darkest nights of the coming year
A bright moon washes out a weak display as effectively as street lighting. These new moons fall inside the Calgary viewing season.
- 13 Aug 2026
- 11 Sep 2026
- 11 Oct 2026
- 09 Nov 2026
- 09 Dec 2026
- 07 Jan 2027
- 06 Feb 2027
Where it is close to a certainty
If you would rather plan a trip than wait for a storm, the nearest place with genuinely frequent aurora is Yellowknife, 1,268 km north in Canada.
| Calgary | Yellowknife | |
|---|---|---|
| Kp needed | 7 | 3 |
| Nights per year | 2.7 | 171.4 |
| Geomagnetic latitude | 57.6° | 68.6° |
Confirmed reports from this area
230 verified sightings were logged within 300 km of Calgary between 2015-01-01 and 2016-12-31. Rare is not the same as impossible.
Aurorasaurus verified positive reports
Where the horizon opens up near Calgary
The display sits low on the northern horizon, so what beats a better forecast is open ground facing that way. Height gets you above the town glow; water gives you an unbroken skyline. These are within a short drive of Calgary.
- St. George Island — island3.5 km east
- St. Patrick Island — island3.5 km east
- Edworthy Park — park5.1 km west-north-west
- Nose Hill Park — park7.2 km north-north-west
- Nose Hill — hill8.2 km north-north-west
- Spy Hill — hill15.5 km north-west
Places from GeoNames (CC BY 4.0)
What to do with the daylight
Aurora watching is a night job, and in winter that leaves a short, bright day to fill. Calgary keeps its fortified past above ground, at Fort Calgary, and for a day when the cloud sits low, Glenbow Museum and Heritage Park are indoors and near by.
Keep the daylight loose: the sky decides the evening, and the forecast can turn within a few hours.
Places from GeoNames (CC BY 4.0)
Where to stay
Staying central in Calgary is fine for everything except the aurora itself — you will still need to drive out. If seeing it matters more than convenience, base yourself on the edge of town facing your dark spot.
- Kensington Riverside Inn 0.2 km from the centre
- Execsuite 0.6 km from the centre
- Sheraton Suites Calgary Eau Cl 1.1 km from the centre
- Sheraton Suites Calgary Eau Claire 1.1 km from the centre
- Sheraton Calgary Suites Eau Claire Traditional One Bedroom Suite 1.1 km from the centre
- Calgary North Travelodge 2.8 km from the centre
Places from GeoNames (CC BY 4.0) — confirm before booking
The last nights it was visible here
Nights in the last decade when the storm was strong enough for Calgary and the sky was dark enough to show it.
| Date | Peak |
|---|---|
| 2026-03-20 | Kp 7.0 |
| 2026-01-20 | Kp 7.67 |
| 2026-01-19 | Kp 8.67 |
| 2025-11-12 | Kp 7.33 |
| 2025-11-11 | Kp 8.67 |
NOAA planetary Kp
Know when it is worth going outside
Revon watches the Calgary forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.
Common questions about the aurora borealis in Calgary
Can you see the aurora borealis from Calgary?
Yes. On the last 10.0 years of NOAA Kp records, Calgary had about 2.7 nights a year when the storm was strong enough and the sky dark enough at the same time.
What Kp index do you need to see the aurora borealis in Calgary?
Kp 7. Calgary sits at geomagnetic latitude 57.6°, and the auroral oval only reaches that far from the pole once activity hits Kp 7. Storms that size occur about 3.2 nights a year.
When is the best time of year to see the aurora borealis in Calgary?
September, August and November. Those months scored highest once both conditions are counted together: geomagnetic activity and enough hours of real darkness. From June to July the sky over Calgary never gets fully dark, so nothing is visible however strong the storm.
Where can you escape the light pollution near Calgary?
The centre of Calgary reads Bortle 8. The nearest sky at Bortle 4 is about 46 km east-north-east around Rocky View County. On a marginal night that drive matters more than the forecast does.
Where is the nearest place to Calgary with reliable aurora borealis?
Yellowknife, Canada — 1,268 km north. It needs only Kp 3 and averages 171.4 viable nights a year against 2.7 in Calgary.
Nearby towns
Forecasts for places within reach of Calgary.
- 🇨🇦 Cochrane - Canada31 km
- 🇨🇦 Red Deer - Canada137 km
- 🇨🇦 Lethbridge - Canada175 km
- 🇨🇦 Cranbrook - Canada210 km
- 🇨🇦 Camrose - Canada235 km
- 🇨🇦 Leduc - Canada249 km
- 🇨🇦 Medicine Hat - Canada266 km
- 🇨🇦 Spruce Grove - Canada276 km