All locations Scotland Perth

Northern lights Perth tonight

Perth sits at 56°N magnetic latitude at the southern end of the Perthshire Highlands corridor. Kp 4 is the threshold for aurora from a dark site. Kinnoull Hill east of the city gives a quick northern view 10 minutes from the centre; Loch Tummel and Glen Lyon to the north reach Bortle Class 2 in under an hour. The A9 north from Perth leads directly into the darker, higher-latitude Highland zone.

Aurora visibility - Perth

Unlikely tonight

Kp 1 is well below the Kp 4 threshold needed for aurora to be visible from Perth.

Current Kp

1

of 9

Threshold for Perth: Kp 4 Magnetic latitude: ~56°N Updated: 21 May, 17:49 UTC
↓ Bz nT Solar wind km/s Density p/cm³
Conditions right now: Kp + Bz + solar wind + cloud + moon

7-day outlook for Perth

Today

21 May

Quiet

Tomorrow

22 May

Quiet

Sat

23 May

Quiet

Sun

24 May

Quiet

Mon

25 May

Quiet

Tue

26 May

Quiet

Wed

27 May

Quiet

Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.

What Kp is needed here?

Perth sits at a magnetic latitude of approximately 56°N. The Kp index - a global measure of geomagnetic activity on a scale from 0 (quiet) to 9 (extreme storm), updated every 3 hours - needs to reach Kp 4 before the auroral oval expands far enough south to be visible from here.

At Kp 4, visibility is possible from Perth but skies need to be clear and dark. Cloud cover and light pollution remain the main obstacles even when Kp is high enough.

Best dark sky sites near Perth

Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.

Kinnoull Hill

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Bortle Class 3 - Rural sky 3 km from Perth city centre - approximately 10 minute drive

Kinnoull Hill rises 222 m directly east of Perth above the Tay gorge. The summit and the Coronation Road ridge give clear northward views across the Tay flood plain toward Strathearn. Perth's light dome is behind to the west, and the valley ahead is largely unlit. The Kinnoull Hill Woodland Park paths to the summit are signed from the Jubilee car park on Corsiehill Road; the walk takes 20 minutes on a clear path. The cliff-top viewpoints give the best northern arc visibility, but the upper ridge south of the tower also has open sky. Bortle Class 3 from the summit. A good first-attempt site before driving further north.

Loch Tummel - Queen's View

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Bortle Class 2 - Excellent dark sky 45 km from Perth - approximately 50 minute drive

Queen's View is a National Trust for Scotland car park on the south shore of Loch Tummel, 8 km west of Pitlochry on the B8019. The loch opens to the northwest through the Tay Forest Park, with no settlement visible in that direction. The Schiehallion massif blocks the southwest but the north and northwest horizons are open across the water. The NTS visitor centre closes at dusk; the car park remains accessible. Bortle Class 2 throughout the loch corridor. The position is 50 minutes from Perth via the A9 and Pitlochry - a straightforward drive that avoids any significant town once past Pitlochry.

Glen Lyon

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Bortle Class 2 - Excellent dark sky 65 km from Perth - approximately 1 hour drive

Glen Lyon runs 50 km west into the Breadalbane hills, reached from Aberfeldy via the B846. The glen is Scotland's longest enclosed glen and has no large settlement beyond Fortingall at its eastern entrance. The valley floor is flat and grassy with the River Lyon running through it; any pull-in along the single-track road gives northward and overhead views with full Bortle Class 2 conditions. The glen's east-west orientation means the northern hillside forms a background rather than blocking the horizon - looking straight up gives the clearest sky access. Allow 1 hour from Perth; the road is single-track west of Bridge of Balgie, so drive carefully after dark.

Best time to see the northern lights in Perth

Perth's aurora season runs from late September through to March, when nights are long enough for truly dark skies. The equinox months, September and March, bring a natural boost in geomagnetic activity, making them statistically the best of the season. Summer months bring too much twilight for aurora to be visible at this latitude.

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Activity peaks around the September and March equinoxes, when Earth's magnetic field geometry is most favourable for coupling with the solar wind. Events during these two windows tend to produce the strongest displays of the year for observers at Perth's latitude.

April through August brings persistent astronomical twilight that washes out aurora completely. Even strong events (Kp 6+) remain invisible during this period because the sky never gets dark enough.

Common questions

Aurora in Perth and Perthshire - dark sky sites, Kp threshold, and the Highlands corridor to the north.

What Kp is needed for northern lights in Perth?
Perth sits at approximately 56°N magnetic latitude, putting the Kp threshold at around Kp 4 for aurora to be reliably visible from a dark site. The Kp index - a global measure of geomagnetic activity on a scale from 0 (quiet) to 9 (extreme storm), updated every 3 hours - needs to reach at least Kp 4 for the auroral oval to extend this far south. From Kinnoull Hill with its modest dark sky, Kp 4-5 is needed; from Loch Tummel or Glen Lyon at Bortle Class 2, Kp 4 can produce a visible arc.
Is Perth a good base for aurora watching in Perthshire?
Perth is the most accessible entry point to the Perthshire dark sky corridor running north along the A9 through Pitlochry to the Cairngorms. From Perth, Kinnoull Hill is 10 minutes away for a quick check on the sky; Loch Tummel is 50 minutes for a serious dark sky position; the Cairngorms plateau is reachable in 90 minutes via the A9. The city itself has moderate light pollution, but the Tay valley immediately north of the city thins out quickly. Staying in Perth with a hire car gives access to all of these without committing to an expensive Highland hotel.
How does Perth compare to Pitlochry for aurora?
Pitlochry sits 40 km north of Perth at 57°N magnetic latitude, reducing the Kp threshold from Kp 4 to around Kp 3-4. The difference in frequency is meaningful over a full season - Pitlochry sees aurora perhaps 30-40% more often than Perth during moderate activity. The dark sky sites around Pitlochry (Queen's View, Ben Vrackie, the Pass of Killiecrankie) are also closer from Pitlochry than from Perth. If aurora watching is the primary goal of a trip rather than a secondary activity, Pitlochry is the better base.
Can you see the northern lights from Perth city centre?
Only during a significant storm (Kp 6+). Perth has enough ambient light from the city centre and the retail areas to suppress faint aurora. From South Inch or North Inch parks on the river, the northern sky is somewhat less polluted, but these are not dark sites. Kinnoull Hill above the city gives a noticeably darker northern arc and is the first destination worth checking when a forecast looks promising.
What is the aurora season in Perth?
The practical aurora season runs from September to April. By mid-May, the nights are shortening toward the brief Scottish summer twilight that suppresses complete darkness. The equinox months - September and March - see elevated geomagnetic activity on average, though individual storms can occur at any point in the season. November to January gives the longest clear-sky windows before dawn, which is useful when chasing activity that peaks after midnight.

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