Northern lights Ullapool tonight
Ullapool sits at 58°N magnetic latitude on Loch Broom in Wester Ross - one of the highest-latitude accessible towns on the UK mainland. Kp 3 is enough for aurora on a clear night from the dark sky positions along the loch and on the Coigach peninsula. The Assynt landscape to the north gives open Bortle Class 2 moorland within 25 minutes. The ferry to Lewis and the Outer Hebrides leaves from the town pier, adding island dark sky options to the same base.
Aurora visibility - Ullapool
Unlikely tonight
Kp 1 is well below the Kp 3 threshold needed for aurora to be visible from Ullapool.
Current Kp
1
of 9
7-day outlook for Ullapool
Today
21 May
Tomorrow
22 May
Sat
23 May
Sun
24 May
Mon
25 May
Tue
26 May
Wed
27 May
Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.
What Kp is needed here?
Ullapool sits at a magnetic latitude of approximately 58°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 3 before the auroral oval expands far enough south to be visible from here.
At Kp 3, visibility is possible from Ullapool 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 Ullapool
Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.
Loch Broom north shore
Get directions ↗The A835 north of Ullapool follows the north shore of Loch Broom for 8 km before turning inland toward the Strath More valley. The lochside pull-ins on the north shore give a west and northwest view across the open sea loch toward Beinn Ghobhlach (635 m) on the far shore. Ullapool's lights are behind to the south and southeast. The road is straight and gives several lay-by options; the first clear one north of the village is 5 km from the harbour. Bortle Class 2 from the water's edge. On calm nights the loch surface mirrors any overhead activity, giving a reflected arc on the water as well as the sky. The road is well-maintained year-round.
Achnahaird Bay
Get directions ↗Achnahaird Bay is a remote Atlantic beach on the Coigach peninsula, reached from Achiltibuie via the single-track Polbain road. The bay faces northwest with an open North Atlantic horizon and no artificial light in any direction except a faint glow from Ullapool to the southeast. The beach is wide, flat sand with dunes at the back - shelter from the wind without blocking the sky. Bortle Class 2 throughout. The drive from Ullapool takes 30 minutes via the A835 and the Achiltibuie turn-off; the single-track road requires care after dark. The bay is accessible year-round on foot from the small car park at the end of the Achnahaird road.
Suilven and Stac Pollaidh approach road
Get directions ↗The Inverpolly road north from the A835 at Drumrunie gives access to the base of Suilven and Stac Pollaidh. The road runs across open Lewisian gneiss moorland with lochans and no tree cover. The sky is open in every direction and the moorland elevation (100-200 m) adds to the dark sky quality. Stac Pollaidh car park on the Inverpolly road is a designated National Nature Reserve access point and is free. Bortle Class 2 throughout the Inverpolly area. The moorland character of the Assynt landscape - flat rock, open water, and big sky - gives among the best Aurora photography settings in mainland Scotland.
Best time to see the northern lights in Ullapool
Ullapool'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.
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 Ullapool'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.
Related pages
Northern Lights Scotland Tonight
Scotland-wide aurora forecast.
Northern Lights Inverness Tonight
Inverness - 60 km southeast, the nearest city and transport hub.
Northern Lights Outer Hebrides Tonight
Outer Hebrides - Lewis and Harris, Bortle Class 1-2, 2h45m ferry from Ullapool.
Northern Lights Isle of Skye Tonight
Isle of Skye - similar latitude, Trotternish and Waternish dark sky.
What Is the Kp Index?
How the Kp scale determines aurora visibility at your latitude.
Common questions
Aurora in Ullapool - Loch Broom, Assynt, Outer Hebrides ferry, and what to expect at 58°N.