Northern Ireland, United Kingdom
Northern lights in Coleraine
Answer
Tonight
Waiting on darkness
It is not civil-dark yet. The next dusk is listed below.
Observed 11:49 UTC, forecast 13:20 UTC, 91 min lead
Clock times in Europe/London
Storm level needed
Coleraine sits at 55.13N 6.67W in Northern Ireland, United Kingdom. The IGRF-14 centered dipole puts Coleraine at 57.9 degrees geomagnetic latitude, 2.8 degrees closer to the magnetic pole than its map latitude suggests. Coleraine sits at 57.9 degrees geomagnetic. By SWPC's rule the average oval edge is overhead at Kp 5, and aurora is usually visible on the northern horizon at G1 (Kp 5) or less.
"aurora is commonly visible at high latitudes (northern Michigan and Maine)"
The nearest other Glow towns are Ballymena (39 km), Derry (44 km), Antrim (55 km). Ballymena sits 0.3 degrees lower on the dipole and needs the same Kp.
Approximate: SWPC calls its Kp to latitude rule an average, and a centered dipole can differ by a degree from fuller field models. How the storm level is matched
The year in darkness
Every night of 2026 at Coleraine has some civil darkness; the shortest month sample still has 4.5 hours. Every evening of the year at Coleraine clears Glow's dark-season bar of 4 hours of civil night between 18:00 and 06:00. Coleraine's longest night of the year, Dec 17, has 15 h 12 min of civil night.
Solar midnight at Coleraine, when the sun is lowest, falls at 00:22 on local clocks on December 15 and 01:27 on June 15. That is 22 min after midnight in December and 1 h 27 min after midnight in June, the gap set by daylight saving and the equation of time. So at Coleraine the darkest hour sits near the middle of SWPC's 10 PM to 2 AM window in winter.
Month by month
| Month | Night | Civil | Cloud | Clear dark | |
|---|---|---|---|---|---|
| Jan | 14.6 h | 11.7 h | 87% | 1.9 h | |
| Feb | 12.9 h | 10.1 h | 83% | 2.2 hbest | |
| Mar | 10.8 h | 7.9 h | 82% | 1.9 h | |
| Apr | 8.4 h | 4.7 h | 78% | 1.8 h | |
| May | 6.0 h | 0.0 h | 76% | 1.4 h | |
| Jun | 4.5 h | 0.0 h | 82% | 0.8 h | |
| Jul | 5.2 h | 0.0 h | 84% | 0.8 h | |
| Aug | 7.5 h | 3.0 h | 84% | 1.2 h | |
| Sep | 9.9 h | 6.9 h | 83% | 1.7 h | |
| Oct | 12.2 h | 9.4 h | 84% | 2.0 h | |
| Nov | 14.2 h | 11.2 h | 87% | 1.8 h | |
| Dec | 15.2 h | 12.1 h | 87% | 2.0 h |
By the 15th-of-the-month sample, December is the darkest month at Coleraine with 15.2 hours of civil night and June the lightest at 4.5. Across the year Coleraine gets 3,689 hours of civil night. Astronomical night at Coleraine, the sun 18 degrees or more below the horizon, lasts 12.1 hours on December 15.
NASA POWER's 2001 to 2020 all-hours climatology puts mean cloud amount for the 1 degree cell around Coleraine at 83% across the year, from 76% in May to 87% in January. In the months with at least 4 hours of civil night Coleraine averages 83%, against a median of 77% for Glow towns in United Kingdom.
Multiplying civil night by the clear share of the sky gives February the best score, 2.2 hours, ahead of December at 2.0. Coleraine's equinox months score 1.9 in March and 1.7 in September, the weeks SWPC links with larger storms.
Kp history
From 1996 to 2025, the GFZ Potsdam record shows a 3-hour Kp of 5 or more, the level that puts the average oval edge over Coleraine, on 10% of days. At Coleraine's level the share runs from 5% in December to 14% in September, while storm days with Kp 5 or more made up 10%.
Share of UTC days in each calendar month whose highest 3-hour Kp reached Kp 5. Kp history by year
Moon, next 30 nights
Over the 30 nights from Oct 2, the new moon falls on Oct 10 and the full moon on Oct 26, in Europe/London dates. 15 of the 30 nights at Coleraine have at least 2 moon-free dark hours inside 10 PM to 2 AM, and Oct 6 has the most at 4 h. Tonight Coleraine has 11 h 14 min of civil night, 1 h 51 min of it with the moon down.
- 2
57% lit
1.9 h
- 3
46% lit
3.2 h
- 4
34% lit
4.8 h
- 5
24% lit
6.4 h
- 6
15% lit
8.0 h
- 7
8% lit
9.4 h
- 8
3% lit
10.9 h
- 9
1% lit
11.7 h
- 10
0% lit
11.8 h
- 11
2% lit
11.9 h
- 12
6% lit
11.9 h
- 13
11% lit
12.0 h
- 14
18% lit
12.1 h
- 15
26% lit
11.5 h
- 16
34% lit
10.7 h
- 17
43% lit
9.5 h
- 18
53% lit
8.3 h
- 19
62% lit
7.0 h
- 20
72% lit
5.7 h
- 21
80% lit
4.3 h
- 22
88% lit
3.0 h
- 23
94% lit
1.6 h
- 24
98% lit
0.2 h
- 25
100% lit
0.0 h
- 26
99% lit
0.0 h
- 27
95% lit
0.0 h
- 28
89% lit
0.0 h
- 29
81% lit
0.8 h
- 30
71% lit
2.1 h
- 31
60% lit
3.6 h
Each cell is the night that starts on that date. Hours are civil-dark time with the moon below the horizon; the green rule scales with them. Green outline: new moon. Bone outline: full moon.
Within United Kingdom
Among the 12 Glow towns in Northern Ireland, Coleraine ranks 1st by dipole latitude against a regional median of 57.3 degrees, the highest of them. Among the 105 Glow towns in United Kingdom, Coleraine ranks 25th by dipole latitude against a national median of 56.3 degrees; Isle of Lewis sits highest at 60.8. On December 15 Coleraine gets 15.2 hours of civil night, 25th longest of 105 in United Kingdom, where the median is 15.0.
Questions
- Can you see the northern lights in Coleraine?
- Coleraine sits at 57.9 degrees geomagnetic. By SWPC's rule the average oval edge is overhead at Kp 5, and aurora is usually visible on the northern horizon at G1 (Kp 5) or less. Clear, dark sky over Coleraine still decides it.
- When is it dark enough in Coleraine?
- Every night at Coleraine has civil darkness. Tonight has 11 h 14 min, and December 15 has 15.2 hours.
- What is the best month for aurora in Coleraine?
- February, by civil night at Coleraine times the clear share of the sky from NASA POWER's 2001 to 2020 average.
- How cloudy is Coleraine in the dark months?
- About 83% mean cloud amount over Coleraine in the months with at least 4 hours of civil night, from NASA POWER's 2001 to 2020 all-hours climatology.
- How often is activity high enough for Coleraine?
- A 3-hour Kp of 5 or more, the level that puts the average oval edge overhead, occurred on 10% of days from 1996 to 2025 in the GFZ Potsdam record.
Nearby and related
Nearest Glow towns
Coleraine by month
Region and comparisons