Nelson
53.833° N
2.200° W · 170 M
80
/100
PEAK
PEAK
A genuinely good night — 4 hours of clear, dark sky from 00:00.
BEST WINDOW 00:00–04:00 · ASTRO DARK 00:00–03:00 · MOON 0%
Transparency
0.82
Seeing
0.91
Cloud
0%
Moon
0%
Excellent tonight
Hour by hour, local to Nelson. Colour encodes the score and nothing else; every other measurement is luminance.
Sky state
Lighter = daylight and twilight ·
unshaded = astronomical dark
Score
21
22
23
00
01
02
03
04
05
06
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
3%
5%
6%
12%
19%
9%
6%
1%
0%
0%
High cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Transparency
0.72
0.75
0.76
0.78
0.82
0.81
0.76
0.72
0.68
0.64
Seeing
0.92
0.89
0.91
0.87
0.80
0.80
0.84
0.87
0.87
0.89
Moon clear
down
down
down
down
down
down
down
down
down
down
Inspect
Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.
Why this hour scored what it did
21
Clouded out · 0/100
Starting from
100
Cloud
−3
Transparency
−11
Seeing
−2
Moonlight
−0
Darkness
−84
Score
0
CLOUD 3%
LOW 0%
MID 3%
HIGH 0%
SUN -2.7°
MOON -0.3° / 0%
WIND 3
TEMP 22°
22
Poor · 26/100
Starting from
100
Cloud
−4
Transparency
−10
Seeing
−2
Moonlight
−0
Darkness
−57
Score
26
CLOUD 5%
LOW 0%
MID 5%
HIGH 0%
SUN -9.8°
MOON -8.3° / 0%
WIND 3
TEMP 22°
23
Good · 66/100
Starting from
100
Cloud
−6
Transparency
−9
Seeing
−2
Moonlight
−0
Darkness
−17
Score
66
CLOUD 6%
LOW 0%
MID 6%
HIGH 0%
SUN -15.5°
MOON -14.4° / 0%
WIND 3
TEMP 22°
00
Excellent · 79/100
Starting from
100
Cloud
−11
Transparency
−8
Seeing
−3
Moonlight
−0
Darkness
−0
Score
79
CLOUD 12%
LOW 0%
MID 12%
HIGH 0%
SUN -19.5°
MOON -19.0° / 0%
WIND 3
TEMP 22°
01
Good · 73/100
Starting from
100
Cloud
−17
Transparency
−6
Seeing
−4
Moonlight
−0
Darkness
−0
Score
73
CLOUD 19%
LOW 0%
MID 19%
HIGH 0%
SUN -21.2°
MOON -21.6° / 0%
WIND 4
TEMP 22°
02
Excellent · 80/100
Starting from
100
Cloud
−8
Transparency
−7
Seeing
−4
Moonlight
−0
Darkness
−0
Score
80
CLOUD 9%
LOW 0%
MID 9%
HIGH 0%
SUN -20.6°
MOON -22.0° / 0%
WIND 4
TEMP 22°
03
Excellent · 80/100
Starting from
100
Cloud
−6
Transparency
−9
Seeing
−3
Moonlight
−0
Darkness
−2
Score
80
CLOUD 6%
LOW 0%
MID 6%
HIGH 0%
SUN -17.7°
MOON -20.2° / 0%
WIND 4
TEMP 21°
04
Fair · 48/100
Starting from
100
Cloud
−1
Transparency
−11
Seeing
−3
Moonlight
−0
Darkness
−37
Score
48
CLOUD 1%
LOW 0%
MID 1%
HIGH 0%
SUN -12.8°
MOON -16.4° / 0%
WIND 3
TEMP 20°
05
Clouded out · 2/100
Starting from
100
Cloud
−0
Transparency
−13
Seeing
−3
Moonlight
−0
Darkness
−83
Score
2
CLOUD 0%
LOW 0%
MID 0%
HIGH 0%
SUN -6.2°
MOON -10.9° / 0%
WIND 3
TEMP 20°
06
Clouded out · 0/100
Starting from
100
Cloud
−0
Transparency
−15
Seeing
−2
Moonlight
−0
Darkness
−83
Score
0
CLOUD 0%
LOW 0%
MID 0%
HIGH 0%
SUN 1.4°
MOON -3.8° / 0%
WIND 3
TEMP 19°
Excellent 75+
Good 55+
Fair 35+
Poor 15+
Not worth it
Seeing is estimated from surface wind — see
how we score.
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The next week of nights
Tonight · 12 Aug
80
Excellent
MOON 0%
00:00–04:00
00:00–04:00
Tomorrow · 13 Aug
44
Fair
MOON 2%
02:00–03:00
02:00–03:00
Friday · 14 Aug
61
Good
MOON 6%
02:00–04:00
02:00–04:00
Saturday · 15 Aug
71
Good
MOON 13%
01:00–02:00
01:00–02:00
Sunday · 16 Aug
41
Fair
MOON 21%
01:00–02:00
01:00–02:00
Monday · 17 Aug
2
Clouded out
MOON 30%
Tuesday · 18 Aug
0
Clouded out
MOON 39%
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Nearby locations
About this forecast
Conditions for Nelson, United Kingdom are computed from the MET Norway forecast model for these exact coordinates, combined with sun and moon positions we calculate directly. The score weighs cloud cover by layer, atmospheric transparency, estimated seeing, moonlight and how dark the sky actually gets. Read the full method →