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Santiago de Compostela

42.880° N   8.546° W  ·  257 M
65 /100
PEAK
Worth setting up — 3 hours of workable sky from 00:00.
BEST WINDOW 00:00–03:00 · ASTRO DARK 00:00–06:00 · MOON 0%
Transparency
0.40
Seeing
0.94
Cloud
2%
Moon
0%

Good tonight

Hour by hour, local to Santiago de Compostela. Colour encodes the score and nothing else; every other measurement is luminance.

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
22
23
00
01
02
03
04
05
06
07
08
0
45
65
55
39
19
0
0
0
0
0
BEST WINDOW
Low cloud
0%
2%
6%
16%
33%
62%
100%
100%
100%
100%
90%
Mid cloud
0%
1%
0%
0%
0%
0%
0%
0%
0%
0%
0%
High cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Transparency
0.49
0.40
0.32
0.27
0.23
0.21
0.20
0.18
0.19
0.23
0.23
Seeing
0.84
0.88
0.92
0.94
0.94
0.88
0.84
0.83
0.82
0.86
0.89
Moon clear
down
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
22 Clouded out · 0/100
Starting from
100
Cloud
−0
Transparency
−21
Seeing
−3
Moonlight
−0
Darkness
−76
Score
0
CLOUD 0% LOW 0% MID 0% HIGH 0% SUN -3.9° MOON -1.1° / 0% WIND 4 TEMP 22°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.

What are you doing tonight?

The same forecast, weighted for the target. Planetary work barely cares about moonlight; long exposures die on high cloud a visual observer would never notice.

SET UP 22:30 · OBSERVE 23:00–03:00 · 4H · MEAN 49

Darkness and moonlight dominate. Faint fuzzies need a genuinely dark sky more than they need steady air.

220002040608
CLOUD RETURNS 03:00
SET UP 22:30 · OBSERVE 23:00–03:00 · 4H · MEAN 66

Seeing is everything and moonlight is irrelevant. Bright targets punch through twilight, so darkness barely counts.

220002040608
CLOUD RETURNS 03:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 22:30 · OBSERVE 23:00–03:00 · 4H · MEAN 47

Tolerates soft seeing, but high cloud wrecks a wide frame and moonlight raises the background everywhere.

220002040608
CLOUD RETURNS 03:00
SET UP 23:30 · OBSERVE 00:00–02:00 · 2H · MEAN 47

Needs conditions to hold still for hours. Sustained transparency matters more than any single good hour.

220002040608
ASTRONOMICAL DARK FROM 00:00CLOUD RETURNS 02:00
SET UP 22:30 · OBSERVE 23:00–03:00 · 4H · MEAN 51

Naked eye, whole sky. Total cloud and moonlight are the only things that count.

220002040608
CLOUD RETURNS 03:00
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The next week of nights

Tonight · 12 Aug
65
Good
MOON 0%
00:00–03:00
Tomorrow · 13 Aug
25
Poor
MOON 2%
Friday · 14 Aug
63
Good
MOON 6%
00:00–05:00
Saturday · 15 Aug
69
Good
MOON 13%
02:00–03:00
Sunday · 16 Aug
49
Fair
MOON 21%
02:00–03:00
Monday · 17 Aug
44
Fair
MOON 30%
02:00–03:00
Tuesday · 18 Aug
70
Good
MOON 39%
02:00–03:00
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Nearby locations

About this forecast

Conditions for Santiago de Compostela, Spain 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 →