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Sarrià-Sant Gervasi

41.401° N   2.139° E  ·  124 M
75 /100
PEAK
A genuinely good night — 7 hours of clear, dark sky from 23:00.
BEST WINDOW 23:00–06:00 · ASTRO DARK 23:00–06:00 · MOON 0%
Transparency
0.45
Seeing
1.00
Cloud
0%
Moon
0%

Excellent tonight

Hour by hour, local to Sarrià-Sant Gervasi. 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
07
0
35
75
72
73
73
72
72
70
28
0
BEST WINDOW
Low cloud
0%
0%
0%
1%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
2%
2%
1%
1%
0%
0%
1%
0%
0%
0%
0%
High cloud
11%
6%
2%
2%
0%
0%
0%
0%
6%
2%
0%
Transparency
0.52
0.45
0.40
0.36
0.34
0.33
0.31
0.30
0.32
0.32
0.33
Seeing
1.00
1.00
1.00
1.00
1.00
1.00
1.00
0.99
0.99
1.00
1.00
Moon clear
0%
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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
−8
Transparency
−18
Seeing
−0
Moonlight
−0
Darkness
−74
Score
0
CLOUD 13% LOW 0% MID 2% HIGH 11% SUN -1.5° MOON 0.9° / 0% WIND 2 TEMP 28°
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 23:00–06:00 · 7H · MEAN 72

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

212301030507
ASTRONOMICAL DARK FROM 23:00TWILIGHT BEGINS 06:00
SET UP 21:30 · OBSERVE 22:00–07:00 · 9H · MEAN 83

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

212301030507
TWILIGHT BEGINS 07:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 22:30 · OBSERVE 23:00–06:00 · 7H · MEAN 68

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

212301030507
ASTRONOMICAL DARK FROM 23:00TWILIGHT BEGINS 06:00
SET UP 22:30 · OBSERVE 23:00–06:00 · 7H · MEAN 59

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

212301030507
ASTRONOMICAL DARK FROM 23:00TWILIGHT BEGINS 06:00
SET UP 22:30 · OBSERVE 23:00–06:00 · 7H · MEAN 77

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

212301030507
ASTRONOMICAL DARK FROM 23:00TWILIGHT BEGINS 06:00
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The next week of nights

Tonight · 12 Aug
75
Excellent
MOON 0%
23:00–06:00
Tomorrow · 13 Aug
89
Excellent
MOON 2%
23:00–06:00
Friday · 14 Aug
82
Excellent
MOON 6%
23:00–06:00
Saturday · 15 Aug
45
Fair
MOON 13%
02:00–03:00
Sunday · 16 Aug
30
Poor
MOON 21%
Monday · 17 Aug
53
Fair
MOON 30%
02:00–03:00
Tuesday · 18 Aug
71
Good
MOON 39%
02:00–03:00
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Nearby locations

About this forecast

Conditions for Sarrià-Sant Gervasi, 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 →