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Arucas

28.120° N   15.523° W  ·  280 M
45 /100
PEAK
Marginal, but there is a 2 hours gap from 04:00.
BEST WINDOW 04:00–06:00 · ASTRO DARK 23:00–07:00 · MOON 0%
Transparency
0.34
Seeing
0.54
Cloud
27%
Moon
0%

Fair tonight

Hour by hour, local to Arucas. 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
08
0
25
20
23
33
40
32
45
44
34
4
0
BEST WINDOW
Low cloud
26%
54%
68%
63%
46%
34%
47%
27%
31%
46%
40%
33%
Mid cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
High cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Transparency
0.38
0.34
0.30
0.29
0.30
0.29
0.29
0.32
0.33
0.33
0.33
0.35
Seeing
0.46
0.46
0.45
0.49
0.51
0.54
0.54
0.52
0.52
0.51
0.52
0.52
Moon clear
down
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
21 Clouded out · 0/100
Starting from
100
Cloud
−26
Transparency
−18
Seeing
−8
Moonlight
−0
Darkness
−48
Score
0
CLOUD 26% LOW 26% MID 0% HIGH 0% SUN -4.2° MOON -0.9° / 0% WIND 7 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 00:30 · OBSERVE 01:00–07:00 · 6H · MEAN 41

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

212301030507
CLOUD BREAKS 01:00TWILIGHT BEGINS 07:00
SET UP 03:30 · OBSERVE 04:00–07:00 · 3H · MEAN 42

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

212301030507
CLOUD BREAKS 04:00TWILIGHT BEGINS 07:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 03:30 · OBSERVE 04:00–07:00 · 3H · MEAN 43

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

212301030507
CLOUD BREAKS 04:00TWILIGHT BEGINS 07:00
SET UP 03:30 · OBSERVE 04:00–05:00 · 1H · MEAN 35

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

212301030507
CLOUD BREAKS 04:00
SET UP 03:30 · OBSERVE 04:00–07:00 · 3H · MEAN 45

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

212301030507
CLOUD BREAKS 04:00TWILIGHT BEGINS 07:00
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The next week of nights

Tonight · 12 Aug
45
Fair
MOON 0%
04:00–06:00
Tomorrow · 13 Aug
49
Fair
MOON 2%
22:00–07:00
Friday · 14 Aug
37
Fair
MOON 6%
22:00–23:00
Saturday · 15 Aug
14
Clouded out
MOON 13%
Sunday · 16 Aug
20
Poor
MOON 21%
Monday · 17 Aug
28
Poor
MOON 30%
Tuesday · 18 Aug
64
Good
MOON 39%
01:00–02:00
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Nearby locations

About this forecast

Conditions for Arucas, 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 →