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Beni Saf

35.301° N   1.382° W  ·  35 M
38 /100
PEAK
Marginal, but there is a 1 hour gap from 00:00.
BEST WINDOW 00:00–01:00 · ASTRO DARK 22:00–05:00 · MOON 0%
Transparency
0.28
Seeing
1.00
Cloud
69%
Moon
0%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
20
21
22
23
00
01
02
03
04
05
06
0
9
25
30
38
25
23
20
20
22
0
BEST WINDOW
Low cloud
46%
29%
13%
9%
9%
17%
33%
37%
33%
25%
34%
Mid cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
High cloud
96%
98%
91%
88%
66%
92%
76%
82%
96%
77%
77%
Transparency
0.21
0.24
0.28
0.28
0.26
0.23
0.23
0.22
0.22
0.20
0.19
Seeing
0.99
0.96
0.83
0.95
0.99
1.00
1.00
1.00
1.00
1.00
1.00
Moon clear
0%
down
down
down
down
down
down
down
down
down
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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
20 Clouded out · 0/100
Starting from
100
Cloud
−86
Transparency
−4
Seeing
−0
Moonlight
−0
Darkness
−10
Score
0
CLOUD 98% LOW 46% MID 0% HIGH 96% SUN -1.1° MOON 1.4° / 0% WIND 2 TEMP 26°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.
Tonight's limiting factor
When a clear gap is worth driving for

Ask how long the gap is relative to your setup time and your exposure length. A two-hour gap is a real session for a visual observer and close to worthless for someone doing four-minute subs on a target that needs three hours.

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 23:30 · OBSERVE 00:00–01:00 · 1H · MEAN 35

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

202200020406
HIGH CLOUD CLEARS 00:00CLOUD RETURNS 01:00
SET UP 22:30 · OBSERVE 23:00–01:00 · 2H · MEAN 40

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

202200020406
CLOUD RETURNS 01:00MOONLIGHT IGNORED FOR THIS TARGET
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

202200020406
CLOUD NEVER DROPS BELOW 69%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

202200020406
CLOUD NEVER DROPS BELOW 69%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

202200020406
CLOUD NEVER DROPS BELOW 69%
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The next week of nights

Tonight · 12 Aug
38
Fair
MOON 0%
00:00–01:00
Tomorrow · 13 Aug
72
Good
MOON 2%
22:00–06:00
Friday · 14 Aug
75
Excellent
MOON 6%
22:00–05:00
Saturday · 15 Aug
35
Fair
MOON 13%
01:00–02:00
Sunday · 16 Aug
37
Fair
MOON 21%
01:00–02:00
Monday · 17 Aug
42
Fair
MOON 30%
01:00–02:00
Tuesday · 18 Aug
42
Fair
MOON 39%
01:00–02:00
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Nearby locations

About this forecast

Conditions for Beni Saf, Algeria 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 →