GoodSeeing
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Liberia

10.635° N   85.438° W  ·  148 M
47 /100
PEAK
Marginal, but there is a 8 hours gap from 21:00.
BEST WINDOW 21:00–05:00 · ASTRO DARK 20:00–05:00 · MOON 1%
Transparency
0.59
Seeing
0.87
Cloud
31%
Moon
1%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
18
19
20
21
22
23
00
01
02
03
04
05
06
0
21
30
39
44
47
37
46
43
45
44
11
0
BEST WINDOW
Low cloud
16%
18%
34%
31%
33%
29%
41%
34%
41%
40%
42%
31%
46%
Mid cloud
3%
2%
3%
6%
2%
5%
1%
2%
1%
1%
1%
0%
11%
High cloud
94%
95%
70%
38%
22%
18%
33%
15%
7%
5%
1%
0%
1%
Transparency
0.63
0.59
0.56
0.53
0.52
0.51
0.52
0.52
0.52
0.50
0.50
0.50
0.53
Seeing
0.71
0.72
0.69
0.73
0.77
0.81
0.81
0.79
0.82
0.86
0.87
0.83
0.78
Moon clear
0%
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
18 Clouded out · 0/100
Starting from
100
Cloud
−60
Transparency
−6
Seeing
−2
Moonlight
−0
Darkness
−31
Score
0
CLOUD 95% LOW 16% MID 3% HIGH 94% SUN -0.4° MOON 4.4° / 0% WIND 5 TEMP 29°
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
What the GoodSeeing score actually measures

One number from 0 to 100 per hour, combining cloud, transparency, seeing, moonlight and darkness. Cloud gates everything else — no amount of steady, dark air rescues an overcast sky.

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 20:30 · OBSERVE 21:00–05:00 · 8H · MEAN 44

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

18202200020406
HIGH CLOUD CLEARS 21:00TWILIGHT BEGINS 05:00
SET UP 20:30 · OBSERVE 21:00–06:00 · 9H · MEAN 45

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

18202200020406
HIGH CLOUD CLEARS 21:00CLOUD RETURNS 06:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 00:30 · OBSERVE 01:00–05:00 · 4H · MEAN 43

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

18202200020406
HIGH CLOUD CLEARS 01:00TWILIGHT BEGINS 05:00
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

18202200020406
CONDITIONS STAY BELOW THE USABLE THRESHOLD
SET UP 00:30 · OBSERVE 01:00–05:00 · 4H · MEAN 43

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

18202200020406
HIGH CLOUD CLEARS 01:00TWILIGHT BEGINS 05:00
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The next week of nights

Tonight · 12 Aug
47
Fair
MOON 0%
21:00–05:00
Tomorrow · 13 Aug
63
Good
MOON 3%
20:00–01:00
Friday · 14 Aug
62
Good
MOON 7%
20:00–23:00
Saturday · 15 Aug
16
Poor
MOON 15%
Sunday · 16 Aug
15
Poor
MOON 23%
Monday · 17 Aug
28
Poor
MOON 32%
Tuesday · 18 Aug
39
Fair
MOON 42%
00:00–01:00
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Nearby locations

About this forecast

Conditions for Liberia, Costa Rica 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 →