GoodSeeing
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Wembesi

-29.049° S   29.782° E  ·  1254 M
35 /100
PEAK
Marginal, but there is a 1 hour gap from 00:00.
BEST WINDOW 00:00–01:00 · ASTRO DARK 19:00–06:00 · MOON 0%
Transparency
0.37
Seeing
1.00
Cloud
31%
Moon
0%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
19
20
21
22
23
00
01
02
03
04
05
06
07
22
24
23
25
33
35
2
0
0
0
7
9
0
BEST WINDOW
Low cloud
36%
41%
51%
56%
48%
38%
92%
100%
100%
100%
90%
31%
60%
Mid cloud
58%
47%
38%
23%
10%
20%
74%
69%
5%
1%
1%
2%
2%
High cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Transparency
0.37
0.32
0.32
0.32
0.29
0.24
0.24
0.24
0.25
0.30
0.34
0.29
0.19
Seeing
0.82
0.82
0.87
0.87
0.89
0.97
1.00
0.98
0.96
0.98
1.00
1.00
0.98
Moon clear
down
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
19 Poor · 22/100
Starting from
100
Cloud
−69
Transparency
−8
Seeing
−1
Moonlight
−0
Darkness
−0
Score
22
CLOUD 64% LOW 36% MID 58% HIGH 0% SUN -18.8° MOON -18.1° / 0% WIND 4 TEMP 7°
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 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.

19212301030507
CLOUD RETURNS 01:00
SET UP 22:30 · OBSERVE 23:00–01:00 · 2H · MEAN 41

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

19212301030507
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.

19212301030507
CONDITIONS STAY BELOW THE USABLE THRESHOLD
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

19212301030507
CONDITIONS STAY BELOW THE USABLE THRESHOLD
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

19212301030507
CONDITIONS STAY BELOW THE USABLE THRESHOLD
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The next week of nights

Tonight · 12 Aug
35
Fair
MOON 0%
00:00–01:00
Tomorrow · 13 Aug
81
Excellent
MOON 2%
19:00–00:00
Friday · 14 Aug
89
Excellent
MOON 6%
19:00–06:00
Saturday · 15 Aug
92
Excellent
MOON 13%
20:00–21:00
Sunday · 16 Aug
95
Excellent
MOON 21%
20:00–21:00
Monday · 17 Aug
88
Excellent
MOON 30%
20:00–21:00
Tuesday · 18 Aug
37
Fair
MOON 39%
20:00–21:00
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Nearby locations

About this forecast

Conditions for Wembesi, South Africa 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 →