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Shuizhai

23.930° N   115.765° E  ·  106 M
70 /100
PEAK
Worth setting up — 4 hours of workable sky from 01:00.
BEST WINDOW 01:00–05:00 · ASTRO DARK 01:00–05:00 · MOON 0%
Transparency
0.38
Seeing
0.92
Cloud
9%
Moon
0%

Good tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
01
02
03
04
05
06
49
35
48
70
33
0
BEST WINDOW
Low cloud
6%
3%
1%
1%
2%
2%
Mid cloud
2%
0%
0%
0%
0%
0%
High cloud
48%
91%
60%
8%
11%
9%
Transparency
0.38
0.37
0.38
0.38
0.37
0.34
Seeing
0.86
0.87
0.87
0.90
0.92
0.95
Moon clear
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
01 Fair · 49/100
Starting from
100
Cloud
−32
Transparency
−17
Seeing
−2
Moonlight
−0
Darkness
−0
Score
49
CLOUD 52% LOW 6% MID 2% HIGH 48% SUN -50.0° MOON -49.4° / 0% WIND 3 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 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 58

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

010305
HIGH CLOUD CLEARS 03:00TWILIGHT BEGINS 05:00
SET UP 00:30 · OBSERVE 01:00–06:00 · 5H · MEAN 58

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

010305
TWILIGHT BEGINS 06:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 52

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

010305
HIGH CLOUD CLEARS 03:00TWILIGHT BEGINS 05:00
SET UP 03:30 · OBSERVE 04:00–05:00 · 1H · MEAN 57

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

010305
HIGH CLOUD CLEARS 04:00TWILIGHT BEGINS 05:00
SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 60

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

010305
HIGH CLOUD CLEARS 03:00TWILIGHT BEGINS 05:00
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The next week of nights

Tonight · 12 Aug
70
Good
MOON 0%
01:00–05:00
Tomorrow · 13 Aug
40
Fair
MOON 1%
21:00–23:00
Friday · 14 Aug
42
Fair
MOON 5%
01:00–02:00
Saturday · 15 Aug
29
Poor
MOON 10%
Sunday · 16 Aug
15
Poor
MOON 19%
Monday · 17 Aug
27
Poor
MOON 28%
Tuesday · 18 Aug
25
Poor
MOON 37%
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Nearby locations

About this forecast

Conditions for Shuizhai, China 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 →