GoodSeeing
Home › Locations › Wang Saphung

Wang Saphung

17.301° N   101.769° E  ·  254 M
50 /100
PEAK
Marginal, but there is a 3 hours gap from 00:00.
BEST WINDOW 00:00–03:00 · ASTRO DARK 00:00–05:00 · MOON 0%
Transparency
0.33
Seeing
0.98
Cloud
40%
Moon
0%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
00
01
02
03
04
05
06
50
47
46
27
19
16
0
BEST WINDOW
Low cloud
2%
3%
4%
6%
7%
6%
6%
Mid cloud
14%
18%
27%
47%
56%
31%
31%
High cloud
29%
30%
15%
48%
77%
85%
82%
Transparency
0.33
0.31
0.30
0.28
0.28
0.27
0.25
Seeing
0.81
0.78
0.79
0.84
0.94
0.98
0.98
Moon clear
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
00 Fair · 50/100
Starting from
100
Cloud
−28
Transparency
−19
Seeing
−2
Moonlight
−0
Darkness
−0
Score
50
CLOUD 40% LOW 2% MID 14% HIGH 29% SUN -57.4° MOON -56.3° / 0% WIND 4 TEMP 25°
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
Why thin high cloud ruins long exposures

Cirrus you can barely see will halo your bright stars, lift your background and vary between frames. Visual observers shrug it off. Long exposures integrate it, so it accumulates.

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 00:00–03:00 · 3H · MEAN 48

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

00020406
CLOUD RETURNS 03:00
SET UP 23:30 · OBSERVE 00:00–03:00 · 3H · MEAN 53

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

00020406
CLOUD RETURNS 03:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 23:30 · OBSERVE 00:00–03:00 · 3H · MEAN 43

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

00020406
CLOUD RETURNS 03:00
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

00020406
CONDITIONS STAY BELOW THE USABLE THRESHOLD
SET UP 23:30 · OBSERVE 00:00–03:00 · 3H · MEAN 48

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

00020406
CLOUD RETURNS 03:00
Advertisement
Reserved

The next week of nights

Tonight · 12 Aug
50
Fair
MOON 0%
00:00–03:00
Tomorrow · 13 Aug
38
Fair
MOON 1%
02:00–03:00
Friday · 14 Aug
28
Poor
MOON 5%
Saturday · 15 Aug
16
Poor
MOON 10%
Sunday · 16 Aug
20
Poor
MOON 19%
Monday · 17 Aug
29
Poor
MOON 28%
Tuesday · 18 Aug
25
Poor
MOON 37%
Advertisement
Reserved

Nearby locations

About this forecast

Conditions for Wang Saphung, Thailand 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 →