GoodSeeing
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Madang

-5.221° S   145.787° E  ·  4 M
45 /100
PEAK
Marginal, but there is a 1 hour gap from 04:00.
BEST WINDOW 04:00–05:00 · ASTRO DARK 04:00–06:00 · MOON 0%
Transparency
0.23
Seeing
1.00
Cloud
53%
Moon
0%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
04
05
06
07
45
22
2
0
BEST WINDOW
Low cloud
6%
29%
45%
63%
Mid cloud
1%
11%
12%
2%
High cloud
49%
90%
9%
7%
Transparency
0.19
0.20
0.23
0.24
Seeing
1.00
1.00
1.00
1.00
Moon clear
down
down
down
0%
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
04 Fair · 45/100
Starting from
100
Cloud
−33
Transparency
−22
Seeing
−0
Moonlight
−0
Darkness
−0
Score
45
CLOUD 53% LOW 6% MID 1% HIGH 49% SUN -35.7° MOON -37.3° / 0% WIND 2 TEMP 24°
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 03:30 · OBSERVE 04:00–05:00 · 1H · MEAN 43

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

0406
CLOUD RETURNS 05:00
SET UP 03:30 · OBSERVE 04:00–05:00 · 1H · MEAN 55

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

0406
CLOUD RETURNS 05:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 03:30 · OBSERVE 04:00–05:00 · 1H · MEAN 36

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

0406
CLOUD RETURNS 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.

0406
CLOUD NEVER DROPS BELOW 53%
SET UP 03:30 · OBSERVE 04:00–05:00 · 1H · MEAN 42

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

0406
CLOUD RETURNS 05:00
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The next week of nights

Tonight · 12 Aug
45
Fair
MOON 0%
04:00–05:00
Tomorrow · 13 Aug
59
Good
MOON 1%
20:00–01:00
Friday · 14 Aug
62
Good
MOON 5%
00:00–06:00
Saturday · 15 Aug
59
Good
MOON 8%
22:00–23:00
Sunday · 16 Aug
52
Fair
MOON 19%
22:00–23:00
Monday · 17 Aug
60
Good
MOON 28%
22:00–23:00
Tuesday · 18 Aug
56
Good
MOON 37%
22:00–23:00
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Nearby locations

About this forecast

Conditions for Madang, Papua New Guinea 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 →