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Mount Gambier

-37.832° S 140.779° E · 41 M

48 /100
PEAK

Marginal, but there is a 2 hours gap from 04:30.

BEST WINDOW 04:30–06:30 · ASTRO DARK 03:30–05:30 · MOON 0%

Transparency

0.42

Seeing

0.79

Cloud

25%

Moon

Fair tonight

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

Sky state

Lighter = daylight and twilight · unshaded = astronomical dark

Score

BEST WINDOW

Low cloud

53%

43%

25%

30%

Mid cloud

11%

20%

High cloud

Transparency

0.30

0.32

0.42

0.39

Seeing

0.76

0.77

0.79

0.88

Moon clear

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

03 Poor · 29/100

Starting from

100

Cloud

−58

Transparency

−12

Seeing

−2

Moonlight

−0

Darkness

−0

Score

CLOUD 54% LOW 53% MID 11% HIGH 0% SUN -40.9° MOON -42.7° / 0% WIND 4 TEMP 11°

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

Conditions for planets and the Moon

Seeing is everything. Darkness and moonlight barely matter, and a hazy, humid night that ruins deep-sky work is often the steadiest night of the year for planetary detail.

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.

Deep-sky visualPlanetary & lunarWide-field imagingLong exposureMeteor watching

SET UP 04:00 · OBSERVE 04:30–06:30 · 2H · MEAN 44

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

0305

TWILIGHT BEGINS 06:30

SET UP 04:00 · OBSERVE 04:30–06:30 · 2H · MEAN 49

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

0305

TWILIGHT BEGINS 06:30MOONLIGHT IGNORED FOR THIS TARGET

SET UP 04:00 · OBSERVE 04:30–06:30 · 2H · MEAN 42

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

0305

TWILIGHT BEGINS 06:30

SET UP 05:00 · OBSERVE 05:30–06:30 · 1H · MEAN 36

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

0305

CLOUD BREAKS 05:30TWILIGHT BEGINS 06:30

SET UP 04:00 · OBSERVE 04:30–06:30 · 2H · MEAN 43

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

0305

TWILIGHT BEGINS 06:30

The next week of nights

Tonight · 12 Aug

Fair

MOON 0%
04:30–06:30

Tomorrow · 13 Aug

Fair

MOON 1%
21:30–23:30

Friday · 14 Aug

Good

MOON 5%
19:30–06:30

Saturday · 15 Aug

Good

MOON 8%
03:30–04:30

Sunday · 16 Aug

Good

MOON 19%
03:30–04:30

Monday · 17 Aug

Good

MOON 28%
21:30–22:30

Tuesday · 18 Aug

Fair

MOON 37%
03:30–04:30

About this forecast

Conditions for Mount Gambier, South Australia, Australia 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 →