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Tiruchchendur

8.497° N   78.119° E  ·  9 M
49 /100
PEAK
Marginal, but there is a 3 hours gap from 22:30.
BEST WINDOW 22:30–01:30 · ASTRO DARK 22:30–05:30 · MOON 0%
Transparency
0.51
Seeing
0.43
Cloud
31%
Moon
0%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
22
23
00
01
02
03
04
05
06
49
40
38
31
33
25
31
12
0
BEST WINDOW
Low cloud
2%
1%
1%
1%
1%
2%
2%
1%
1%
Mid cloud
16%
13%
12%
6%
13%
19%
14%
6%
5%
High cloud
16%
49%
55%
87%
75%
96%
81%
88%
73%
Transparency
0.51
0.47
0.47
0.47
0.48
0.47
0.46
0.46
0.46
Seeing
0.20
0.18
0.15
0.22
0.23
0.32
0.37
0.43
0.49
Moon clear
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
22 Fair · 49/100
Starting from
100
Cloud
−24
Transparency
−15
Seeing
−12
Moonlight
−0
Darkness
−0
Score
49
CLOUD 31% LOW 2% MID 16% HIGH 16% SUN -53.5° MOON -52.0° / 0% WIND 10 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 22:00 · OBSERVE 22:30–01:30 · 3H · MEAN 47

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

2200020406
CLOUD RETURNS 01:30
SET UP 22:00 · OBSERVE 22:30–23:30 · 1H · MEAN 42

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

2200020406
CLOUD RETURNS 23:30SEEING STAYS SOFT THROUGHOUTMOONLIGHT IGNORED FOR THIS TARGET
SET UP 22:00 · OBSERVE 22:30–01:30 · 3H · MEAN 43

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

2200020406
CLOUD RETURNS 01:30
SET UP 22:00 · OBSERVE 22:30–23:30 · 1H · MEAN 41

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

2200020406
CLOUD RETURNS 23:30
SET UP 22:00 · OBSERVE 22:30–01:30 · 3H · MEAN 49

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

2200020406
CLOUD RETURNS 01:30
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The next week of nights

Tonight · 12 Aug
49
Fair
MOON 0%
22:30–01:30
Tomorrow · 13 Aug
63
Good
MOON 2%
20:30–05:30
Friday · 14 Aug
46
Fair
MOON 6%
23:30–03:30
Saturday · 15 Aug
33
Poor
MOON 13%
Sunday · 16 Aug
64
Good
MOON 21%
23:30–00:30
Monday · 17 Aug
33
Poor
MOON 30%
Tuesday · 18 Aug
73
Good
MOON 39%
23:30–00:30
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About this forecast

Conditions for Tiruchchendur, India 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 →