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Guayaquil

-2.196° S   79.886° W  ·  14 M
66 /100
PEAK
Worth setting up — 4 hours of workable sky from 22:00.
BEST WINDOW 22:00–02:00 · ASTRO DARK 20:00–06:00 · MOON 1%
Transparency
0.54
Seeing
1.00
Cloud
16%
Moon
1%

Good tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
18
19
20
21
22
23
00
01
02
03
04
05
06
07
0
1
43
32
52
45
66
47
9
2
36
61
3
0
BEST WINDOW
Low cloud
96%
95%
36%
37%
18%
36%
10%
32%
88%
98%
50%
16%
13%
14%
Mid cloud
91%
50%
14%
40%
20%
11%
6%
10%
10%
15%
8%
6%
6%
5%
High cloud
18%
11%
3%
0%
0%
0%
1%
1%
0%
0%
0%
0%
0%
0%
Transparency
0.54
0.52
0.54
0.51
0.48
0.47
0.45
0.44
0.43
0.43
0.43
0.42
0.41
0.41
Seeing
0.85
0.83
0.84
0.87
0.90
0.93
0.97
0.98
1.00
1.00
1.00
1.00
1.00
1.00
Moon clear
0%
down
down
down
down
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
18 Clouded out · 0/100
Starting from
100
Cloud
−99
Transparency
−0
Seeing
−0
Moonlight
−0
Darkness
−1
Score
0
CLOUD 98% LOW 96% MID 91% HIGH 18% SUN 5.4° MOON 9.8° / 0% WIND 4 TEMP 28°
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.

SET UP 21:30 · OBSERVE 22:00–02:00 · 4H · MEAN 53

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

18202200020406
CLOUD BREAKS 22:00CLOUD RETURNS 02:00
SET UP 19:30 · OBSERVE 20:00–02:00 · 6H · MEAN 53

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

18202200020406
CLOUD BREAKS 20:00CLOUD RETURNS 02:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 21:30 · OBSERVE 22:00–02:00 · 4H · MEAN 51

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

18202200020406
CLOUD BREAKS 22:00CLOUD RETURNS 02:00
SET UP 23:30 · OBSERVE 00:00–01:00 · 1H · MEAN 53

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

18202200020406
CLOUD BREAKS 00:00CLOUD RETURNS 01:00
SET UP 21:30 · OBSERVE 22:00–02:00 · 4H · MEAN 52

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

18202200020406
CLOUD BREAKS 22:00CLOUD RETURNS 02:00
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The next week of nights

Tonight · 12 Aug
66
Good
MOON 0%
22:00–02:00
Tomorrow · 13 Aug
63
Good
MOON 3%
21:00–06:00
Friday · 14 Aug
67
Good
MOON 7%
20:00–02:00
Saturday · 15 Aug
5
Clouded out
MOON 15%
Sunday · 16 Aug
0
Clouded out
MOON 23%
Monday · 17 Aug
43
Fair
MOON 32%
01:00–02:00
Tuesday · 18 Aug
6
Clouded out
MOON 42%
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Nearby locations

About this forecast

Conditions for Guayaquil, Ecuador 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 →