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Tonight · Sat, 10 October 2026

Roque de los Muchachos (La Palma) stargazing forecast tonight

Hourly clear-sky conditions for observing: cloud by layer, transparency, estimated seeing, moonlight and true astronomical darkness.

28.754°N 17.885°W ·2396 m ·Canary Islands, Spain

30
/100
Poor conditions
at peak

Cloud or fog is the strongest score limit at the best sampled time.

Site darkness · peer measure
Natural-dark skyNot multiplied into the conditions score
21.7–21.8 mag/arcsec²

The score describes tonight’s conditions. Site darkness helps you choose what to observe.

See target outlook ↓Planet observing times →
Best months at Roque de los Muchachos (La Palma), Canary Islands →Moonless nights →
Tonight in context · local sky & season

Saturn: about 9.0h above 20° during this observing night’s darkness. Longest sampled dark-time opportunity among our four planet targets; not a weather ranking. Planet times →

Position calculations use roughly 20-minute samples. Clouds, skyglow and local obstructions still matter. Milky Way timing →

Best window
None tonight
Window quality
—
Astronomical dark
22:00 – 07:00
Moon
New moon, 1%
Transparency at peak
0.17
Seeing at peak (est.)
0.52
Visual limit (modelled)
5.5–6.5 mag
Tonight's limiting factor
Transparency

Transparency 0.17 — haze and water vapour will cost you the faintest targets. What this means →

Also limiting: Low cloud. See the guide →

The night, hour by hour

Colour = score · Luminance = everything else
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
1
3
7
2
29
30
1
3
2
2
1
Score
Low cloud
87%
84%
82%
84%
84%
49%
48%
89%
88%
85%
84%
87%
84%
Mid cloud
0%
0%
0%
0%
0%
0%
0%
1%
1%
1%
0%
0%
0%
High cloud
8%
45%
62%
48%
8%
4%
0%
0%
0%
1%
0%
9%
16%
Transparency
0.17
0.18
0.19
0.19
0.19
0.18
0.17
0.16
0.16
0.16
0.16
0.16
0.15
Seeing
0.37
0.36
0.37
0.40
0.44
0.47
0.52
0.57
0.64
0.68
0.75
0.74
0.69
Moon clear
down
down
down
down
down
down
down
down
down
down
down
down
down
20
21
22
23
00
01
02
03
04
05
06
07
08
Inspect

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Score inspectorWhy this hour scored what it did Open peakClose
02 Poor · 30/100
Starting from
100
Cloud
−48
Transparency
−17
Seeing
−4
Moonlight
−0
Darkness
−0
Score
30
CLOUD 48% LOW 48% MID 0% HIGH 0% SUN -68.0° MOON -73.6° / 0% WIND 7 TEMP 7°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.

What can you actually do tonight?

This is GoodSeeing’s decision layer: the same forecast is weighted for your target and site darkness. Planetary work barely cares about moonlight; long exposures can fail on high cloud a visual observer would barely notice. Your choice is remembered on this device and becomes the default for new alert rules.

NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

20220002040608
CLOUD NEVER DROPS BELOW 48%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

20220002040608
CLOUD NEVER DROPS BELOW 48%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

20220002040608
CLOUD NEVER DROPS BELOW 48%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

20220002040608
CLOUD NEVER DROPS BELOW 48%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

20220002040608
CLOUD NEVER DROPS BELOW 48%

Deep-sky visual is your current default.

A darker option

Isle of Coll

3,224 km away · Natural-dark sky · 21.9–21.9 mag/arcsec²

34conditions tonight
See the trade-off →

The next week of nights

Tonight · 10 Oct
30
Poor

Cloud or fog is the strongest score limit at the best sampled time.

MOON 1%
Tomorrow · 11 Oct
14
Not worth it

Cloud or fog is the strongest score limit at the best sampled time.

MOON 2%
Monday · 12 Oct
2
Not worth it

Cloud or fog is the strongest score limit at the best sampled time.

MOON 6%
Tuesday · 13 Oct
5
Not worth it

Cloud or fog is the strongest score limit at the best sampled time.

MOON 12%
Wednesday · 14 Oct
10
Not worth it

Cloud or fog is the strongest score limit at the best sampled time.

MOON 19%
Thursday · 15 Oct
60
Good
MOON 27%
07:00–08:00
Friday · 16 Oct
53
Fair
MOON 35%
07:00–08:00

Open a night for its forecast times. Later forecasts may have wider time steps; missing hours are not interpolated.

Tonight · 10 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
1
3
7
2
29
30
1
3
2
2
1
Score
Low cloud
87%
84%
82%
84%
84%
49%
48%
89%
88%
85%
84%
87%
84%
Mid cloud
0%
0%
0%
0%
0%
0%
0%
1%
1%
1%
0%
0%
0%
High cloud
8%
45%
62%
48%
8%
4%
0%
0%
0%
1%
0%
9%
16%
Transparency
0.17
0.18
0.19
0.19
0.19
0.18
0.17
0.16
0.16
0.16
0.16
0.16
0.15
Seeing
0.37
0.36
0.37
0.40
0.44
0.47
0.52
0.57
0.64
0.68
0.75
0.74
0.69
Moon clear
down
down
down
down
down
down
down
down
down
down
down
down
down
20
21
22
23
00
01
02
03
04
05
06
07
08

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Tomorrow · 11 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
1
2
3
14
3
3
3
2
2
1
1
Score
Low cloud
5%
85%
84%
76%
59%
75%
74%
75%
81%
84%
91%
88%
88%
Mid cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
High cloud
0%
0%
0%
0%
0%
0%
2%
13%
2%
0%
0%
0%
0%
Transparency
0.26
0.17
0.17
0.18
0.18
0.18
0.18
0.18
0.18
0.16
0.16
0.15
0.15
Seeing
0.54
0.56
0.59
0.63
0.67
0.73
0.72
0.76
0.81
0.75
0.73
0.72
0.68
Moon clear
2%
down
down
down
down
down
down
down
down
down
down
down
down
20
21
22
23
00
01
02
03
04
05
06
07
08

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Monday · 12 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
1
1
1
1
1
2
1
1
Score
Low cloud
87%
85%
88%
87%
88%
91%
95%
88%
89%
89%
96%
95%
Mid cloud
0%
0%
0%
0%
0%
0%
0%
0%
1%
1%
1%
2%
High cloud
0%
0%
0%
0%
0%
4%
56%
72%
92%
85%
91%
97%
Transparency
0.15
0.16
0.16
0.16
0.16
0.16
0.15
0.10
0.10
0.10
0.10
0.15
Seeing
0.37
0.37
0.33
0.30
0.29
0.39
0.43
0.41
0.35
0.31
0.30
0.31
Moon clear
5%
down
down
down
down
down
down
down
down
down
down
down
20
21
22
23
00
01
02
03
04
05
06
07

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Tuesday · 13 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
5
4
Score
Low cloud
53%
88%
88%
Mid cloud
0%
0%
0%
High cloud
4%
63%
83%
Transparency
0.31
0.15
0.16
Seeing
0.78
0.71
0.81
Moon clear
10%
down
down
19
01
07

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Wednesday · 14 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
9
10
Score
Low cloud
92%
77%
81%
Mid cloud
0%
0%
0%
High cloud
0%
72%
27%
Transparency
0.35
0.17
0.16
Seeing
0.84
0.92
0.92
Moon clear
17%
down
down
19
01
07

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Thursday · 15 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
32
60
Score
Low cloud
36%
52%
6%
Mid cloud
0%
0%
0%
High cloud
0%
0%
0%
Transparency
0.26
0.18
0.30
Seeing
0.95
1.00
1.00
Moon clear
24%
down
down
19
01
07

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Friday · 16 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
24
53
Score
Low cloud
38%
64%
13%
Mid cloud
0%
0%
0%
High cloud
0%
0%
0%
Transparency
0.27
0.17
0.16
Seeing
0.98
1.00
1.00
Moon clear
33%
down
down
19
01
07

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

About this forecast

Exact-coordinate weather, sky geometry and site context.

Full method →
Sources and scoring details openclose

Conditions for Roque de los Muchachos (La Palma), Canary Islands, Spain 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 astronomical twilight. Site darkness is shown separately, then used only where artificial skyglow physically changes moon contrast, haze scattering, visual limits and target suitability.