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Tonight · Sat, 10 October 2026

White Rock stargazing forecast tonight

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

49.020°N 122.795°W ·67 m ·British Columbia, Canada

NearbySurreyLangleyPitt MeadowsPort CoquitlamMore nearby
70
/100
Good conditions
at peak

Worth setting up — 9 hours of workable sky from 21:00.

Site darkness · peer measure
Bright skyNot multiplied into the conditions score
18.9–19.6 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 White Rock, British Columbia →Moonless nights →
Tonight in context · local sky & season

October historically: 3.9 qualifying nights/month on average (2005–2024). Regional cloud and darkness history, not tonight’s probability or a comparison with the conditions score.

A qualifying historical night has at least 3 hours of astronomical darkness and mean nighttime cloud ≤30%. This does not measure steady air or target visibility. Seasonal history →

Saturn: about 8.0h 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
21:00 – 06:00
Window quality
66 / 100 avg
Astronomical dark
21:00 – 06:00
Moon
New moon, 1%
Transparency at peak
0.32
Seeing at peak (est.)
0.85
Visual limit (modelled)
3.5–5.0 mag
Tonight's limiting factor
Transparency

Transparency 0.32 — haze and water vapour will cost you the faintest targets. What this means →

The night, hour by hour

Colour = score · Luminance = everything else
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
49
63
64
65
65
67
70
70
68
66
49
Score
BEST WINDOW · 10 H
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
2%
1%
1%
0%
1%
0%
0%
0%
0%
0%
0%
0%
0%
High cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Transparency
0.26
0.19
0.16
0.16
0.19
0.21
0.26
0.32
0.35
0.33
0.27
0.24
0.28
Seeing
0.75
0.78
0.86
0.86
0.86
0.82
0.82
0.85
0.78
0.72
0.75
0.82
0.87
Moon clear
down
down
down
down
down
down
down
down
down
down
down
down
down
19
20
21
22
23
00
01
02
03
04
05
06
07
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 Good · 70/100
Starting from
100
Cloud
−0
Transparency
−27
Seeing
−3
Moonlight
−0
Darkness
−0
Score
70
CLOUD 0% LOW 0% MID 0% HIGH 0% SUN -45.9° MOON -55.0° / 1% WIND 4 TEMP 8°
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.

19212301030507
SITE GLOW LIMITS THIS TARGET
SET UP 19:30 · OBSERVE 20:00–07:00 · 11H · MEAN 77

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

19212301030507
TWILIGHT BEGINS 07:00MOONLIGHT IGNORED FOR THIS TARGET
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

19212301030507
SITE GLOW LIMITS THIS TARGET
SET UP 02:30 · OBSERVE 03:00–04:00 · 1H · MEAN 35

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

19212301030507
SITE GLOW LIMITS FAINT TARGETS
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

19212301030507
SITE GLOW LIMITS THIS TARGET

Deep-sky visual is your current default.

A darker option

Jasper National Park

541 km away · Threatened dark sky · 21.7–21.8 mag/arcsec²

3conditions tonight
See the trade-off →

The next week of nights

Tonight · 10 Oct
70
Good
MOON 1%
21:00–06:00
Tomorrow · 11 Oct
66
Good
MOON 3%
21:00–06:00
Monday · 12 Oct
66
Good
MOON 7%
21:00–06:00
Tuesday · 13 Oct
45
Fair
MOON 15%
05:00–06:00
Wednesday · 14 Oct
44
Fair
MOON 22%
23:00–00:00
Thursday · 15 Oct
0
Not worth it

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

MOON 31%
Friday · 16 Oct
50
Fair
MOON 40%
05:00–06:00

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
49
63
64
65
65
67
70
70
68
66
49
Score
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
2%
1%
1%
0%
1%
0%
0%
0%
0%
0%
0%
0%
0%
High cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Transparency
0.26
0.19
0.16
0.16
0.19
0.21
0.26
0.32
0.35
0.33
0.27
0.24
0.28
Seeing
0.75
0.78
0.86
0.86
0.86
0.82
0.82
0.85
0.78
0.72
0.75
0.82
0.87
Moon clear
down
down
down
down
down
down
down
down
down
down
down
down
down
19
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.

Tomorrow · 11 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
53
64
63
64
64
63
64
66
65
64
49
Score
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
High cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Transparency
0.45
0.37
0.30
0.27
0.25
0.21
0.18
0.18
0.19
0.13
0.10
0.12
0.15
Seeing
0.62
0.58
0.57
0.58
0.64
0.72
0.77
0.83
0.93
0.98
1.00
0.98
1.00
Moon clear
down
down
down
down
down
down
down
down
down
down
down
down
down
19
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.

Monday · 12 Oct · forecast times
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
51
66
64
63
62
63
58
50
61
52
Score
Low cloud
1%
1%
2%
2%
1%
0%
0%
0%
0%
0%
0%
0%
3%
Mid cloud
0%
0%
0%
0%
0%
0%
4%
2%
6%
5%
2%
8%
22%
High cloud
6%
12%
16%
0%
0%
0%
0%
0%
8%
37%
11%
30%
0%
Transparency
0.28
0.23
0.21
0.19
0.14
0.17
0.17
0.16
0.16
0.19
0.23
0.24
0.53
Seeing
1.00
1.00
1.00
1.00
0.95
0.82
0.86
0.91
0.86
0.84
0.84
0.84
1.00
Moon clear
7%
down
down
down
down
down
down
down
down
down
down
down
down
18
19
20
21
22
23
00
01
02
03
04
05
11

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
4
45
Score
Low cloud
1%
57%
13%
9%
Mid cloud
25%
83%
31%
20%
High cloud
0%
91%
1%
52%
Transparency
0.57
0.29
0.30
0.49
Seeing
1.00
1.00
1.00
1.00
Moon clear
12%
down
down
down
17
23
05
11

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
44
31
Score
Low cloud
7%
1%
0%
3%
Mid cloud
21%
9%
0%
0%
High cloud
81%
46%
95%
16%
Transparency
0.50
0.10
0.10
0.28
Seeing
1.00
1.00
1.00
1.00
Moon clear
19%
down
down
down
17
23
05
11

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
Score
Low cloud
14%
100%
100%
46%
Mid cloud
0%
0%
0%
0%
High cloud
4%
2%
0%
0%
Transparency
0.10
0.10
0.10
0.10
Seeing
1.00
1.00
1.00
1.00
Moon clear
27%
down
down
down
17
23
05
11

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
50
Score
Low cloud
22%
100%
1%
9%
Mid cloud
0%
100%
9%
2%
High cloud
98%
18%
10%
2%
Transparency
0.25
0.10
0.10
0.29
Seeing
0.93
0.74
0.63
0.67
Moon clear
35%
down
down
down
17
23
05
11

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

Planning a trip?

Compare the next eight weekends → · Best months to visit → · Moonless nights →

More nearby locations 8 options · openclose

About this forecast

Exact-coordinate weather, sky geometry and site context.

Full method →20-year baseline →
Sources and scoring details openclose

Conditions for White Rock, British Columbia, Canada 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.