GoodSeeing Search a place or postcode
MoreGuidesBest monthsAlertsLocationsMethodAccuracy
More
Home › Locations › St. John's
Tonight · Tue, 3 November 2026

St. John's

Tonight’s hourly cloud, moonlight and observing conditions.

47.565°N 52.709°W ·35 m ·Newfoundland and Labrador, Canada
Change place

Tonight · peak score /100
73Good
18:30–05:30
best window
Limited by
Transparency
Why this matters

Transparency 0.57 — haze and water vapour will cost you the faintest targets. Read the guide →

Site details and actions
Site darkness · peer measure
Bright skyNot multiplied into the conditions score
19.6–20.2 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 St. John's, Newfoundland and Labrador →Moonless nights →
Tonight in context · local sky & season

November historically: 0.7 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 7.3h 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
18:30 – 05:30
Window quality
61 / 100 avg
Astronomical dark
18:30 – 05:30
Moon
Waning crescent, 25%
Transparency at peak
0.57
Seeing at peak (est.)
0.54
Visual limit (modelled)
4.0–6.0 mag

The night, hour by hour

Colour = score · Luminance = everything else
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
0
16
65
70
73
67
41
50
53
66
63
61
61
39
0
Hour
Cloud %0313516422924100000
Transp. 0–10.690.610.600.600.570.500.470.480.430.330.230.200.200.190.20
Seeing est. /10.530.540.530.500.540.590.580.590.620.640.650.630.650.680.70
Moon alt. °-20-27-32-34-34-31-25-18-901019283643
DarknessDayTwil.DarkDarkDarkDarkDarkDarkDarkDarkDarkDarkDarkTwil.Twil.
Inspect all cloud layers and score factors
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
16
65
70
73
67
41
50
53
66
63
61
61
39
Score
BEST WINDOW · 12 H
Low cloud
0%
3%
13%
5%
1%
6%
42%
29%
24%
1%
0%
0%
0%
0%
0%
Mid cloud
0%
0%
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%
0%
0%
Transparency
0.69
0.61
0.60
0.60
0.57
0.50
0.47
0.48
0.43
0.33
0.23
0.20
0.20
0.19
0.20
Seeing
0.53
0.54
0.53
0.50
0.54
0.59
0.58
0.59
0.62
0.64
0.65
0.63
0.65
0.68
0.70
Moon clear
down
down
down
down
down
down
down
down
down
25%
25%
24%
24%
23%
23%
16
17
18
19
20
21
22
23
00
01
02
03
04
05
06
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
20 Good · 73/100
Starting from
100
Cloud
−1
Transparency
−17
Seeing
−9
Moonlight
−0
Darkness
−0
Score
73
CLOUD 1% LOW 1% MID 0% HIGH 0% SUN -38.5° MOON -33.9° / 27% WIND 7 TEMP 1°
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.

1618202200020406
SITE GLOW LIMITS THIS TARGET
SET UP 17:00 · OBSERVE 17:30–06:30 · 13H · MEAN 62

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

1618202200020406
TWILIGHT BEGINS 06:30MOONLIGHT IGNORED FOR THIS TARGET
SET UP 18:00 · OBSERVE 18:30–22:30 · 4H · MEAN 39

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

1618202200020406
ASTRONOMICAL DARK FROM 18:30CLOUD RETURNS 22:30SITE GLOW LIMITS FAINT TARGETS
SET UP 18:00 · OBSERVE 18:30–22:30 · 4H · MEAN 39

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

1618202200020406
ASTRONOMICAL DARK FROM 18:30CLOUD RETURNS 22:30
SET UP 19:00 · OBSERVE 19:30–21:30 · 2H · MEAN 36

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

1618202200020406
SITE GLOW LIMITS FAINT TARGETS

Deep-sky visual is your current default.

A darker option

Katahdin Woods and Waters

1,223 km away · Natural-dark sky · 21.8–21.9 mag/arcsec²

13conditions tonight
See the trade-off →

The next week of nights

Tonight
3 Nov73Moon 26%Reduced transparency is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
0
16
65
70
73
67
41
50
53
66
63
61
61
39
0
Hour
Cloud %0313516422924100000
Transp. 0–10.690.610.600.600.570.500.470.480.430.330.230.200.200.190.20
Seeing est. /10.530.540.530.500.540.590.580.590.620.640.650.630.650.680.70
Moon alt. °-20-27-32-34-34-31-25-18-901019283643
DarknessDayTwil.DarkDarkDarkDarkDarkDarkDarkDarkDarkDarkDarkTwil.Twil.
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
16
65
70
73
67
41
50
53
66
63
61
61
39
Score
Low cloud
0%
3%
13%
5%
1%
6%
42%
29%
24%
1%
0%
0%
0%
0%
0%
Mid cloud
0%
0%
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%
0%
0%
Transparency
0.69
0.61
0.60
0.60
0.57
0.50
0.47
0.48
0.43
0.33
0.23
0.20
0.20
0.19
0.20
Seeing
0.53
0.54
0.53
0.50
0.54
0.59
0.58
0.59
0.62
0.64
0.65
0.63
0.65
0.68
0.70
Moon clear
down
down
down
down
down
down
down
down
down
25%
25%
24%
24%
23%
23%
16
17
18
19
20
21
22
23
00
01
02
03
04
05
06

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

Tomorrow
4 Nov73Moon 16%Reduced transparency is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
0
18
69
73
70
67
66
66
67
68
68
61
57
44
0
Hour
Cloud %2061011210322172511
Transp. 0–10.540.470.440.380.330.250.210.210.250.270.260.240.240.230.21
Seeing est. /10.930.930.950.920.850.880.880.860.870.910.920.900.880.880.86
Moon alt. °-18-27-34-39-41-40-36-29-21-12-27162532
DarknessDayTwil.DarkDarkDarkDarkDarkDarkDarkDarkDarkDarkDarkTwil.Twil.
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
18
69
73
70
67
66
66
67
68
68
61
57
44
Score
Low cloud
11%
4%
9%
1%
1%
2%
1%
0%
0%
0%
0%
0%
0%
0%
1%
Mid cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
0%
0%
2%
0%
0%
High cloud
9%
1%
1%
0%
0%
0%
0%
0%
3%
1%
2%
17%
24%
1%
0%
Transparency
0.54
0.47
0.44
0.38
0.33
0.25
0.21
0.21
0.25
0.27
0.26
0.24
0.24
0.23
0.21
Seeing
0.93
0.93
0.95
0.92
0.85
0.88
0.88
0.86
0.87
0.91
0.92
0.90
0.88
0.88
0.86
Moon clear
down
down
down
down
down
down
down
down
down
down
down
15%
15%
15%
15%
16
17
18
19
20
21
22
23
00
01
02
03
04
05
06

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

Thursday
5 Nov43Moon 11%Reduced transparency is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
0
9
43
42
30
0
0
Hour
Cloud %4876535283100100
Transp. 0–10.330.250.220.220.210.100.10
Seeing est. /10.550.570.580.520.460.630.57
Moon alt. °-16-26-34-41-46-1532
DarknessDayTwil.DarkDarkDarkDarkDay
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
9
43
42
30
Score
Low cloud
0%
0%
1%
2%
5%
100%
100%
Mid cloud
0%
2%
2%
2%
4%
53%
81%
High cloud
48%
76%
52%
52%
82%
98%
98%
Transparency
0.33
0.25
0.22
0.22
0.21
0.10
0.10
Seeing
0.55
0.57
0.58
0.52
0.46
0.63
0.57
Moon clear
down
down
down
down
down
down
7%
16
17
18
19
20
02
08

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

Friday
6 Nov2Moon 4%Cloud or fog is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
0
0
2
0
Hour
Cloud %1009997100
Transp. 0–10.100.100.100.10
Seeing est. /10.820.880.810.86
Moon alt. °6-49-2624
DarknessDayDarkDarkDay
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
2
Score
Low cloud
100%
98%
96%
88%
Mid cloud
1%
30%
0%
100%
High cloud
29%
60%
20%
20%
Transparency
0.10
0.10
0.10
0.10
Seeing
0.82
0.88
0.81
0.86
Moon clear
6%
down
down
3%
14
20
02
08

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

Saturday
7 Nov0Moon 1%Cloud or fog is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
0
0
0
0
Hour
Cloud %100100100100
Transp. 0–10.100.100.100.10
Seeing est. /10.810.810.650.65
Moon alt. °9-48-3715
DarknessDayDarkDarkDay
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
Score
Low cloud
100%
100%
100%
100%
Mid cloud
100%
100%
100%
100%
High cloud
19%
94%
86%
98%
Transparency
0.10
0.10
0.10
0.10
Seeing
0.81
0.81
0.65
0.65
Moon clear
2%
down
down
1%
14
20
02
08

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

Sunday
8 Nov2Moon 0%Cloud or fog is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
0
0
2
0
Hour
Cloud %100100100100
Transp. 0–10.100.100.100.10
Seeing est. /10.750.830.770.52
Moon alt. °10-45-486
DarknessDayDarkDarkDay
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
2
Score
Low cloud
98%
100%
23%
100%
Mid cloud
91%
100%
100%
40%
High cloud
71%
91%
100%
33%
Transparency
0.10
0.10
0.10
0.10
Seeing
0.75
0.83
0.77
0.52
Moon clear
0%
down
down
0%
14
20
02
08

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

Monday
9 Nov0Moon 1%Cloud or fog is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/St_Johns)
Score
0
0
0
0
Hour
Cloud %100100100100
Transp. 0–10.100.100.100.10
Seeing est. /10.620.881.000.84
Moon alt. °12-40-57-2
DarknessDayDarkDarkDay
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
Score
Low cloud
100%
98%
100%
100%
Mid cloud
0%
0%
95%
30%
High cloud
0%
95%
98%
81%
Transparency
0.10
0.10
0.10
0.10
Seeing
0.62
0.88
1.00
0.84
Moon clear
1%
down
down
down
14
20
02
08

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

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

Planning a trip?

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

About this forecast

Exact-coordinate weather, sky geometry and site context.

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

Conditions for St. John's, Newfoundland and Labrador, 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.