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Tonight · Tue, 3 November 2026

Yarmouth

Tonight’s hourly cloud, moonlight and observing conditions.

41.706°N 70.229°W ·9 m ·Massachusetts, United States
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Nearby places
NortonBarringtonWinthropWarwickMore nearby
Tonight · peak score /100
33Poor
No usable window
best window
Limited by
Thin high cloud
Why this matters

84% high cirrus. Visual observers shrug it off; long exposures integrate it. Read the guide →

Also limiting: Transparency. See the guide →

Site details and actions
Site darkness · peer measure
Brightened skyNot multiplied into the conditions score
20.5–21.0 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 Yarmouth, Massachusetts →Moonless nights →
Tonight in context · local sky & season

November historically: 2.2 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 7.7h 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
02:00 – 05:00
Moon
Waning crescent, 32%
Transparency at peak
0.33
Seeing at peak (est.)
0.55
Visual limit (modelled)
4.5–6.0 mag

The night, hour by hour

Colour = score · Luminance = everything else
Score 0–100 · underline marks the best window · local time (America/New_York)
Score
30
33
31
23
0
Hour
Cloud %9584897985
Transp. 0–10.350.330.320.310.29
Seeing est. /10.540.550.580.600.62
Moon alt. °2031415056
DarknessDarkDarkDarkTwil.Twil.
Inspect all cloud layers and score factors
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
30
33
31
23
Score
Low cloud
0%
0%
0%
0%
0%
Mid cloud
1%
0%
0%
7%
4%
High cloud
95%
84%
89%
77%
84%
Transparency
0.35
0.33
0.32
0.31
0.29
Seeing
0.54
0.55
0.58
0.60
0.62
Moon clear
35%
34%
34%
33%
33%
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
03 Poor · 33/100
Starting from
100
Cloud
−46
Transparency
−14
Seeing
−4
Moonlight
−2
Darkness
−0
Score
33
CLOUD 84% LOW 0% MID 0% HIGH 84% SUN -36.7° MOON 30.6° / 34% WIND 7 TEMP 13°
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.

020406
CLOUD NEVER DROPS BELOW 79%SITE GLOW LIMITS THIS TARGET
SET UP 02:30 · OBSERVE 03:00–04:00 · 1H · MEAN 35

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

020406
MOONLIGHT 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.

020406
CLOUD NEVER DROPS BELOW 79%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

020406
CLOUD NEVER DROPS BELOW 79%
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

020406
CLOUD NEVER DROPS BELOW 79%SITE GLOW LIMITS THIS TARGET

Deep-sky visual is your current default.

A darker option

Acadia National Park

333 km away · Threatened dark sky · 21.6–21.7 mag/arcsec²

4conditions tonight
See the trade-off →

The next week of nights

Tonight
2 Nov33Moon 32%Cloud or fog is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/New_York)
Score
30
33
31
23
0
Hour
Cloud %9584897985
Transp. 0–10.350.330.320.310.29
Seeing est. /10.540.550.580.600.62
Moon alt. °2031415056
DarknessDarkDarkDarkTwil.Twil.
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
30
33
31
23
Score
Low cloud
0%
0%
0%
0%
0%
Mid cloud
1%
0%
0%
7%
4%
High cloud
95%
84%
89%
77%
84%
Transparency
0.35
0.33
0.32
0.31
0.29
Seeing
0.54
0.55
0.58
0.60
0.62
Moon clear
35%
34%
34%
33%
33%
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
3 Nov48Moon 25%Reduced transparency is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/New_York)
Score
0
25
29
32
33
30
32
48
46
37
34
39
35
0
Hour
Cloud %9098927781858242436365531813
Transp. 0–10.430.350.340.360.390.370.360.320.280.250.230.210.180.15
Seeing est. /10.590.640.640.620.580.620.630.570.560.560.580.590.600.62
Moon alt. °-30-36-40-40-37-31-23-14-3718283846
DarknessTwil.Twil.DarkDarkDarkDarkDarkDarkDarkDarkDarkDarkTwil.Twil.
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
25
29
32
33
30
32
48
46
37
34
39
35
Score
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
2%
5%
7%
6%
7%
8%
Mid cloud
1%
8%
13%
27%
18%
20%
18%
9%
6%
7%
9%
6%
7%
9%
High cloud
90%
98%
91%
70%
77%
82%
78%
37%
40%
60%
62%
50%
11%
4%
Transparency
0.43
0.35
0.34
0.36
0.39
0.37
0.36
0.32
0.28
0.25
0.23
0.21
0.18
0.15
Seeing
0.59
0.64
0.64
0.62
0.58
0.62
0.63
0.57
0.56
0.56
0.58
0.59
0.60
0.62
Moon clear
down
down
down
down
down
down
down
down
down
24%
24%
23%
23%
23%
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.

Wednesday
4 Nov64Moon 16%Reduced transparency is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/New_York)
Score
0
57
64
64
63
62
61
61
61
60
58
58
38
0
Hour
Cloud %0000000000222022
Transp. 0–10.330.330.310.270.250.200.160.140.130.130.100.100.100.10
Seeing est. /10.510.520.550.590.630.660.690.700.720.710.710.720.690.66
Moon alt. °-29-37-44-47-46-42-35-26-16-55162634
DarknessTwil.Twil.DarkDarkDarkDarkDarkDarkDarkDarkDarkDarkTwil.Twil.
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
57
64
64
63
62
61
61
61
60
58
58
38
Score
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
2%
2%
1%
3%
Mid cloud
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%
1%
20%
20%
Transparency
0.33
0.33
0.31
0.27
0.25
0.20
0.16
0.14
0.13
0.13
0.10
0.10
0.10
0.10
Seeing
0.51
0.52
0.55
0.59
0.63
0.66
0.69
0.70
0.72
0.71
0.71
0.72
0.69
0.66
Moon clear
down
down
down
down
down
down
down
down
down
down
15%
15%
15%
14%
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 Nov24Moon 10%Cloud or fog is the strongest score limit at the best sampled time. ↓
Score 0–100 · underline marks the best window · local time (America/New_York)
Score
0
22
24
0
Hour
Cloud %65986999
Transp. 0–10.340.100.100.10
Seeing est. /10.440.700.720.72
Moon alt. °17-45-2831
DarknessDayDarkDarkDay
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
22
24
Score
Low cloud
5%
0%
9%
11%
Mid cloud
0%
21%
56%
59%
High cloud
63%
97%
23%
99%
Transparency
0.34
0.10
0.10
0.10
Seeing
0.44
0.70
0.72
0.72
Moon clear
12%
down
down
7%
13
19
01
07

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

Friday
6 Nov11Moon 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/New_York)
Score
0
11
6
0
Hour
Cloud %100100100100
Transp. 0–10.100.130.100.10
Seeing est. /10.670.680.990.85
Moon alt. °20-43-4020
DarknessDayDarkDarkDay
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
11
6
Score
Low cloud
26%
11%
10%
86%
Mid cloud
31%
59%
84%
100%
High cloud
99%
100%
99%
98%
Transparency
0.10
0.13
0.10
0.10
Seeing
0.67
0.68
0.99
0.85
Moon clear
6%
down
down
3%
13
19
01
07

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/New_York)
Score
0
0
0
0
Hour
Cloud %99100100100
Transp. 0–10.100.100.100.22
Seeing est. /10.941.000.780.78
Moon alt. °22-39-5110
DarknessDayDarkDarkDay
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
Score
Low cloud
84%
100%
100%
100%
Mid cloud
49%
1%
0%
0%
High cloud
88%
13%
0%
0%
Transparency
0.10
0.10
0.10
0.22
Seeing
0.94
1.00
0.78
0.78
Moon clear
2%
down
down
1%
13
19
01
07

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

Sunday
8 Nov28Moon 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/New_York)
Score
0
28
25
0
Hour
Cloud %23965240
Transp. 0–10.380.110.130.20
Seeing est. /10.940.960.760.81
Moon alt. °23-34-620
DarknessDayDarkDarkDay
All factors for this night
Sky state
Shaded = daylight and twilight  ·  unshaded = astronomical dark
28
25
Score
Low cloud
23%
6%
43%
4%
Mid cloud
0%
0%
33%
38%
High cloud
0%
96%
0%
0%
Transparency
0.38
0.11
0.13
0.20
Seeing
0.94
0.96
0.76
0.81
Moon clear
0%
down
down
0%
13
19
01
07

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 →

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 Yarmouth, Massachusetts, United States 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.