Will it be clear for stargazing in Jeju tonight?

Clear until about 03:00, then cloudier; the Moon (61% lit) rises at 22:09. That is the hourly total-cloud forecast for Jeju, South Korea on the night of 2 October 2026, read inside the darkest hours: under 25% cloud counts as clear and 65% or more as cloudy. Most of the cloud is high and thin, which dims faint objects rather than hiding the sky.

When does it get dark in Jeju tonight?

In Jeju, South Korea on the night of 2 October 2026, astronomical darkness begins at 19:40 and lasts until 05:06 GMT+9 — 9 h 27 min of fully dark sky. The Sun sets at 18:17, and nautical twilight ends at 19:11.

Is the Moon up tonight in Jeju?

On the night of 2 October 2026 in Jeju, South Korea, the Moon is a waning gibbous, 61% illuminated. It sets at 12:27 and rises at 22:09, GMT+9. 2 h 30 min of the dark window is moon-free.

Which planets can I see from Jeju tonight?

From Jeju, South Korea on the night of 2 October 2026: Mars (02:10–05:06, highest 48° in the E at 05:06, magnitude 1.1); Jupiter (03:30–05:06, highest 31° in the E at 05:06, magnitude -1.9); Saturn (19:40–05:06, highest 59° in the S at 00:30, magnitude 0.2). Times are GMT+9; all are visible to the naked eye.

Stargazing forecast

Stargazing forecast for Jeju, South Korea

Fri 2 Oct night
33.510° N, 126.522° E
19 m
GMT+9 · Asia/Seoul

Open the live forecast — sky score, seeing, 7 nights

Tonight at a glance

Clear until about 03:00, then cloudier; the Moon (61% lit) rises at 22:09.

Most of the cloud is high and thin, which dims faint objects rather than hiding the sky.

Updated 13:13 GMT+9 (2 Oct, 04:13 UTC) · MET Norway forecast issued 2 Oct, 01:20 UTC

Cloud cover: 10%Clear
Dark hours: 9 h 27 min19:40–05:06
Moon: 61%2 h 30 min moon-free
Wind: 19 km/hLight
Low temperature: 18°CDuring the dark hours
Dew risk: LowAir comes within 7° of the dew point

Photo: Milky Way over Paranal — ESO/A. Ghizzi Panizza (www.albertoghizzipanizza.com), CC BY 4.0

Hourly forecast

Cloud by layer, hour by hour. Darker blue means clearer sky; each cell shows its percentage. Low cloud blocks the sky outright; thin high cloud only dims it.

Hourly cloud cover (%) and conditions tonight in Jeju
GMT+9	Fri 2								Sat 3																								Sun 4
Hour	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07
Sky: Daylight 16–18, Civil twilight 18–19, Astronomical twilight 19–20, Dark 20–05, Astronomical twilight 05–06, Daylight 06–18, Civil twilight 18–19, Astronomical twilight 19–20, Dark 20–05, Astronomical twilight 05–06, Daylight 06–08
Total cloud	83	6	0	0	0	0	0	0	0	0	8	35	31	34	38	45	31	13	8	48	52	71	95	97	90	95	41	99	68	96	100	100	100	100	100	100	100	100	100	100
Low cloud	0	0	0	0	0	0	0	0	0	0	0	0	1	5	6	6	13	10	7	46	22	16	9	6	2	2	2	5	1	23	48	23	12	0	0	2	1	3	2	16
Mid cloud	67	5	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	29	2	24	47	57	99	99	100	100	100	100	100	100	100	100
High cloud	53	5	0	0	0	0	0	0	0	0	8	35	31	31	34	41	21	3	1	2	38	66	94	97	89	92	39	98	56	93	37	53	71	46	24	80	18	37	45	70
Sun & Moon
Temperature °C	20	20	20	19	19	19	19	19	18	18	18	18	18	18	18	19	21	22	23	23	23	23	24	23	23	22	21	21	21	21	21	21	21	21	21	22	22	22	21	21
Dew point °C	13	12	12	11	11	10	10	10	11	10	10	10	11	11	12	13	15	14	14	14	15	15	14	14	15	15	15	15	15	15	15	15	15	15	15	15	15	16	16	17
Wind km/h	18	17	16	17	18	18	23	24	22	20	19	19	17	16	18	17	20	25	28	32	32	31	30	32	33	30	31	29	27	24	24	25	28	28	27	26	26	26	24	24
Rain (mm)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Cloud cover0–9%10–24%25–44%45–64%65–84%85–100%

SkyDaylightCivil twilightNautical twilightAstronomical twilightDark

Sun altitudeMoon altitude12dew risk (within 2° of the dew point)Scroll sideways for the next 40 hours →

Weather data: MET Norway (CC BY 4.0)

Next 7 nights

Average cloud during each night's dark hours, with the Moon. The first two to three nights use hourly data; later nights use MET Norway's 6-hourly steps and are less certain.

Tonight2 Oct
10%Clear
61% · 2 h 30 min moon-free
19:40–05:06
Sat3 Oct
97%Cloudy
49% · 3 h 40 min moon-free
19:38–05:07
Sun4 Oct
23%Clear
38% · 4 h 50 min moon-free
19:37–05:08
6-hourly data
Mon5 Oct
46%Partly cloudy
27% · 6 h moon-free
19:36–05:08
6-hourly data
Tue6 Oct
4%Clear
18% · 7 h 10 min moon-free
19:34–05:09
6-hourly data
Wed7 Oct
0%Clear
10% · 8 h 20 min moon-free
19:33–05:10
6-hourly data
Thu8 Oct
1%Clear
5% · 9 h 20 min moon-free
19:32–05:11
6-hourly data

Sun & twilight

Twilight ends in three steps. Faint galaxies and the Milky Way need astronomical darkness, when the Sun is more than 18° below the horizon.

Sunset: 18:17
Civil dusk (−6°): 18:42
Nautical dusk (−12°): 19:11
Astronomical dusk (−18°): 19:40
Astronomical dawn (−18°): 05:06
Nautical dawn (−12°): 05:35
Civil dawn (−6°): 06:04
Sunrise: 06:29

Dark window: 19:40 – 05:06 GMT+9 (9 h 27 min)

The Moon

Waning Gibbous

Illuminated: 61%
Age: 20.6 days
Moonrise: 22:09
Moonset: 12:27
Moon-free dark time: 2 h 30 min

Next phases

Last QuarterSat 3 Oct22:25
New MoonSun 11 Oct00:50
First QuarterMon 19 Oct01:13
Full MoonMon 26 Oct13:12

Next lunar eclipse visible here: Partial · Fri 7 Jul 2028, 03:19 · Moon 21° up
Next solar eclipse visible here: Partial · Sat 1 Jun 2030, 17:06 · 52% of the Sun covered

Planets tonight

Naked-eye planets that climb more than 10° above the horizon during the astronomically dark hours.

Altitude through the night

Planets tonight — Jeju
Planet	Rises	Transits (altitude)	Sets	Best seen tonight	Brightness	In
JupiterVisible	02:33	09:17 · 72°	16:04	03:30–05:06, E	mag -1.9	Leo
SaturnVisible	18:27	00:34 · 59°	06:41	19:40–05:06, S	mag 0.2	Cetus
MarsVisible	01:08	08:08 · 77°	15:10	02:10–05:06, E	mag 1.1	Cancer
Venus	08:57	14:04 · 35°	19:07	Below 10°	mag -4.7	Virgo
Mercury	08:24	13:47 · 42°	19:12	Below 10°	mag -0.1	Virgo

Lower magnitude = brighter. Venus and Jupiter outshine every star.

Sky events — next 90 days

Moon phases, seasons, planet highlights and eclipses, with times for this city.

Oct4Sun
Planet · 21:12
Saturn at opposition
Saturn is opposite the Sun: up all night, and at its closest and brightest for the year.
Oct11Sun
Moon · 00:50
New Moon
Darkest skies of the month for galaxies and the Milky Way.
Oct12Mon
Planet · 19:06
Mercury at greatest evening elongation
25° from the Sun — the best evening view of Mercury, low in the west after sunset.
Oct26Mon
Moon · 13:12
Full Moon
Bright moonlight all night; best for the Moon itself.
Oct29Thu
Moon · 03:04
Moon at perigee near full (a “supermoon”)
Closest to Earth this month: 364,397 km.
Nov9Mon
Moon · 16:02
New Moon
Darkest skies of the month for galaxies and the Milky Way.
Nov24Tue
Moon · 23:54
Full Moon
Bright moonlight all night; best for the Moon itself.
Nov26Thu
Moon · 06:02
Moon at perigee near full (a “supermoon”)
Closest to Earth this month: 359,335 km.
Dec9Wed
Moon · 09:52
New Moon
Darkest skies of the month for galaxies and the Milky Way.
Dec22Tue
Season · 05:50
Winter solstice
The longest night of the year — the most hours of darkness.
Dec24Thu
Moon · 10:28
Full Moon
Bright moonlight all night; best for the Moon itself.
Dec24Thu
Moon · 17:32
Moon at perigee near full (a “supermoon”)
Closest to Earth this month: 356,641 km.

Quick answers

Will it be clear for stargazing in Jeju tonight?: Clear until about 03:00, then cloudier; the Moon (61% lit) rises at 22:09. That is the hourly total-cloud forecast for Jeju, South Korea on the night of 2 October 2026, read inside the darkest hours: under 25% cloud counts as clear and 65% or more as cloudy. Most of the cloud is high and thin, which dims faint objects rather than hiding the sky.
When does it get dark in Jeju tonight?: In Jeju, South Korea on the night of 2 October 2026, astronomical darkness begins at 19:40 and lasts until 05:06 GMT+9 — 9 h 27 min of fully dark sky. The Sun sets at 18:17, and nautical twilight ends at 19:11.
Is the Moon up tonight in Jeju?: On the night of 2 October 2026 in Jeju, South Korea, the Moon is a waning gibbous, 61% illuminated. It sets at 12:27 and rises at 22:09, GMT+9. 2 h 30 min of the dark window is moon-free.
Which planets can I see from Jeju tonight?: From Jeju, South Korea on the night of 2 October 2026: Mars (02:10–05:06, highest 48° in the E at 05:06, magnitude 1.1); Jupiter (03:30–05:06, highest 31° in the E at 05:06, magnitude -1.9); Saturn (19:40–05:06, highest 59° in the S at 00:30, magnitude 0.2). Times are GMT+9; all are visible to the naked eye.

Forecast details

Location: 33.510° N, 126.522° E
Elevation: 19 m
Time zone: Asia/Seoul (GMT+9)
Weather model: MET Norway Locationforecast 2.0
Forecast issued: 2 Oct, 01:20 UTC
Next update expected: ≈ 2 Oct, 04:45 UTC
Page generated: 2 Oct, 04:13 UTC
Astronomy: Computed with astronomy-engine for these coordinates

Computed for 33.510° N, 126.522° E, elevation 19 m, time zone Asia/Seoul. City centres are light-polluted; the times here apply anywhere within about 50 km, so drive out to darker skies.

Sun, Moon and planet positions are calculated with astronomy-engine. Twilight uses the Sun's geometric centre; sunrise and sunset use the upper limb with standard refraction.

The summary line restates the hourly total-cloud forecast inside the dark window (clear under 25%, cloudy from 65%) and the Moon's times. It is not a score — the Tonight score lives in the app.

Seeing and transparency forecasts are coming to the app first (North America via Environment Canada's model, a worldwide beta elsewhere).

Nearby city forecasts

All forecasts in South Korea Moon phase calendar Telescope FOV calculator

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