Moon on Tue, August 12, 2025

8/11Tue8/13

Lunar Leap 6/19

The Moon on this date is Waning Gibbous, with about 91% of its disk illuminated.

Watch this night's MoonWaning Gibbous“A slightly diminished light rising late”

Illumination

91%

Moonrise

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Moonset

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Moonrise and moonset are for Seoul. Moonset is when the Moon that rose this day sets, so it can fall on the next day.

See the August 2025 Moon calendar and major phase times →

Perseids meteor shower

A reason to stay out a little longer on a summer night.

Around this time each year · estimated peak window

Moonlight will share the predawn sky.

When and how to watch

Find a dark location and watch a wide area of sky with unaided eyes.

Typical peak 2025-08-12–2025-08-14 · approximate annual window, not a year-specific forecast.

Seoul estimate · Korea Standard Time (KST)

Predawn candidate 8/12, 04:00 · watch a wide area of sky.

Moon illumination 93% · the Moon is up and may hide faint meteors.

Clouds and light pollution affect actual visibility.

Check IMO annual meteor forecasts

Moon near Saturn

Let the Moon be your guide to Saturn.

Viewing candidate 8/12, 23:30 · SE · altitude about 25° · Seoul estimate · Korea Standard Time (KST)

When and how to watch

The Moon and Saturn appear close together in our sky; they are not physically close.

Closest approach 8/12, 21:01 KST · 3.6° geocentric separation

Seoul estimate · Korea Standard Time (KST)

Viewing candidate 8/12, 23:30 · SE · altitude about 25°

Clouds and light pollution affect actual visibility.

Past full, it rises later in the evening and remains bright toward dawn.

The Moon on August 12, 2025

On August 12, 2025, the Moon was a waning gibbous, 18.3 days old and 91% illuminated, in the constellation Pisces about 371,664 km (230,941 mi) from Earth. The next New Moon followed on August 23, 2025.

Phase: Waning Gibbous
Illumination: 91%
Moon age: 18.3 days since New Moon
Distance from Earth: 371,664 km (230,941 mi)
Constellation: Pisces
Previous Full Moon: August 9, 2025
Next New Moon: August 23, 2025
Next Full Moon: September 7, 2025

Moon phases around August 12, 2025

Moon phase, illumination and age for the three days before and after August 12, 2025
Date	Moon	Lit	Age
8/9 Sat	Full Moon	100%	15.3d
8/10 Sun	Waning Gibbous	99%	16.3d
8/11 Mon	Waning Gibbous	96%	17.3d
8/12 Tue	Waning Gibbous	91%	18.3d
8/13 Wed	Waning Gibbous	83%	19.3d
8/14 Thu	Waning Gibbous	73%	20.3d
8/15 Fri	Waning Gibbous	63%	21.3d

Values are calculated with Astronomy Engine at 12:00 Korea Standard Time (03:00 UTC) on each date; New and Full Moon dates are in UTC. Moon age counts days since the New Moon; distance is centre to centre.

OH MY LUNA