September 20, 2025 Current Southern Hemisphere/Tomorrow’s Northern Hemisphere Moon Phase

You can find more moon phase details on both of the websites used in this post by clicking on the hyperlink.

Source: nineplanets.org

The Moon phase for September 20th, 2025 is a Waning Crescent phase. This is the phase where the moon is less than 50% illuminated but has not yet reached 0% illumination (which would be a New Moon).

In this part of the moon cycle, it is getting closer and closer to the Sun as viewed from Earth and the night side of the Moon is facing earth with a decreasingly thin crescent being illuminated.

The waning (shrinking) crescement Moon will rise at around midnight, transit the meridian after sunrise, before setting after noon. This phase is best viewed 1-2 hours before sunrise and is a great time to see the features of the Moon’s surface. Along the illuminated crescent you can see the craters and mountains of the moon casting long shadows.

Assuming it’s a clear night, the Waxing Gibbous moon will then be visible through most of the night before setting just before sunrise.

Fun fact:

 Phase Details

Phase: Waning Crescent

Moon age: 27.98 days

Moon illumination: 2.49%

Moon tilt: -23.034°

Moon angle: 0.51

Moon distance: 392,128.14 km

Moon sign: Virgo

Source: MoonGiant.com

You can use this link to go forward or backward in time for Moon phase information. If you are curious, you can even find out what phase the Moon was in when you or anyone else was born.

This phase is best viewed just before the sunrise in the western sky.  During this part of the Moon cycle, the Moon is getting closer to the Sun as viewed from Earth and the night side of the Moon is facing the Earth with only a small edge of the Moon being illuminated. It can also be a great time to see the features of the Moon’s surface. Along the edge where the illuminated portion meets the dark side, the craters and mountains cast long shadows making them easier to observe with a telescope or binoculars.

Today’s Waning Crescent Phase

The Waning Crescent on September 20 has an illumination of 1%. This is the percentage of the Moon illuminated by the Sun. The illumination is constantly changing and can vary up to 10% a day. On September 20 the Moon is 28.47 days old. This refers to how many days it has been since the last New Moon. It takes 29.53 days for the Moon to orbit the Earth and go through the lunar cycle of all 8 Moon phases.

Phase Details