Moon Phase Today: What the Moon Looks Like on October 12 2026

Look up tonight and you’ll spot just a sliver of silver skimming the western horizon – that’s the Moon in its waxing‑crescent phase, only about 3 % illuminated.

According to NASA’s Daily Moon Guide, the tiny curve will grow a little each evening, inching toward a brighter night over the next week. By the time you’re reading this, the Moon will have added another speck of light, and the trend will keep up until the full Moon lights up the sky around October 25 or 26, depending on where you live.

Why does the Moon keep changing? It’s all about geometry. The Moon orbits Earth roughly every 29.5 days, and as it moves, the angle between the Sun, Earth, and Moon shifts. That shift determines how much of the Sun‑lit side we can see, creating the familiar cycle of lunar phases.

Here’s a quick rundown of the eight classic phases, phrased in plain English:

New Moon – The Moon sits between Earth and the Sun, so the side facing us is dark. You can’t see it without a telescope.

Waxing Crescent – A thin sliver appears on the right side (for observers in the Northern Hemisphere). That’s what we have tonight.

First Quarter – Half of the Moon is illuminated on the right side, looking like a perfect half‑circle.

Waxing Gibbous – More than half is lit, but it’s not quite full yet.

Full Moon – The entire face glows, fully illuminated by the Sun.

Waning Gibbous – Light starts receding on the right side after the full Moon.

Third (Last) Quarter – The opposite half‑Moon, with the left side illuminated.

Waning Crescent – A thin sliver on the left side before the cycle resets.

So, if you’re planning a night walk or a photo‑session tonight, aim for that thin crescent low in the west after sunset. In a week or two, you’ll be treated to a much brighter, fuller view – just keep an eye on the calendar for the upcoming full Moon around the end of October.