Moon phase for October 4, 2026: Waning Crescent at 42% visibility

The Moon is in the Waning Crescent phase on October 4, 2026, with 42% of its surface visible, according to NASA's Daily Moon Guide. It will continue to darken as it approaches the New Moon. Observers can see the Oceanus Procellarum, Kepler Crater, and Tycho Crater with the naked eye, while binoculars reveal the Grimaldi Basin and Mare Humorum. A telescope is needed for the Apollo 14 landing site and Schiller Crater. The next Full Moon is expected on October 25 or 26, depending on timezone. Moon phases result from the Moon's 29.5-day orbit, with visibility determined by its position relative to Earth and the Sun.