How to Observe the Moon's Phases, With October 2026's Hunter's Moon as a Guide

Search interest in the Moon spikes every few weeks, and this October it is driven by the Hunter's Moon, the full moon that follows the Harvest Moon in the northern hemisphere. According to NASA's Moon Phases page and skywatching guide Star Walk, the October 2026 full moon reaches its peak illumination at 04:12 GMT/UTC on Monday, October 26, 2026 — 12:12 a.m. Eastern Daylight Time. The Old Farmer's Almanac lists the same exact moment.

Why the Moon has phases

NASA's Moon Phases page explains that the Sun always illuminates half of the Moon while the other half stays dark. What changes is how much of that lit half faces Earth as the Moon travels around our planet. That changing geometry — not clouds or shadows from Earth — is what produces the familiar cycle of crescents, quarters and gibbous shapes.

The full cycle, from one new moon to the next, is called a synodic month and lasts about 29.5 days, per NASA. This is slightly longer than the Moon's actual orbital period around Earth (the sidereal month, about 27.3 days) because Earth itself keeps moving around the Sun, so the Moon needs roughly two extra days to realign with the Sun as seen from Earth.

The eight phases, in order

NASA lists the eight lunar phases in sequence: new Moon, waxing crescent, first quarter, waxing gibbous, full Moon, waning gibbous, third quarter, and waning crescent. 'Waxing' means the illuminated portion is growing night to night; 'waning' means it is shrinking.

Why October's full moon is called the Hunter's Moon

The Old Farmer's Almanac traces the name to the seasonal shift from harvesting crops to preparing meat for winter: by this point in autumn, fields are typically cleared and leaves have fallen, making animals easier to spot in open landscapes, while the bright moon rising soon after sunset gave hunters extra evening light to track game. The Almanac also lists alternative names used by different communities for the same October full moon, including the Drying Rice Moon (Dakota), Falling Leaves Moon (Anishinaabe), Freezing Moon or Ice Moon (Ojibwe and Haida), and Migrating Moon (Cree).

Star Walk notes that although the Moon reaches exact fullness at 04:12 GMT/UTC on October 26, it will look essentially full — bright and round — for about three nights, from roughly October 25 to 27, so there is no need to watch at the precise minute of peak illumination.

How and when to actually look at it

NASA's Moon Viewing Tips page recommends observing phases other than full for the clearest surface detail, because the terminator — the line dividing lunar day from lunar night — casts long shadows across craters and mountains, making them easier to pick out. During a full moon itself, that contrast disappears since the entire visible face is lit at once.

Star Walk and the Almanac both point to moonrise, shortly after sunset, as a good viewing window; Star Walk notes that near the horizon the Moon can take on a gold, orange or reddish tint because its light passes through a thicker layer of Earth's atmosphere than when the Moon is higher in the sky.

Observers may also notice the Moon looking unusually large next to trees or buildings when it is low on the horizon. Star Walk attributes this to the Moon illusion, a perceptual effect of the brain comparing the Moon to nearby objects — the Moon's actual size and distance do not change.

• Naked eye: distinguishes the darker maria (old volcanic plains) from brighter highlands, and can pick out large craters such as Copernicus, Tycho and Aristarchus along with their bright ray systems, per NASA.
• Binoculars: NASA suggests at least 7x magnification; higher magnifications (10x–15x) show more crater detail but may require a tripod to hold steady.
• Telescope: reveals mountain ranges, crater chains, valleys and rilles (cracks left by cooling lava), according to NASA.

What comes after the Hunter's Moon

Following the October cycle, the Moon moves into its waning gibbous and waning crescent phases before the next new moon, restarting the roughly 29.5-day cycle toward November's full moon. The Almanac's full-moon calendar lists the Beaver Moon as November's name in northern hemisphere tradition, with that occurrence classified as a supermoon in the Almanac's broader 2026 coverage — a designation not applied to October's Hunter's Moon.