Moon Phase Calendar for September 2026 with Dates and Times

On August 30, 2026, the Moon will be in the full phase and will have 96% visibility. The National Institute of Meteorology (Inmet) has made available the complete calendar of lunar phases for this month.

The lunar phases for August 2026 began on the 5th with the Waning Moon at 11:22 PM Brasília time. Subsequently, the New Moon occurred on the 12th at 2:37 PM. The Waxing Moon appeared on the 19th at 11:46 PM, and the Full Moon was recorded on Friday, the 28th, at 1:19 AM.

A lunar cycle, also known as lunation, refers to the time interval between two new moons and has an average duration of 29.5 days. During this period, the Moon passes through four main phases: new, waxing, full, and waning, with each phase lasting approximately seven days.

In addition to these main phases, there are so-called 'interphases,' which include the first quarter and the gibbous crescent (located between the new and full phases), as well as the waning gibbous and the last quarter (between the full and waning phases).

Details of the Lunar Phases

During the New Moon phase, the satellite is positioned between the Earth and the Sun. This results in only the side illuminated by the Sun facing the Sun, while the dark side faces us, making the Moon invisible in the night sky. This phase signals the beginning of a new lunar cycle and is associated with renewal and new opportunities.

After the New Moon, the Waxing phase begins. Slowly, a small illuminated band starts to be observed in the sky, progressively increasing each night. Initially, only a thin arc of light is perceived, but as the days advance, the illuminated area grows until it reaches half of the Moon, a moment called First Quarter. This phase represents development, growth, and the building of new paths.

In the Full Moon phase, the Earth is located between the Sun and the Moon. This configuration allows the entire lunar face facing us to receive complete illumination, making it fully visible and bright in the firmament. This is the period of maximum luminous intensity, occurring when the Moon rises on the horizon simultaneously with sunset. The Full Moon is associated with fullness, the peak of processes, and energy at its highest level.

After the Full Moon, the lunar luminosity begins to gradually decline. Each night, the illuminated portion of the surface decreases. When half of the Moon is visible, the Last Quarter occurs, which is the opposite of the First Quarter. The Moon continues to lose brightness until it returns to the New Moon, restarting the cycle. The Waning phase symbolizes reflection, closure, and preparation for subsequent beginnings.

Currently, the Moon is in the Full phase.

On August 28, 2026, the Moon reached the first day of the full phase, appearing completely visible. The complete calendar of lunar phases for August 2026 was released by the National Institute of Meteorology (Inmet).

The lunar cycle in August began with the Waning Moon on the 5th at 11:22 PM Brasília time. Subsequently, the New Moon occurred on the 12th at 2:37 PM. The Waxing Moon appeared on the 19th at 11:46 PM, culminating in the Full Moon this Friday, the 28th, at 1:19 AM.

A lunar cycle, also known as a lunation, is a time interval that varies slightly, averaging 29.5 days. During this period, the Moon passes through the four main phases—new, waxing, full, and waning—with each phase lasting approximately seven days. Additionally, there are intermediate phases, such as the first quarter and gibbous waxing (between new and full), and gibbous waning and last quarter (between full and waning).

During the New Moon phase, the satellite is positioned between the Earth and the Sun. This results in only the side illuminated by the Sun facing away from us, while the dark side faces us, making the Moon invisible in the night sky. This phase signals the beginning of a new lunar cycle, associated with renewal and new opportunities.

After the New Moon, the Waxing phase begins. A thin band of light starts to appear progressively in the sky, increasing every night. Initially, only a faint arc is visible, but as the days advance, the illuminated area grows until half of the Moon is visible, a stage called First Quarter. This phase symbolizes development, growth, and the building of new paths.

During the Full Moon phase, the Earth is located between the Sun and the Moon. This configuration allows the entire lunar face facing us to receive complete illumination, making it bright and fully visible in the sky. This is the period of maximum luminous intensity, occurring when the Moon rises on the horizon simultaneously with sunset. The Full Moon is linked to fullness, the peak of processes, and energy at its highest point.

After the Full Moon, the lunar luminosity begins to gradually decline. Each night, the illuminated portion decreases. When half of the Moon is visible, the Last Quarter occurs, which is the opposite of the First Quarter. The Moon continues to lose brightness until it returns to the New Moon, thus restarting the cycle. The Waning phase represents reflection, conclusion, and preparation for subsequent beginnings.

On August 21, 2026, the Moon is in the waxing phase and is illuminated by 67%. According to data from the National Meteorological Institute (Inmet), a full calendar of lunar phases for this month is available.

The lunar phases in August 2026 began on the 5th with a waning Moon at 23:22 Brazilian time. This was followed by the New Moon on the 12th at 14:37. The Waxing Moon appeared on the 19th at 23:46, and the Full Moon is scheduled for the 28th at 01:19.

A lunation, or lunar cycle, is the period between new moons, which has an average duration of 29.5 days. During this period, the Moon goes through four main phases: new, waxing, full, and waning, with each phase lasting approximately seven days.

There are also intermediate phases: the waxing crescent and waxing gibbous, which are observed between the new and full Moons; as well as the waning gibbous and waning quarter between the full and new Moons.

Description of Main Phases

During the New Moon, the satellite is located between the Earth and the Sun. This results in the illuminated side of the Moon facing the Sun, while the dark side faces us. Because of this, the Moon is not visible in the night sky. This phase marks the beginning of a new lunar cycle and is associated with renewal and new opportunities.

After the New Moon comes the Waxing Moon phase. Gradually, a small illuminated strip begins to appear in the sky, which increases every night. Initially, only a thin ray of light is visible, but as the days pass, the illuminated part grows until half of the Moon becomes visible, which is called the Waxing Quarter. This phase symbolizes growth, development, and building new paths.

During the Full Moon, the Earth is located between the Sun and the Moon. This allows the side of the Moon facing us to receive full light, making it completely visible and bright in the sky. This is a period of maximum light intensity, when the Moon rises exactly at sunset. The Full Moon is associated with completeness, the culmination of processes, and peak energy.

After the Full Moon, the Moon's light gradually begins to fade. Every night, we see less and less illuminated surface. When only half is visible, the Waning Quarter occurs, which is the opposite of the Waxing Quarter. The Moon continues to lose brightness until it reaches the New Moon again, restarting the cycle. The waning phase symbolizes reflection, completion, and preparation for new beginnings.

Currently, the Moon is in the waxing phase.