Moon Phase on September 13, 2026: Information about the Lunar Cycle

On September 8, 2026, the Moon was in the waning phase, showing 10% visibility. The complete calendar of lunar phases for September 2026 was released by the National Institute of Meteorology (Inmet).

The lunar phases in September 2026 began on the 4th with the Waning Moon at 04:52 AM Brasília time. Subsequently, the New Moon occurred on the 11th at 00:27 AM. The Waxing Moon appeared on the 18th at 17:44 PM, and the Full Moon was predicted for the 26th at 13:50 PM.

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 the 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), and the gibbous waning and the last quarter (located between the full and waning phases).

During the New Moon phase, the satellite is positioned between the Earth and the Sun. This results in only the side illuminated towards 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 linked to renewal and new opportunities.

After the New Moon, the Waxing phase begins. Slowly, a thin illuminated band starts to be observed in the sky, progressively increasing each night. Initially, only a faint arc of light is visible, 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.

During the Full Moon phase, the Earth is located between the Sun and the Moon. This configuration allows the entire lunar face facing the Earth 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 point.

After the Full Moon, the lunar luminosity begins to gradually decline. Each night, a decrease in the illuminated surface is observed. 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 symbolizes reflection, closure, and preparation for subsequent beginnings.

On September 4, 2026, the Moon was in the first stage of the waning phase, showing 50% visibility. The complete calendar of lunar phases for September 2026 was released by the National Institute of Meteorology (Inmet).

The lunar phases for September 2026 began this Friday (the 4th) with the arrival of the Waning Moon, recorded at 04:52 AM Brasília time. Subsequently, the New Moon will occur on the 11th at 00:27 AM. The Crescent phase will appear on the 18th at 17:44 PM, and the Full Moon will be seen on the 26th at 13:50 PM.

A lunar cycle, also known as a 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 the four main phases—new, crescent, full, and waning—with each phase lasting approximately seven days.

In addition to these main phases, there are so-called 'interphases': the quarter crescent and the gibbous crescent (located between the new and full phases), and the gibbous waning and the quarter waning (located between the full and waning phases).

Details about Lunar Phases

During the New Moon phase, the satellite is positioned between the Earth and the Sun. This results in only the side illuminated towards 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 linked to renewal and new opportunities.

After the New Moon, the Crescent phase begins. Slowly, a small illuminated band starts to appear in the sky, intensifying night after night. Initially, only a thin arc of light is observed, but as the days advance, the illuminated area increases until half of the Moon is visible, a moment called Quarter Crescent. This stage symbolizes 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 radiant 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 point.

After the Full Moon, the lunar luminosity begins to decline progressively. Each night, a smaller portion of its illuminated surface becomes visible. When half of it is visible, the Quarter Waning occurs, which is the opposite of the Quarter Crescent. 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 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.