New Moon
August 18, 2031
04:32 AM UTC UTC in Leo
New Moon in LeoLunation Calendar
Moon Phases August 2031: New Moon, Full Moon & Signs
Moon phases for August 2031 with calculated UTC times and zodiac signs. New Moon: August 18, 2031 at 04:32 AM UTC in Leo. Full Moon: August 3, 2031 at 01:46 AM UTC in Aquarius. The month view below also tracks Moon sign ingresses and local-time conversions.
Key Dates
New Moon and Full Moon in August 2031
Full Moon
August 3, 2031
01:46 AM UTC UTC in Aquarius
Full Moon in AquariusCalculation Basis
Hermetikon calculates these lunar timings from its astronomy engine and stores the canonical moments in UTC. They are Hermetikon reference timings, not Swiss Ephemeris output; local times are derived from the UTC moment.
Local personalization
Local timing for the August 2031 moon calendar
The calendar stays canonical in UTC for search, citations, and stable reference. Apply your own coordinates here to convert featured moments into local time and add local ascendant and planetary-hour context.
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Current moon
August 2031 lunar calendar
Use this panel to personalize the August 2031 calendar.
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Planetary hour
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Times appear after a location is applied.
Featured local timings
Full Moon in Aquarius
Aug 3, 2031, 1:46 AM UTC
Canonical dates stay in UTC, but this panel converts them to your browser timezone.
Last Quarter in Taurus
Aug 10, 2031, 12:24 AM UTC
Canonical dates stay in UTC, but this panel converts them to your browser timezone.
New Moon in Leo
Aug 18, 2031, 4:32 AM UTC
Canonical dates stay in UTC, but this panel converts them to your browser timezone.
First Quarter in Sagittarius
Aug 25, 2031, 6:40 PM UTC
Canonical dates stay in UTC, but this panel converts them to your browser timezone.
Lunar Phase Events
Full Moon
in AquariusDateAugust 3, 2031
Time (UTC)01:46 AM UTC
Local: Aug 3, 2031, 1:46 AM UTC
SignAquarius
The Moon stands in opposition to the Sun, achieving maximum illumination. Classical doctrine treats the Full Moon as a peak of lunar expression - the Moon is fully lit, powerful, and separated from the Sun by the widest arc.
Full Moon in AquariusLast Quarter
in TaurusDateAugust 10, 2031
Time (UTC)12:24 AM UTC
Local: Aug 10, 2031, 12:24 AM UTC
SignTaurus
The Moon stands in its third square to the Sun, now waning and decreasing in light. Classical doctrine marks this as a moment of release, clearing, and dissolution as the cycle moves toward its end.
Last Quarter in TaurusNew Moon
in LeoDateAugust 18, 2031
Time (UTC)04:32 AM UTC
Local: Aug 18, 2031, 4:32 AM UTC
SignLeo
The Moon conjoins the Sun, becoming invisible and combust. Classical doctrine regards this as the weakest lunar condition - the Moon is without light, applying to the Sun, and incapable of reflecting its rays.
New Moon in LeoFirst Quarter
in SagittariusDateAugust 25, 2031
Time (UTC)06:40 PM UTC
Local: Aug 25, 2031, 6:40 PM UTC
SignSagittarius
The Moon stands in square (quartile) to the Sun, having completed one quarter of its synodic cycle. Classical doctrine marks this as a moment of tension, decision, and action - the Moon's will presses against the solar principle.
First Quarter in SagittariusDaily Moon Lookup - August 2031
Each row uses a noon UTC reference for the daily phase and Moon sign. Major lunations and sign ingresses keep their calculated UTC moments.
| Date | Phase | Moon Sign | Calculated Events |
|---|---|---|---|
| August 1 | Waxing Gibbous96% illuminated | Capricornnoon UTC reference | No major lunation or sign ingress. |
| August 2 | Waxing Gibbous99% illuminated | Aquariusnoon UTC reference | |
| August 3 | Full Moon100% illuminated | Aquariusnoon UTC reference | |
| August 4 | Full Moon97% illuminated | Piscesnoon UTC reference | |
| August 5 | Full Moon92% illuminated | Piscesnoon UTC reference | No major lunation or sign ingress. |
| August 6 | Waning Gibbous84% illuminated | Ariesnoon UTC reference | |
| August 7 | Waning Gibbous75% illuminated | Ariesnoon UTC reference | No major lunation or sign ingress. |
| August 8 | Waning Gibbous65% illuminated | Ariesnoon UTC reference | |
| August 9 | Waning Gibbous55% illuminated | Taurusnoon UTC reference | No major lunation or sign ingress. |
| August 10 | Last Quarter45% illuminated | Taurusnoon UTC reference | |
| August 11 | Last Quarter36% illuminated | Gemininoon UTC reference | |
| August 12 | Last Quarter27% illuminated | Gemininoon UTC reference | No major lunation or sign ingress. |
| August 13 | Last Quarter19% illuminated | Gemininoon UTC reference | |
| August 14 | Waning Crescent12% illuminated | Cancernoon UTC reference | No major lunation or sign ingress. |
| August 15 | Waning Crescent7% illuminated | Cancernoon UTC reference | No major lunation or sign ingress. |
| August 16 | Waning Crescent3% illuminated | Leonoon UTC reference | |
| August 17 | Waning Crescent0% illuminated | Leonoon UTC reference | No major lunation or sign ingress. |
| August 18 | New Moon0% illuminated | Leonoon UTC reference | |
| August 19 | New Moon2% illuminated | Virgonoon UTC reference | No major lunation or sign ingress. |
| August 20 | New Moon5% illuminated | Virgonoon UTC reference | No major lunation or sign ingress. |
| August 21 | New Moon11% illuminated | Libranoon UTC reference | |
| August 22 | Waxing Crescent18% illuminated | Libranoon UTC reference | No major lunation or sign ingress. |
| August 23 | Waxing Crescent26% illuminated | Scorpionoon UTC reference | |
| August 24 | Waxing Crescent36% illuminated | Scorpionoon UTC reference | No major lunation or sign ingress. |
| August 25 | Waxing Crescent47% illuminated | Scorpionoon UTC reference | |
| August 26 | First Quarter58% illuminated | Sagittariusnoon UTC reference | No major lunation or sign ingress. |
| August 27 | First Quarter69% illuminated | Sagittariusnoon UTC reference | |
| August 28 | First Quarter79% illuminated | Capricornnoon UTC reference | No major lunation or sign ingress. |
| August 29 | Waxing Gibbous88% illuminated | Capricornnoon UTC reference | |
| August 30 | Waxing Gibbous95% illuminated | Aquariusnoon UTC reference | No major lunation or sign ingress. |
| August 31 | Waxing Gibbous99% illuminated | Aquariusnoon UTC reference |
Month View Calendar - August 2031
Each day shows the Moon sign at noon UTC, any major phase event, and calculated UTC Moon sign ingresses. Use the personalization panel above for local-time conversion and location-specific context.
Sun
Mon
Tue
Wed
Thu
Fri
Sat
18
25
Moon Sign Runs
A compact view of how the Moon moves through the zodiac across the month.
Moon Sign Ingresses
These are the calculated UTC sign changes for the Moon in August 2031, with local-time conversion shown below each ingress.
August 2, 2031 at 09:05 AM UTC UTC
Local time: Aug 2, 2031, 9:05 AM UTC
The Moon leaves Capricorn and enters Aquarius.
August 4, 2031 at 08:40 AM UTC UTC
Local time: Aug 4, 2031, 8:40 AM UTC
The Moon leaves Aquarius and enters Pisces.
August 6, 2031 at 10:20 AM UTC UTC
Local time: Aug 6, 2031, 10:20 AM UTC
The Moon leaves Pisces and enters Aries.
August 8, 2031 at 03:47 PM UTC UTC
Local time: Aug 8, 2031, 3:47 PM UTC
The Moon leaves Aries and enters Taurus.
August 11, 2031 at 01:22 AM UTC UTC
Local time: Aug 11, 2031, 1:22 AM UTC
The Moon leaves Taurus and enters Gemini.
August 13, 2031 at 01:40 PM UTC UTC
Local time: Aug 13, 2031, 1:40 PM UTC
The Moon leaves Gemini and enters Cancer.
August 16, 2031 at 02:28 AM UTC UTC
Local time: Aug 16, 2031, 2:28 AM UTC
The Moon leaves Cancer and enters Leo.
August 18, 2031 at 02:15 PM UTC UTC
Local time: Aug 18, 2031, 2:15 PM UTC
The Moon leaves Leo and enters Virgo.
August 21, 2031 at 12:22 AM UTC UTC
Local time: Aug 21, 2031, 12:22 AM UTC
The Moon leaves Virgo and enters Libra.
August 23, 2031 at 08:35 AM UTC UTC
Local time: Aug 23, 2031, 8:35 AM UTC
The Moon leaves Libra and enters Scorpio.
August 25, 2031 at 02:30 PM UTC UTC
Local time: Aug 25, 2031, 2:30 PM UTC
The Moon leaves Scorpio and enters Sagittarius.
August 27, 2031 at 05:47 PM UTC UTC
Local time: Aug 27, 2031, 5:47 PM UTC
The Moon leaves Sagittarius and enters Capricorn.
August 29, 2031 at 06:52 PM UTC UTC
Local time: Aug 29, 2031, 6:52 PM UTC
The Moon leaves Capricorn and enters Aquarius.
August 31, 2031 at 07:08 PM UTC UTC
Local time: Aug 31, 2031, 7:08 PM UTC
The Moon leaves Aquarius and enters Pisces.
Classical Sources on Monthly Lunations
These citations explain why classical astrologers tracked monthly new and full moons, quarterly turns, and conjunction-based month judgments.
Tetrabiblos
Claudius Ptolemy
150
"The second part of the consideration relates to each month, and requires a similar observation of the new or full Moon first taking place on the Sun’s progress through each sign: and it must be remembered, that, if a new Moon should have happened at a period nearest to the Sun’s transit over the past tropical or equinoctial point, the new Moon also in each succeeding sign, until the commencement of the next quarter, are to be observed; but, if a full Moon should have so happened, then similar observation is to be made of each subsequent full Moon. The angles, also, must be duly attended to, as well as the planets and stars ruling in both the places [104] ; and especially the nearest phases, applications, and separations of the planets, and their properties. The peculiar qualities of the two places, and the winds, liable to be excited by the planets themselves and by those parts of the signs in which they may be situated, are likewise to be considered; and also that particular wind, which is indicated by the direction of the Moon’s ecliptical latitude. By the aid of these observations, and by weighing and comparing the existing vigour of each of the several properties and qualities, the general constitution of the atmosphere during each month may be predicted"
CHAPTER XIII MODE OF CONSIDERATION FOR PARTICULAR CONSTITUTIONS OF THE ATMOSPHEREOpen in Reader
Tetrabiblos
Claudius Ptolemy
150
"The third part of this consideration appertains to significations applying more minutely, and points out their force or weakness. In this case, the partile configurations of the Sun and Moon, at the intermediate quarters, as well as at the new or full Moon, are to be attentively regarded; since there is a certain variation in the constitution of the atmosphere, which usually commences about three days before, and sometimes, also, about three days after the Moon has equated her course to the Sun"
CHAPTER XIII MODE OF CONSIDERATION FOR PARTICULAR CONSTITUTIONS OF THE ATMOSPHEREOpen in Reader
Clavis Astrologiae Elimata
Henry Coley
1669
"When you shall make the minute of a ☌ your Basis or Radix, you may give judgment of the change of Weather in that moneth; for your judgment shall be framed according to the principal Dominator of the Angle of every Figure, for that Planet overcomes in the Nature of the Aire; assuming together with these things the Quality of the present time, viz. the season of the year"
Page 280Open in Reader
Books behind the August 2031 moon calendar
Open the cited books and chapters behind the monthly lunation calendar.
Moon Phases August 2031 - FAQ
When is the full moon in August 2031?
The full moon in August 2031 is on August 3, 2031 at 01:46 AM UTC UTC, in Aquarius. The page also converts that moment into the visitor's local timezone.
When is the new moon in August 2031?
The new moon in August 2031 is on August 18, 2031 at 04:32 AM UTC UTC, in Leo. The page also converts that moment into the visitor's local timezone.
How many moon phases are there in August 2031?
There are 4 major lunar phase events in August 2031: Full Moon, Last Quarter, New Moon, First Quarter.