Astrology CalendarMercury Retrograde 2027: The Exact Dates
Three windows in 2027, with stations to the minute and the degrees each one covers. Computed from an ephemeris, not copied, and dated so you can tell.
Retrogrades
Mercury retrograde in Leo brings something you made or said in public coming back for a rewrite. Every occurrence with exact dates and degrees, what retrograde motion physically is, and what the evidence actually supports.

Mercury turns retrograde three or four times a year for about three weeks each time, and because of how its orbit lines up with ours the retrogrades cluster in one element for a year or two before moving on. These are the periods that start or end in Leo.
| Starts | Ends | From | Back to |
|---|---|---|---|
| August 12, 2017 | September 5, 2017 | 11°38' Virgo | 28°25' Leo |
| July 26, 2018 | August 19, 2018 | 23°27' Leo | 11°32' Leo |
| July 7, 2019 | August 1, 2019 | 4°28' Leo | 23°57' Cancer |
| August 5, 2024 | August 28, 2024 | 4°06' Virgo | 21°24' Leo |
| July 18, 2025 | August 11, 2025 | 15°34' Leo | 4°15' Leo |
| July 29, 2031 | August 22, 2031 | 26°26' Leo | 14°18' Leo |
| July 9, 2032 | August 3, 2032 | 7°33' Leo | 26°49' Cancer |
| August 8, 2037 | August 31, 2037 | 7°00' Virgo | 24°07' Leo |
| July 21, 2038 | August 14, 2038 | 18°35' Leo | 7°03' Leo |
The degrees matter more than the dates for anybody with a chart in front of them. A retrograde that stations on a degree close to something of yours is the one you will notice; the rest are weather. Mercury covers the same stretch of zodiac three times during a retrograde, forward, back and forward again, which is where the idea of revisiting comes from and is literally true of the planet.
No planet goes backwards. Retrograde is an appearance, and it is the appearance that gave astronomy one of its hardest problems for two thousand years. A planet looks like it reverses because we are watching it from another moving planet: when the Earth overtakes an outer planet on the inside of its orbit, or an inner planet overtakes us, the line of sight swings the other way for a while.
The same thing happens on a motorway. Overtake a slower car and, against the distant hills, it appears to slide backwards for a few seconds. Nothing about the other car changed. Your position did.
Explaining those loops is what Ptolemy's epicycles were for, and getting rid of them is a large part of why heliocentric astronomy won. So retrograde motion is completely real, completely understood, and entirely a matter of where you are standing.
Leo is Fire and Fixed, ruled by the Sun. So a retrograde here tends to land on something you made or said in public coming back for a rewrite.
That is the whole of what the sign adds. A retrograde in Leo is not worse or better than one anywhere else. It points at a different part of life, and the degrees tell you whether it points at yours.
The sign is the same for everybody. The house is not, and the house is what decides whether a retrograde in Leo touches your job, your money or your marriage. On whole sign houses it follows straight from your rising sign.
| Rising sign | House | So it is about |
|---|---|---|
| Aries | 5th | romance, children and creative work |
| Taurus | 4th | home, family and property |
| Gemini | 3rd | talking, learning, siblings, short trips |
| Cancer | 2nd | money you earn and what you own |
| Leo | 1st | you, your body, how you come across |
| Virgo | 12th | rest, grief and what nobody sees |
| Libra | 11th | friends, groups and hopes |
| Scorpio | 10th | career and reputation |
| Sagittarius | 9th | travel, study and belief |
| Capricorn | 8th | shared money, intimacy and endings |
| Aquarius | 7th | partnership, marriage and open conflict |
| Pisces | 6th | daily work, health and routine |
That is the difference between a horoscope and a reading. The same three weeks are a paperwork problem for one person and a conversation with a partner for another, and which it is for you was fixed by a birth time.
Mercury in Leo as a birth placement is the permanent version, which is a different thing: about one person in eight is born with Mercury retrograde, and for them the whole idea reads rather differently. The 2027 Mercury retrogrades are listed here.
July 29, 2031 to August 22, 2031 is the next one. The table on this page lists every occurrence from 2015 to 2040.
About three weeks, three or four times a year. The ones in Leo have run 23 to 24 days.
Something you made or said in public coming back for a rewrite. Whether it affects you personally depends on whether it stations near a degree in your own chart.
The motion is real and completely understood: it is an optical effect of watching one moving planet from another. The claimed effects on electronics, travel and contracts have no measured support.
RubyAstro writes about astrology for reflection and self-understanding. Nothing here is medical, legal or financial advice, and none of it is a prediction of events. Read our full disclaimer.