Aquarius and Pisces compatibility: when your partner reads you before you do

Compare Aquarius and Pisces by sign or birth date

The two Sun signs are filled in below. Switch to two birth dates and we look up Sun, Mercury, Venus and Mars for both of you, so you can read the placements for your own dates. Uncertain signs are flagged. No birth time and no account needed.

Birth-date positions use Swiss Ephemeris calculations based on NASA JPL planetary data. Read about the data and precision. The historical date tables below use a separate PyEphem calculation.

Next-door rulers, on purpose

In Ptolemy's scheme their rulers are neighbors too, and on purpose. He gives each planet its houses in the order of the spheres. Cancer and Leo go to the Moon and Sun, and Saturn, the farthest planet out, takes the two signs opposite, Capricorn and Aquarius, with the added reason that these signs are 'cold and wintry'. Jupiter, whose sphere sits just inside Saturn's, gets 'the two signs next to the foregoing', Sagittarius and Pisces (Tetrabiblos I.17). So both of Jupiter's houses sit beside Saturn's on the wheel because Jupiter sits beside Saturn among the planets.

Being neighbors doesn't give them an aspect. Aquarius and Pisces have none of Ptolemy's four aspects and none of his other sign links, so he classes them as disjunct (I.16), and modern astrologers call the distance a semisextile. His elemental triangles don't join them either: Saturn helps govern the air signs, Mars with the Moon and Venus governs the water signs, and Jupiter governs neither of those two triangles (I.18). Aquarius is an air sign for all its water jar, and the other air signs are Gemini and Libra. What these two do share is a modern addition. Aquarius took Uranus as its modern ruler and Pisces took Neptune, which makes them the only two next-door signs that both carry one.

They're neighbors on the horizon too. At latitude 36° north, Aquarius and Pisces together take about 2 hours 49 minutes to pass the eastern horizon, by our calculation, and of the twelve pairs of next-door signs only Pisces and Aries do it faster. A sign that rises quickly holds the eastern horizon for less time, so a birth time that's slightly off moves a Pisces Ascendant or an Aquarius one into the next sign sooner than most.

Asking before you say what you see

The Pisces was probably right, and meant it as closeness. The Aquarius heard a feeling announced on their behalf, at the table, before they'd decided to have it. Pisces is said to pick up what's coming before anyone says it, and Aquarius to work a feeling out privately and put it into words late. Whoever reads faster, Sun sign aside, has the same job.

That job is to ask permission first. 'Do you want to hear what I think is going on?' gives the other person a choice, and 'You're heartbroken' doesn't. A no means no read tonight, and it isn't a rejection of the person who offered. The slower partner's job is to say what would help instead, in plain terms: talk about the gigs already booked, help sell the spare amp, or just eat dinner and watch something.

A Pisces needs attention back, too, and an Aquarius usually gives it on their own terms: a question about what would help this week, a plan for the weekend, or a detail remembered from a month ago. Those count. And keep a line around what's private. A feeling you've spotted in your partner isn't yours to explain until they choose to talk about it.

And the Aquarius really may be relieved the band is over. Saying so isn't denial. Take the answer at its word even if your guess still feels right, and if they want to come back to it later, let them be the one who brings it up.

Born February 18 or 19?

Is February 19 Aquarius or Pisces? Pisces by noon Eastern, every year we checked. By our computation from the Sun's positions, every time the Sun changed signs on a February 19 from 1950 to 2026, it did so before noon Eastern, so a morning birth in one of those years can still be Aquarius. In US Eastern time, February 19 was partly Aquarius in 21 of the 67 years from 1960 to 2026, most recently in 2016, and never mostly Aquarius.

February 18 is the date that moves. It was mostly Pisces in 12 of those 67 years, all of them since 1989. In the same 21 years that February 19 started in Aquarius, February 18 had no Pisces in it at all. So a February 18 birthday from the 1960s, 1970s or early 1980s points to an Aquarius Sun unless the birth came late in the day, and a recent one needs the birth time.

The exact crossing times for recent years are in the Pisces dates and season section, and the Big 3 lookup finds the Sun, Moon and rising sign for any year. A cusp isn't a third sign. Once you know which side of the line the Sun was on, read that sign's matches. For the Pisces side, start with how Pisces fares against all twelve Sun signs.

Mercury on both sides of the border

Because Mercury stays close to the Sun, an Aquarius birthday puts it in Capricorn, Aquarius or Pisces, and a Pisces birthday in Aquarius, Pisces or Aries. The two ranges overlap in two signs. That overlap is why this pair's Mercury signs match more often than any other Pisces pairing's, apart from two Pisces. Astrologers read Mercury as how a person thinks and talks, so a shared Mercury sign is one reason these two can follow each other's thinking so easily. It doesn't mean either one knows what the other feels.

Sometimes the overlap runs crosswise. In 4.7% of modeled pairs of Aquarius and Pisces dates, each date's Mercury sits in the other's Sun sign, so the Aquarius thinks in Pisces and the Pisces in Aquarius. Pisces's other neighbor, Aries, is the only other Pisces pairing where that can happen. In that crossed pairing it may well be the Aquarius who reads first, which is one more reason not to hand out the roles by Sun sign.

Venus can match as well, since the possible Venus signs for the two birthdays overlap in Capricorn, Aquarius, Pisces and Aries. Whether yours do is a quick check. Enter both dates in the comparison near the top to see each Mercury and Venus sign, and draw up a free birth chart with the birth time to see the house each Mercury falls in.

The Aquarius and Pisces date-sample estimates

These estimates pair two dates drawn independently from the 1950–2005 sample, with equal weight for every date within each Sun sign. They describe planetary combinations, not observed couples or relationship success.

Most common Venus pairings in this model: Capricorn with Aries (10.1%), Capricorn with Aquarius (9.1%), Aquarius with Aries (8.7%). Venus signs are listed in Aquarius Sun, then Pisces Sun order. Mars can occupy any sign with either Sun sign. The most frequent Mars signs on sampled Aquarius dates are Sagittarius (12.8%), Pisces (12.3%), Aries (11.7%), Scorpio (10.9%), and on Pisces dates Aries (13.3%), Taurus (12.3%), Capricorn (11.6%), Pisces (10.8%).

We sampled 20,454 dates, January 1, 1950, through December 31, 2005, with planet positions at noon UTC. Each modeled pair puts one Aquarius Sun date beside one Pisces Sun date chosen independently, so the figures describe placements, never couples.

Calculation method and downloadable date-sample tables

What draws them, and how they love

It often starts with a conversation that runs late. The Aquarius floats an odd idea, about how a town should be run or why some rule is unfair, and the Pisces doesn't ask for it to add up first. They get curious, and they think of a person the idea would help. When the Pisces gets swept up, the Aquarius stays level, and that steadiness is part of the pull. They may agree that someone needs help and disagree about what to offer: a change to the rules, or help for that person today.

In love, Aquarius tends to show care by being honest, dependable and willing to give a partner room, and Pisces by being tender, forgiving and close. In bed, both are usually pictured as open to trying something new. Where they can miss each other is afterward: the Pisces may want reassurance said out loud, and the Aquarius may feel that being asked was the reassurance. Venus and Mars say more than the Sun here. An Aquarius Venus wants friendship inside the romance and Mars in Aquarius wants to be chosen freely, while each birthday's Venus sign shows how close your two styles really are. Ask what the other wants out loud, even when you think you've already read it. All of this applies to any mix of genders.

A marriage between them has a good chance of lasting, mostly because of the friendship inside it. The long-run risk is drift: the Aquarius busy with causes and groups, the Pisces with an inner life of their own, each assuming the other is fine. Time apart isn't the threat. For a fixed sign like Aquarius it's often how a commitment stays freely chosen. What helps is the permission the dinner needed, asked both ways: 'Is it all right if I give Saturday to the campaign?' and 'Can I tell you what I've been feeling about us?' When they disagree, the Aquarius often argues the principle while the Pisces hears the tone, so say which one the fight is really about.

The friend who already knows, and the friend who'd rather say it

Friendship gives them more room than romance does, because a friend can choose when to talk. One notices something's wrong and offers company without asking for an explanation. The other turns up with a plan and talks around the point until they reach it. As siblings, the sore spot is usually the family explaining each of them to the other: 'that one's just sensitive', 'that one never says what's wrong'. Both do better speaking for themselves.

They're generous friends to have. A friend between jobs gets a standing dinner invitation, and a neighbor's fundraiser gets two volunteers. Agree between you before anyone hands out a spare key, though.

Two habits can make this pair turn toxic. One is reading as surveillance: watching a partner's face for the feeling they haven't admitted, then holding it up as proof. The other is keeping score, with the Aquarius tallying what's fair and the Pisces tallying every hurt it forgave without saying so. 'You keep telling me what I really feel' names the problem, and 'Ask me, and take my answer' says what has to change.

Two charts, three contacts to check

Start with your actual Mercury and Venus signs, since either can match even though your Sun signs differ. Two full charts show that first. Then look for one person's Mercury touching the other's Moon, which astrologers link with reading moods easily. Also check for one person's Moon touching the other's Uranus, Aquarius's modern ruler, taken as a need for room to feel something before sharing it. Both contacts can run in either direction. The Moon moves quickly, so birth times help. How a two-chart comparison is read, contact by contact covers the method.

'You're heartbroken,' heard by two different Mercury signs

Keep the Pisces from the dinner, with Mercury in Pisces, and change only the Aquarius's Mercury sign.

If the Aquarius has Mercury in Aquarius, the Sun signs repeated in Mercury, the line arrives in a register they aren't thinking in yet. They were sorting the breakup as a set of facts: who left, what happens to the bookings, whether the van gets sold. To them 'You're heartbroken' sounds like a conclusion skipped to, and the reply comes out cooler than they mean it: 'I said I'm fine.'

If the Aquarius has Mercury in Pisces, the same sign as their partner's, the line may land as something they half knew. This time they say, 'Yes, I think I am,' and then, 'Can we just watch something?' The Pisces says yes, and they do. Which dinner you'd get isn't written in the Sun signs; the two Mercury signs only tilt it.

Aquarius and Pisces questions