1The third day, there was a wedding in Cana of Galilee. Jesus’ mother was there. 2Jesus also was invited, with his disciples, to the wedding. 3When the wine ran out, Jesus’ mother said to him, “They have no wine.”
4Jesus said to her, “Woman, what does that have to do with you and me? My hour has not yet come.”
5His mother said to the servants, “Whatever he says to you, do it.”
6Now there were six water pots of stone set there after the Jews’ way of purifying, containing two or three metretes apiece. 7Jesus said to them, “Fill the water pots with water.” So they filled them up to the brim. 8He said to them, “Now draw some out, and take it to the ruler of the feast.” So they took it. 9When the ruler of the feast tasted the water now become wine, and didn’t know where it came from (but the servants who had drawn the water knew), the ruler of the feast called the bridegroom 10and said to him, “Everyone serves the good wine first, and when the guests have drunk freely, then that which is worse. You have kept the good wine until now!” 11This beginning of his signs Jesus did in Cana of Galilee, and revealed his glory; and his disciples believed in him.
12After this, he went down to Capernaum, he, and his mother, his brothers, and his disciples; and they stayed there a few days.
13The Passover of the Jews was at hand, and Jesus went up to Jerusalem. 14He found in the temple those who sold oxen, sheep, and doves, and the changers of money sitting. 15He made a whip of cords and drove all out of the temple, both the sheep and the oxen; and he poured out the changers’ money and overthrew their tables. 16To those who sold the doves, he said, “Take these things out of here! Don’t make my Father’s house a marketplace!” 17His disciples remembered that it was written, “Zeal for your house will eat me up.”
18The Jews therefore answered him, “What sign do you show us, seeing that you do these things?”
19Jesus answered them, “Destroy this temple, and in three days I will raise it up.”
20The Jews therefore said, “It took forty-six years to build this temple! Will you raise it up in three days?” 21But he spoke of the temple of his body. 22When therefore he was raised from the dead, his disciples remembered that he said this, and they believed the Scripture and the word which Jesus had said.
23Now when he was in Jerusalem at the Passover, during the feast, many believed in his name, observing his signs which he did. 24But Jesus didn’t entrust himself to them, because he knew everyone, 25and because he didn’t need for anyone to testify concerning man; for he himself knew what was in man.
The "wine" spoken of in this passage is with little doubt fermented since the word is oinos (οἶνος), a translation of the Hebrew word yayin (יַ֜יִן). The word for "grape juice" (thus not fermented) is trux (τρύξ), a word not found in the New Testament. The limited use of grape juice may relate to the rapid fermentation of grape juice in the climate of Israel. It was common, however, to mix two to three parts water with wine in the first century, a practice that came from Greece with the Hellenizing influence that came from Alexander the Great's entrance into Semitic culture in the middle of the 4th century B.C. This was largely done in order to lessen the cost of wine rather than for sterilizing the water, which is sometimes posited as the reason.
You may read a more extensive study of wine in my article on wine at [H. Wayne House], "Wine," Baker Encyclopedia of the Bible, Vol 2, J-Z, Walter A. Elwell, Gen. Ed. (Grand Rapids, MI: Baker Book House), 2145-2148.