After examining the scriptures, here's what I think are two possibilities:

1. Peter was never ON a porch when he denied Jesus.
2. John does not record what happened in chronological order.

In Matthew, I notice that for "porch", the KJV uses the word pulón (πυλών, ῶνος, ὁ) Definition: a porch, gateway Usage: a large gate; a gateway, porch, vestibule.

It's word origin is pulé (πύλη, ης, ἡ) Definition: a gate Usage: a gate.

NKJV uses the word "gateway" rather than "porch" here.

ESV uses "entrance"

NIV uses "gateway"

• 1st Denial: In the courtyard
• 2nd Denial: At the gateway
• 3rd Denial: Among those who stood by

Matthew 26:69-75 NKJV

Peter Denies Jesus, and Weeps Bitterly

69 Now Peter sat outside in the courtyard. And a servant girl came to him, saying, “You also were with Jesus of Galilee.”

70 But he denied it before them all, saying, “I do not know what you are saying.”

71 And when he had gone out to the gateway, another girl saw him and said to those who were there, “This fellow also was with Jesus of Nazareth.”

72 But again he denied with an oath, “I do not know the Man!”

73 And a little later those who stood by came up and said to Peter, “Surely you also are one of them, for your speech betrays you.”

74 Then he began to curse and swear, saying, “I do not know the Man!”

Immediately a rooster crowed. 75 And Peter remembered the word of Jesus who had said to him, “Before the rooster crows, you will deny Me three times.” So he went out and wept bitterly.

In Mark, I notice that for "porch", the KJV uses the word proaulion (προαύλιον, ου, τό) Definition: a vestibule Usage: a porch, court before a building, vestibule.

It's word origin is both pro and aulé

pro (πρό) Definition: before Usage: (a) of place: before, in front of, (b) of time: before, earlier than.

aulé (αὐλή, ῆς, ἡ) Definition: a courtyard, a court Usage: court-yard, fore-court, sheep-fold; but it may be understood as: palace, house.

NKJV uses the word "porch" here, but not in Matthew.

ESV uses the word "gateway" here rather than "porch" with a footnote that says "Or forecourt".

NIV says "Entryway"

• 1st Denial: In the courtyard, while he warmed himself
• 2nd Denial: He went on the porch, so sometime after. (Might not be a porch or he might not still be on the porch)
• 3rd Denial: Among those who stood by

Mark 14:66-70 NKJV

Peter Denies Jesus, and Weeps

66 Now as Peter was below in the courtyard, one of the servant girls of the high priest came. 67 And when she saw Peter warming himself, she looked at him and said, “You also were with Jesus of Nazareth.”

68 But he denied it, saying, “I neither know nor understand what you are saying.” And he went out on the porch, and a rooster crowed.

69 And the servant girl saw him again, and began to say to those who stood by, “This is one of them.” 70 But he denied it again. And a little later those who stood by said to Peter again, “Surely you are one of them; for you are a Galilean, and your speech shows it.”

71 Then he began to curse and swear, “I do not know this Man of whom you speak!”

72 A second time the rooster crowed. Then Peter called to mind the word that Jesus had said to him, “Before the rooster crows twice, you will deny Me three times.” And when he thought about it, he wept.

• 1st Denial: After he was brought in. (On the "porch" perhaps?)
• 2nd Denial: While Peter warmed himself.
• 3rd Denial: (Still warming himself?)

John 18:15-18, 25-27

Peter Denies Jesus

15 And Simon Peter followed Jesus, and so did another disciple. Now that disciple was known to the high priest, and went with Jesus into the courtyard of the high priest. 16 But Peter stood at the door outside. Then the other disciple, who was known to the high priest, went out and spoke to her who kept the door, and brought Peter in. 17 Then the servant girl who kept the door said to Peter, “You are not also one of this Man’s disciples, are you?”

He said, “I am not.”

18 Now the servants and officers who had made a fire of coals stood there, for it was cold, and they warmed themselves. And Peter stood with them and warmed himself.

Peter Denies Twice More

25 Now Simon Peter stood and warmed himself. Therefore they said to him, “You are not also one of His disciples, are you?”

He denied it and said, “I am not!”

26 One of the servants of the high priest, a relative of him whose ear Peter cut off, said, “Did I not see you in the garden with Him?” 27 Peter then denied again; and immediately a rooster crowed.