Genesis 7:20 describes how deep the floodwaters rose during the great flood in Noah’s day: fifteen cubits above the highest mountains, covering even the tallest peaks. The verse is a plain account of the scale of the judgment, told by the narrator of Genesis to readers who needed to know just how complete the flood was. It is not a speech by a character but the storyteller’s record of what happened once the rain and the deep waters had done their work.
The waters rose fifteen cubits higher, and the mountains were covered.
Genesis 7:20 (WEB)
What Genesis 7:20 Means
The phrase “the waters rose fifteen cubits higher” tells you the flood did not stop at the hillsides. A cubit was roughly the length of a forearm, so fifteen cubits is somewhere around twenty-two feet or more, depending on which cubit measure is in view. The point is not an exact engineering figure but a picture of water pressing upward past every natural barrier the land could offer.
“The mountains were covered” completes the thought. The highest ground people knew was no refuge. Within the story, that is what made the flood so total and so final. The verse describes what happened. It does not explain every question a reader might raise about the physical mechanics of the event, and it does not promise anything to the reader directly. Its job is to make the reader feel the weight of what God brought about in judgment.
The Context of Genesis 7:20
Genesis is the first book of the Hebrew Bible, traditionally attributed to Moses, though many scholars think it was shaped over time from older sources. It was written to Israel and to anyone reading the story of how the world began and how God dealt with human sin. The flood account belongs to the larger story that moves from creation to the fall, from the fall to the spreading wickedness of humanity, and from there to God’s decision to judge the earth while preserving Noah.
The verses just before this one, Genesis 7:17 through 7:19, show the waters increasing and lifting the ark above the earth. Verse 20 reads as the peak of that rising. The verses that follow, through 7:23, record the death of every living thing outside the ark. Read in that sequence, verse 20 is the high point of the judgment, which is why the surrounding text stresses how complete the destruction was. That context changes the verse from a bare measurement into the turning point of the narrative.
Key Phrases in Genesis 7:20
Genesis 6:5
The LORD saw that the wickedness of man was great in the earth, and that every imagination of the thoughts of man’s heart was continually only evil.
(WEB)
This verse sets the reason behind the flood by describing the wickedness of humanity and the grief it caused God. Reading it alongside verse 20 helps you see that the flood was a response to real moral corruption, not an arbitrary act of force.
Genesis 8:1
God remembered Noah, all the animals, and all the livestock that were with him in the ship; and God made a wind to pass over the earth. The waters subsided.
(WEB)
This verse comes right after the flood account and shows God remembering Noah and the creatures in the ark. It shows that the same God who sent the waters also brought the waters down and kept His promise to preserve life.
A Short Prayer From Genesis 7:20
Lord, when I read about waters rising over every mountain, I am reminded that Your judgment is real and that sin carries weight. Help me take that seriously in my own life, and give me a healthy fear of what is wrong. At the same time, thank You that You made a way of rescue for Noah and his family. Keep me close to that way of safety in Christ, and help me trust You when my circumstances feel like they are rising higher than I can bear. Amen.
