For how many days did the floodwaters prevail in Genesis?

Genesis says the floodwaters prevailed for 150 days.

Genesis 7:24 states that the waters prevailed upon the earth for 150 days. This figure is different from the 40 days and 40 nights of rain described earlier. The rain marks the period of rainfall, while the 150 days describe the extended period during which the floodwaters remained dominant.

Genesis 8 then says that God remembered Noah, caused a wind to pass over the earth, and the waters began to subside. The ark came to rest on the mountains of Ararat, but Noah and the animals stayed aboard while the land continued drying.

Readers sometimes treat 40 days as the whole flood duration. The text itself gives several stages and time markers, including the rainfall, the prevailing waters, and the later drying of the ground. The specific duration for the waters prevailing is 150 days.