NET
13 Instead, they tried to row back to land, but they were not able to do so because the storm kept growing worse and worse.
Darby
13 But the men rowed hard to regain the land; but they could not; for the sea grew more and more tempestuous against them.
KJV
13 Nevertheless the men rowed hard to bring [it] to the land; but they could not: for the sea wrought, and was tempestuous against them.