Albert Barnes Commentary Acts 27:9

"And when much time was spent, and the voyage was now dangerous, because the Fast was now already gone by, Paul admonished them," — Acts 27:9 (ASV)

When much time was spent. This was in sailing along the coast of Asia and in contending with contrary winds. It is evident that when they started, they had hoped to reach Italy before the dangerous time of navigating the Mediterranean should arrive. But they had been detained and hindered contrary to their expectation, so that they were now sailing in the most dangerous and tempestuous time of the year.

Because the fast was now already past. By "the fast" is evidently meant the fast that occurred among the Jews on the great day of atonement. That was the tenth of the month Tisri, which corresponds to a part of September and part of October. It was therefore the time of the autumnal equinox, and a time when navigating the Mediterranean was considered particularly dangerous, due to the storms that usually occurred about that time. The ancients regarded this as a dangerous time to navigate the Mediterranean. See the proofs in Kuinoel on this passage.

Paul admonished them. Paul exhorted, entreated, or persuaded them. He was somewhat accustomed to navigating that sea and endeavored to persuade them not to risk the danger of sailing at that season of the year.