Is it considered astrology when some sailors say: If such-and-such a star appears, the sea will become rough?

Question:
A questioner says that some sailors say that if such-and-such a star appears, the sea will become rough, and there will be winds and storms, so where does

Answer:
this come from? Meaning, Allah has set times for the winds and times for the rains. They may occur at those times, or they may not, but they have their set times. There is nothing wrong with knowing the times when winds are expected to blow or rains are expected to fall, as Allah has established this as a custom.
This is what is definitive. If one is definitive, then being definitive is not permissible. But if one says it may happen, or that there are signs indicating this, then there is no harm in it. But being definitive and claiming that this will happen, or that such-and-such will happen at such-and-such a time, is a claim to knowledge of the unseen. Yes.