You can make explicit why it was not easy to stay in the harbor. AT: “harbor did not sufficiently protect docked ships during winter storms” (See: rc://en/ta/man/translate/figs-activepassive)
a place near land that is usually safe for ships
Phoenix is a city port on the south coast of Crete. (See: rc://en/ta/man/translate/translate-names)
This speaks about the season of winter as if it were a commodity that someone can spend. AT: “to stay there for the cold season” (See: rc://en/ta/man/translate/figs-metaphor)
Some versions say “it faces northwest and southwest.” The sailors wanted to go to a place where they would be safe from the wind. The “face” of a harbor is a metaphor, like the “mouth” of a harbor, or the entrance of the harbor. (See: rc://en/ta/man/translate/figs-metaphor)
These directions are based on the rising and setting sun. Northeast is a little to the left of the rising sun. Southeast is a little to the right of the rising sun.
Here “weighed” means to pull out of the water. An anchor is a heavy object attached to a rope that is secured to the boat. The anchor is tossed into the water and sinks to the bottom of the sea keeping the ship from drifting about.