Look for a space in between the numerous morrings and anchor outside the main harbor basin, just south of the green buoys.
There is a little swell wrapping into the anchorage when trade winds are up, but it is not uncomfortable.
It's not the prettiest of anchorages and noisy during daytime, due to the harbor and the nearby airport. It is however safe and a great base to rent a car and visit the island.
A smooth sea never made a skilled sailor.