Summer is actually a great time to visit the islands because lodging rates are much lower and the beaches, roads and restaurants are never crowded. Most holiday reservations are made many months in advance. December through May is considered the dry season while June through November is considered the more humid season. However, in our experience, rainshowers or clear skies can occur at any time during the year. In general, rainstorms pass quickly and you should have sunshine on most days.
Every year brings more sophisticated storm warning systems.
It is unusual for any one island to be severely affected more than once or twice every 10 years and your actual odds of experiencing a hurricane are very low. Some travelers purchase trip cancellation insurance in advance of travel. Experienced visitors know that it is not important to stay in accommocations directly on a beach. Few are ever really crowded, even in peak season. All are public and free.