The high season for travel to Bermuda is during the warmest part of the year from April through until the end of October, and this is the time when the tourist industry on the island is at its peak, with all attractions open for business.
During the colder season, hotel prices tend to be cheaper, and if you're looking for a golfing holiday in Bermuda, then this is the best time to visit. It's not necessarily a good idea to go swimming in the sea, because it gets pretty cold in winter, but offshore winds make Bermuda an excellent place to go wind-surfing or sailing.