Bermuda has a warm subtropical climate moderated by the Gulf Stream. There is no true dry season — rain falls throughout the year — but the character of each season is quite different.
Spring (March–May) is the sweet spot for many visitors. Temperatures are comfortable rather than hot, the island is in bloom, and crowds are smaller than in summer. April and May are statistically the driest months. The Bermuda Triangle Challenge road race and the Bermuda Marathon Weekend happen in January and mid-January respectively, drawing runners, but otherwise spring is quieter.
Summer (June–September) is peak season. Temperatures hover around 28–30°C, the water is warm enough for snorkeling and swimming, and the island is busy with cruise ships and holidaymakers. Cup Match in late July or early August is the social highlight of the Bermudian year — expect everything to be booked well in advance around that time. Hurricane season runs June through November, with the greatest risk in September and October. Most years Bermuda escapes direct hits, but it is worth monitoring forecasts in the late season.
Autumn (October–November) is the rainiest period. Prices drop, crowds thin, and the island takes on a quieter, more local character. The water is still warm enough for swimming well into October.
Winter (December–February) is mild by Atlantic standards — rarely below 15°C — but the sea is too cool for most swimmers. Many hotels reduce their rates significantly. This is a good time if you want the island without the crowds, and for golfers the courses are uncrowded.