The islands have a subtropical climate, with long warm summers and moderately warm winters. Because of the Gulf Stream, this creates and ever-lasting springtime. Temperatures vary from 18°C in winter (December to March) to around 24°C in summer (July to September). The water temperature is warmest in Summer, until October.
Because of the weather, it is both busy in winter and in summer. Another popular period is Carnaval (February/March). From a value perspective (airfares and accommodation), the best deals and packages are from November to mid-December and from April to June (with the exception of Easter).