When to Go
High season runs from July through August, when the region is inundated with foreign tourists. During the summer of 2014 more than 45 different airlines had scheduled flights into Split, making it the most accessible of all Croatian destinations. Prices at this time rise significantly, and it can be difficult to find a place to sleep if you haven't reserved in advance, restaurant staff are overworked, and beaches are crowded. On top of everything, it can be very hot. On the positive side, some museums and churches have extended opening hours, the season's open-air bars and clubs bring nightlife to the fore, and there are numerous cultural festivals with performances starring international musicians, dancers, and actors. Low season runs from November through April, when many hotels and restaurants close completely, the exception being over the New Year's period, when some of the more sophisticated establishments (for example in Hvar Town) open their doors for the holidays. At this time of year the weather is unreliable, but if you're lucky you could find yourself drinking morning coffee in the sunshine below a deep blue sky, against a backdrop of snowcapped mountains.
However, for most people the best time to visit is midseason, May through June and September through October. During these periods you'll miss the crowds, the weather should be sunny and dry, and the sea will be warm enough to swim in; the region's hotels and restaurants will be open, but their pace slow enough to lend an air of true relaxation.