The best time to go to Gavà for pleasant weather and fewer crowds is during late spring (May to early June) or early autumn (September to October).During these periods, you'll experience warm, sunny days great for enjoying the beaches and outdoor activities without the peak summer heat or the larger crowds that July and August bring. The sea is still warm enough for swimming in early autumn, and the local restaurants and attractions are fully operational but less busy.For those looking to enjoy the full beach experience with guaranteed hot weather, July and August are excellent choices. While these months are the busiest, Gavà's extensive beachfront means it rarely feels overly crowded, and you'll find a lively option with plenty of activities and events.