The best time to visit San Sebastián is during the shoulder seasons, specifically May, June, and September, or during the height of summer in July and August.For those who prefer pleasant weather without the busiest crowds, May, June, and September are ideal. The temperatures are warm and comfortable, superb for enjoying the beaches and wandering through the Old Town's narrow streets. You'll find most restaurants and attractions open, but with slightly fewer visitors than in peak summer, making it easier to secure reservations at popular pintxos bars or enjoy a more relaxed stroll along La Concha Bay.Couples looking for a romantic getaway often find June or September particularly appealing. The city retains its lively option, but with a more relaxed pace. You can enjoy long walks along the promenade, dine al fresco, and explore the Monte Igueldo funicular for panoramic views, all under generally clear skies.Families travelling with children often prefer July and August. While these months are the busiest and hottest, they offer the warmest sea temperatures, which are superb for swimming and spending extended time on the city's beautiful beaches like La Concha and Ondarreta. Many hotels and apartments cater to families, and there are often more organised activities and entertainment available during the school holidays.