Formentera in September

May and October offer the sweet spot — warm enough for swimming but without the summer crowds or prices. Water temperature hits 20°C by May and stays above 22°C through October. Hotels charge 30-40% less than peak summer rates. June through September brings guaranteed sunshine and the full beach club scene. But here's the trade-off: accommodation prices double, restaurants require reservations, and popular beaches fill up by mid-morning. August sees the most crowds, particularly Spanish families during the first two weeks. Winter on Formentera feels like a different island entirely. Most hotels and restaurants close from November through March, leaving just a few hundred year-round residents. The ferry schedule drops to just two sailings per day. But if you're into solitude and don't mind cool weather, the island's wild side emerges. Shoulder season in late September and early October might be perfect timing. The sea stays warm from summer heating, crowds thin out after Spanish school holidays end, and the light turns golden for photography.