The Algarve enjoys over 300 days of sunshine a year. May, June, and September offer the best balance of warm weather, sea temperatures around 20-22°C, and thinner crowds than peak summer. July-August is hottest and busiest, with resort towns at capacity and prices highest. Winter (November-February) stays mild (14-17°C) and is popular with golfers and walkers, though many seasonal beach restaurants close.