The best time to go to Putzu Idu is during the shoulder seasons of May, early June, or September.
These months offer warm, pleasant weather superb for beach activities and exploring, without the intense heat and larger crowds of the peak summer months of July and August. You'll find the sea is warm enough for swimming, typically around 20-24°C, and the coastal breeze makes for comfortable days.
For couples looking for a romantic getaway, May and September are particularly appealing. The beaches are less busy, allowing for more peaceful moments, and many of the local restaurants and bars are open, offering a relaxed dining experience. You can enjoy long walks along the white sandy beaches, such as S'Arena Scoada, or explore the nearby Sinis Peninsula with its archaeological sites like Tharros, without feeling rushed.
Families travelling with younger children might prefer early June or early September. The temperatures are comfortable for little ones, and the beaches are still relatively quiet, making it easier to find a good spot.