The best time to visit Porto Heli is during the shoulder seasons, specifically from late April to early June and again from September to early October. These periods offer pleasant weather, fewer crowds, and comfortable conditions for enjoying the area.During late spring, the temperatures are warm but not excessively hot, typically ranging from the mid-60s to low 80s Fahrenheit (18-28°C). The sea is beginning to warm up, making it suitable for swimming, and the natural landscape is lush and green. This time is ideal for couples seeking a relaxing getaway with opportunities for coastal walks, boat trips to nearby islands like Spetses, and dining al fresco without the peak summer rush.Early autumn also provides excellent conditions, with temperatures similar to late spring and the sea at its warmest after the summer months. The crowds have thinned significantly, allowing for a more serene experience at beaches and local attractions.