The best time to go to Porto Heli is generally from late spring to early autumn, specifically from May to October, when the weather is warm and sunny, superb for enjoying the coast.May and June offer pleasant temperatures, typically in the low to mid-20s Celsius, with less crowded beaches and attractions. This period is ideal for couples who want to enjoy the natural beauty and outdoor activities, such as exploring the nearby islands of Spetses and Hydra by boat, without the peak season bustle. The sea is warm enough for swimming, and the evenings are mild for dining al fresco.July and August are the warmest months, with temperatures often reaching the low to mid-30s Celsius. This is peak season, so expect more people, especially families. The long, sunny days are superb for spending time at the beach or by the pool. Many hotels offer family-friendly facilities, and there are various water sports available.September and October still provide lovely weather, with temperatures cooling down to the mid-20s Celsius. The sea remains warm from the summer heat, and the crowds thin out considerably.