The best time to visit Carcavelos for a holiday rental is during the summer months, particularly in July, when the sun is shining and the beaches are alive with activity. This peak season, spanning from June to August, draws in sun-seekers and surfing enthusiasts eager to enjoy the warm Mediterranean climate, with temperatures often reaching around 30°C.During July, you can expect vibrant beach life, where you can soak up the sun, partake in watersports, or simply relax by the shore. The lively option is complemented by local festivals and events that celebrate Portuguese culture, making it an exciting time to immerse yourself in the local scene.For those considering a more budget-friendly option, December offers a unique charm, with fewer tourists and milder temperatures around 15°C. While the beach experience may be different, visiting in winter allows you to explore Carcavelos' historical sites and enjoy cosy dining experiences without the summer crowds.Ultimately, your choice of when to visit Carcavelos should reflect your preferences for lively beach activities in peak season or a quieter, more relaxed atmosphere in the off-peak months.