The best time to go to Cayeux-Sur-Mer is during the summer months, from June to August, when the weather is warm and pleasant, and the resort is fully active.During these months, you'll experience average temperatures around 20-22°C (68-72°F), making it ideal for enjoying the beach and outdoor activities. The days are long, with plenty of sunshine, allowing for extended seaside strolls and exploration of the local area. This period is when all the local shops, restaurants, and attractions are open and operating at their full capacity, offering the widest range of experiences.For travellers who prefer a quieter experience with good weather, late spring (May) and early autumn (September) are also excellent choices. The temperatures are still mild, usually around 15-18°C (59-64°F), and the crowds are significantly smaller than in peak summer. You can enjoy peaceful walks along the promenade and the beach, and many establishments remain open, though some might have reduced hours.