Best time to swim in Cassis in French Riviera and Provence Sea temperature by month

Cassis and its calanques have long made holidaymakers dream of bathing spots that remain natural and peaceful. Indeed, during the summer season the coves and small private beaches are beautiful. Sunny days and the pleasant sea temperature in Cassis are an open invitation to swim. If you plan to spend your holiday in Cassis and swimming is on your list of activities, make sure your stay coincides with the right time to fully enjoy seaside pleasures. Like other towns on the Mediterranean, Cassis experiences seasonal changes that affect sea temperature.

Best periods for a seaside holiday in Cassis

Swimming in Cassis is particularly pleasant from July to September. The warmth is enjoyable and the sea temperature gives a comfortable feeling of well-being. But expect crowded beaches.

If you prefer tranquillity, May and June will let you make the most of the calanques and beaches. As the water is still cool, there are fewer summer visitors.

In autumn temperatures drop quickly and even if sun and warmth still feature in the weather, the sea in Cassis is already cool in October and November.

Periods not favorable for swimming in Cassis

From December to April it is preferable not to swim in Cassis because the sea temperature gradually cools. Due to icy water in January and February, Cassis's beaches and calanques regain their calm. And even though temperatures begin to rise in March and April, the water is still too cold for comfortable swimming. May marks the return of the joys of sea bathing.