Weather in Nice, France during JulyThe sea temperature is also pretty good (around 23°C/74F) - which certainly makes it warm enough to swim in the sea. Nice has a round 5kms of beaches, all along the famous Promenade des Anglais.
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If you love swimming, the best time to go to Nice is in the summer, early autumn and late spring. The average sea temperature is a pleasant 23°C, which is perfect for a relaxing swim. You'll also have 14 hours of sunshine to enjoy per day from June to September and 11 hours a day throughout autumn.
Summer in NiceAverage temperatures in July and August hover around 80°F (27°C), with some days being even hotter. And if you want to enjoy a swim in the Mediterranean Sea, the water temperatures in Nice during the summer months are usually pretty balmy as well, averaging around 72°F (22°C).
Summer in NiceAnd if you want to enjoy a swim in the Mediterranean Sea, the water temperatures in Nice during the summer months are usually pretty balmy as well, averaging around 72°F (22°C). But if you do decide to come during summer, don't forget to pack your sunscreen!
September- OctoberOne of the best times to visit is during Nice's fall shoulder season. Visitors can still expect the popular attractions to be busy, but they will be far less crowded than during the peak season. Temperatures cool down to the mid-60s – perfect for sightseeing and maybe a little sunbathing too.
Most people prefer to swim when the air temperature is warm but not too hot, ideally between 70 and 80 degrees Fahrenheit (21 to 27 degrees Celsius). Extremely hot weather can cause dehydration and sunburn, while cooler weather can make it uncomfortable to be in and around the water.