Were in May - June. We swam, but not in Cassablanca, by the way, this is the economic capital of Morocco, a lot of European, but if you go further to Marrakech, etc. - it is certainly more exotic there, as for the Slavs, and the ocean is warm.
Convenient location, good food (choice of restaurants and national cuisine), excellent service. Everyone is attentive and polite. We went on our own, without a tour operator.