Smartgirl, just aside from the Intercontinental, you woul find a lot of people renting jet ski, prices range from 250-350 QAR/Hr. Depending actually on the size/power (750/1200/1300). Also there a few of them to whom you call, arrange a date and time and they will be there for you, right on the beach. Now if you need to rent it directly in a show room you should go for prior answers.

Try looking for "Jet Ski rental" (combination of words) in the search bar and you might find other similar discussion nodes even phone numbers.

Best of luck...have fun....enjoy!!!