Snorkeling or Kayaking tour in September (Doha)

Hi everyone
Before my expatriation in early November, I will come to Doha in September for 3 weeks. I therefore wish to enjoy a weekend to explore the area and "relax." I had the idea to take a "tour", like snorkeling (I do not find much) or kayak (not riding the desert because already tried). I contacted the company Entalek. Do anyone know other organizations or would be interested?
Thank you