Greetings From California
I'm a San Diego resident and an avid diver, but I really haven't ever been diving in San Diego (I've dove in Kona, HI and am interested in doing a few dives here a bit later this year). As far as I know, there's really no shore diving in Mission Bay. The area has very heavy boat traffic of both sailing vessels and speed boats and I don't think the Paradise Point resort has any diving facilities. There may very well be some cool marine life in the bay, but to my knowledge, the locals DO NOT dive there. On a lighter note, there are plenty of day boats based in Mission Bay. The Dive Bliss
http://www.divebliss.com/ is based in Quivira Harbor, which is near Paradise Point. I'm yet to dive with them, but I'm planning on booking a trip with them to the Coronado Islands (one hour ofshore from Mission Bay in Mexican territorial waters, supposed to have a sea lion colony there) in late July. If you want me to tell you how that went, please tell me in your next post under this thread. If you get a rental car, you'd be able to explore the really great shore diving opertunities that SD has to offer at the La Jolla sites such as the Famous La Jolla Cove or sites like La Jolla Shores (submarine canyon) or the marine room with it's tame leopard sharks and bat rays. Again, I'm yet to start diving locally, so this is all second hand info. Personally, I would directly e-mail or call someone who does a lot of diving in San Diego, like the staff at Dive Bliss or the crew of the boat Lois Ann
http://www.loisann.com/, or a local dive shop like
http://www.divinglocker.com/, or the concierge at Paradise Point, to ask whether there is any shore diving at all in Mission Bay (I doubt it, but I'm probably wrong). If not, don't get discouraged, there's still a lot of fun to be had in San Diego. One last thought, maybe you'd get more responces if you had posted in the North America forum, United States-California Kelp Divers-SoCal subform
Good Luck With That
-Mantasscareme