Hi, James -
I saw Phil last night at our local UPS meeting, and he told me about this post. I also live in SD and do probably 200 local dives/year - I'm more than happy to try to point you in the right (and specific) direction for local dives, but I will tell you that (as Phil mentioned) the water here is cold...I wear a drysuit, and when it's in the shop, I wear...my backup drysuit! Water temps now are between 50-52 F at depth - this is cold for this time of year, but only by about 5 degrees - as Phil said, it has been a freaky year!!!
(Hell, you may have more cold water dives than me and all my dive buddies put together, but I just want to be sure that you're aware - I think people figure San Diego has warm, blue water - I even got a comment from a Bay Area diver the other day about how it must be nice to dive year-round in warm water - but - um - no. Please forgive me if I am underestimating your experience - but the only time I didn't do this, someone showed up w/ a 3 mm suit and full-foot fins and was pretty unhappy. I see "Singapore" and am making an assumption that could be terribly unfair!!!!)
My recommendation for someone unaccustomed to the murky green water we often have here is generally either a day trip to Catalina or a day trip to Los Coronados... If this is your first cold-water experience, those will give you a taste and are are great choices - I'd not recommend you introduce yourself to San Diego diving with wreck alley or a bottomless dive like the rigs right out of the box - kelp is great, but you can dive it in much prettier water in Catalina. La Jolla Shores can be awesome and is one of my favorite macro sites worldwide - but I have to say that in my opinion, it is not always an easy entry (through the surf in full gear), and the surface swim is pretty long - it is best to do this with someone experienced at it.
I'll try to check back - or you can PM me for an email address - and I can give you specific recommendations on boats, sites, etc. I am in and out of town in October, so putting together a small charter is a possibility...
Best -
Allison