So I am wondering, is there any scuba diving in the Fort Lauderdale or other beach area that I might be able to get into in September?
Diving is huge in Florida.
I am going to Palm Beach Shores in July and have some dives and the PADI Drift course lined up. The following week I'll be on Anna Maria Island south of Tampa for some diving (provided the blobs of oil haven't come that far south by then!). The Palm Beach Shores area is apparently known for drift diving as the Gulf Stream passes close to shore there. The water is supposed to be very clear.
There is plenty of info on the web about Florida diving. Just Google. Lots of dive shop web sites list local wrecks. Florida is full of artificial reefs, natural reefs, and wrecks from Palm Beach southward down to the Keys. That would include Fort Lauderdale. The Tampa Bay area also has lots of artificial reefs.
You might want to buy a guidebook. I bought
Ned DeLoach's Diving Guide to Underwater Florida.
If you want to try something very fun and unique, go to Epcot Center in Orlando. Certified divers can dive their aquarium (Google "Epcot Divequest"). It is quite expensive (what isn't at Disney?), but where else can you dive with 6000 animals of 60 different species all together? Sharks, sea turtles, and lots of other species. I went with my 12 year old son last year and we both loved it.