I'll go along with Debby on this one...the Gold Coast Meetup Group schedules shore dives almost daily at LBTS. Most of us in the group won't sign up for a shore dive until the date gets close enough that we can have some idea what surf conditions will be like...usually about 5 days ahead. I'm pretty sure that conditions permitting, you'll have no problem buddying up through them - it's just too early to get a firm commitment.
Also, I note on their calendar for that day that they have a 7:30 pm dive set for the SeaTech Ledges in Dania Beach - another excellent shore dive.
BHB has high tide on that day at around 8:30 am, so figure on entering around 8:00 am or so if you go there. It's a long shot, but I might be able to get the morning off work to dive with you at BHB. Can I get back to you next week? You can PM me if you want.
If the weather conditions and your schedule line up, you could do BHB in the morning, catch lunch and a fill, dive LBTS midday, refill and get a quick dinner, and have plenty of time to go on the night dive at SeaTech Ledges...all for the cost of three fills and feeding the parking meters at two locations (BHB parking is free). IMHO that's not a bad day's diving. Again, as the date gets closer you'll probably get other folks to buddy up through the group.
Figure on water temps being between 65 and 70. Most local divers I meet are wearing 5mil wetsuits this time of year. Many are wearing hoods.