I checked the tides for Blue Heron Bridge Sun 12/22/13 11:09am 2.9ft high tide could arive at 9 to10am dive at 10:39am to 11:39am during slack tide. Sat 12/21 the day before could take advantage of the $45.00 special Jupiter Dive Center for a am and or pm dives. Maybe a night dive if they have one?