Probably September 15th. I usually take my 32" (68watt) flat screen to the beach to watch football and with air temps staying warm I may be out the next two weekends. Just take a tv, inverter, long power cord, rabbit ears and a tarp backdrop so you have to stare into the sun all day. Great for tans but burns the retinas. Best water temps of the year and not many people around. Later in the month I'm gone but by October 1st the highs are only in the low 70s and is historically where I end it.