I live in FT Lauderdale
You don't want to ride a bike here in August
Few or no hostels, campgrounds as rare, Heat not that bad but humidity in the 90s daily will knock you out, plus the ocassional storm which are totally unpredictable
Get a ticket to Vancouver,B.C. or Seattle, Wash.
Ride south thru Washington St,. Oregon will knock your sox off,Go as far as San Francisco, if possible,then next year return and do the ride along Pacific Coast Hwy from SF, to Malibu. You can buy an open jaws ticket that allows to to arrive in one city and depart another