It's totally ridiculous.
Beach condos in St. Pete are all sold out. Booked all the way until April.
Try using Google - "beachfront condos for rent st pete beach fl"
In fact the situation seems dire for landlords -- many ads with "Just Reduced. Last minute October, November dates now"
Go to any of the booking sites found in the search - there is plenty of inventory between now and April. Much of it at reduced rates.
https://www.travelocity.com/St-Pete-Beach-Condos.d9802-aaCondos.Travel-Guide-Accommodation