Halloween by the Sea Halloween on Friday, October 31, 2025, is shaping up to be one of the best nights of the year in Siesta Key. Between the beautiful fall sunsets and ocean breezes, this island knows how to mix tropical charm with spooky fun. Whether you’re looking for family-friendly trick-or-treating or a beachside costume party, Gertrude Rentals has rounded up the best things to do this Halloween season. 1....