Hyde Park Village Art Fair: Artists show works in a variety of media starting at 10 a.m. at Hyde Park Village in Tampa. Free. (561) 746-6615.
John's Pass Seafood Festival: This event fills John's Pass with seafood, a blessing of the fleet, live music, a children's area, Halloween activities and more. It's at 10 a.m. at John's Pass Village and Boardwalk in Madeira Beach. Free admission.
Guavaween: There's no parade this year but there is a music festival, with headliners the Hold Steady leading national and local artists. There's also a costume contest with prizes. It starts at 6 p.m. in Ybor City. $30. (813) 241-8838.
Marine Quest: The open house at the Florida Fish and Wildlife Research Institute (100 Eighth Ave. SE, St. Petersburg), has hands-on activities for adults and kids, who can touch critters found in Florida's waters. The USF St. Petersburg campus a block away is hosting the St. Petersburg Science Festival with nearly 100 exhibits celebrating science, technology, engineering and math. They both run from 10 a.m. to 4 p.m. Free.
Halloweenie Roast: Rob Zombie and Marilyn Manson headline this metal fest. It's at 2 p.m. at 1-800-Ask-Gary Amphitheatre in Tampa. $31-$165.98. (813) 740-2446.
Rise of the Zombies, 9 p.m., SyFy Mariel Hemingway stars as a doctor leading a group of refugees during the zompocalypse.
more to explore
Find free events at tampabay.com/things-to-do.