Yes, public bathrooms can be found at the following locations:

Boardwalk at Worcester Street
Boardwalk at Caroline Street
3rd Street & St. Louis Avenue next to Skate Park
Boardwalk at 9th Street
Boardwalk at 27th Street
S. Division Street Transit Center

Rinse Stations can be found at:

Caroline Street (4)
Inlet Beach (4)
9th Street (2)