hˈeɪslɪt ɐtˈɛndᵻd lˈeɪkwʊd hˈaɪ skˈuːl ɪn sənt. pˈiːɾɚzbˌɜːɡ, wˌɛɹ ʃiː swˈæm fɚðə lˈeɪkwʊd spˈɑːɹtənz hˈaɪ skˈuːl swˈɪm tˈiːm, wˈɪnɪŋ fˈoːɹ flˈɔːɹɪdə hˈaɪ skˈuːl stˈeɪt tʃˈæmpiənʃˌɪps ɪn tˈuː jˈɪɹz.
Haislett attended Lakewood High School in St. Petersburg, where she swam for the Lakewood Spartans high school swim team, winning four Florida high school state championships in two years.