ðə sˈʌðɚn tˈɜːmɪnəs ʌv ˌɛsˈeɪtʃ ˈeɪɾi nˈaɪn ɪz ɐn ætɡɹˈeɪd ˌɪntɚsˈɛkʃən wɪð jˌuːˈɛs wˈʌnhˈʌndɹɪd ˈeɪɾi wˈʌn ænd ˌɛsˈeɪtʃ wˈʌnhˈʌndɹɪd ˈeɪɾi ˈeɪt; nˈɔːɹθbaʊnd jˌuːˈɛs wˈʌnhˈʌndɹɪd ˈeɪɾi wˈʌn tˈɜːnz tə ðə wˈɛst, kˈɑːsaɪnd wɪð wˈɛstbaʊnd ˌɛsˈeɪtʃ wˈʌnhˈʌndɹɪd ˈeɪɾi ˈeɪt, təwˈɔːɹd dˈaʊntaʊn sˈɪntən, ænd ˈiːstbaʊnd ˌɛsˈeɪtʃ wˈʌnhˈʌndɹɪd ˈeɪɾi ˈeɪt kəntˈɪnjuːz təwˈɔːɹd æɹˈænsəz kˈaʊnti.
The southern terminus of SH 89 is an at-grade intersection with US 181 and SH 188; northbound US 181 turns to the west, cosigned with westbound SH 188, toward downtown Sinton, and eastbound SH 188 continues toward Aransas County.