Toyohashi is located in southeastern Aichi Prefecture and is the capital of the informal "Higashi-Mikawa Region" of the prefecture. It is bordered by Shizuoka Prefecture to the east, and by Mikawa Bay and the headlands of the Atsumi Peninsula to the west. To the south is the Enshu Bay of the Pacific Ocean. The presence of the warm Kuroshio Current offshore gives the city a temperate climate. The Katahama Jusan-ri Beach (片浜十三里) in Toyohashi is a sea turtle nesting spot.