Here you have your proposal in correct spanish (of Spain):

Cuando calienta el sol, aquí en la playa
Siento tu cuerpo vibrar cerca de mí
Es tu palpitar, son tus ojos, es tu cara, me estremezco
Oh, Oh, Oh...
Cuando calienta el sol...

Sorry I couldn't find any record of this into my collection. The song is neat and pretty, but yes, very old one. Perhaps you remember who is the author or the group first releasing such song?

Best regards from Spain.