I would translate it as: "The trees swayed in the wind." meaning that the trees moved back and forth slowly because of the wind. Even though the preposition in Spanish is "con", the expression is "sway in the wind", and not "with" the wind. Oh, and I almost forgot to answer your question: the sentence in Spanish means that the trees moved because the wind was blowing. Good luck!

La mejor traducción que se me ocurre es; to swirl back and forth with the wind. or to wave back and forth with the wind.

Muchas gracias para las respuestas! Son muy útiles. :D

Hola, si, solo se movieron con la ayuda del viento. Si los arboles no se movieran con la ayuda del viento, no pondrían la palabra "viento" en la oración.

Hola Ellinor, En ingles se traduciria "the trees would move together with the wind". Disculpa que no use los acentos pero mi keyboard no los tiene. Buena suerte