Yes he does speak through dreams, and even visions. Sometimes for us alone, but sometimes for others. I made a post a while ago of a dream he gave me for two girls, who I actually saw in real life a few days after the dream.
Sometimes he seals instructions in dreams in us to be carried out at a later time. Sometimes they are for today or for the future. Most of the time for comfort or for warning.
May Jesus bless you.