Snake in a dream symbolizes inherent supernormal observation by third eye. To dream it can mean the process of making operative this specific capacity. Also, it can indicate that your thoughts are based on this superpower. Thus the dream is just a reminder of it. Inherent supernormal observation by third eye symbolism in a snake dream is good omen and predicts fortunate happenings because of insightful perception.
Read more about dreaming of Snake in other dream meanings interpretations.