Emil Hemming was born in Vaasa, Finland and played amateur hockey for Kiekko-Espoo of the U20 SM-sarja league. He only played 2 games in his age 15 season and had 1 assist.
In 2022-2023 he played for HC TPS of the U20 SM-sarja league. In 22 games he tallied 7 goals and 9 assists.
In 2023-2024, Hemming started the season with HC TPS and scored 11 goals and 7 assists in 13 games. After his quick start, he was promoted to the top league to play in the SM-liiga. He played 40 games and recorded 7 goals and 4 assists. He also represented Team Finland at the 2024 World Junior Championships, Hemming had 2 assists and averaged 8:45 minutes of playing time through 7 games.