The 2018–19 Círculo Gijón season was their second in existence and their debut in professional basketball, after achieving one of the vacant places in LEB Plata, third division, after the expansion.

After failing to promote to Liga EBA in the club's first season, Círculo Gijón achieved one of the eight places created after the expansion of the LEB Plata from 16 to 24 teams.

On 6 October 2018, Círculo Gijón beat Ávila Auténtica Carrefour "El Bulevar" in their debut in the professional basketball by 75–67.

In his first match, Círculo Gijón beat Quesería La Antigua CB Tormes by 78–66, continuing the team's good streak at home, with three consecutive wins.

On 30 December, Círculo Gijón lost in the last second against Juaristi ISB in a match where point guard Ángel Moro was injured for the rest of the season.

[4] However, the injury of Saúl Blanco, which only played a couple of minutes in the win against Albacete, dropped the team to the relegation positions after six consecutive losses.

Point guard Davy Baltus was fired in the week previous to the match of the seventh round against Torrons Vicens CB L'Hospitalet, that meant the come back of Saúl Blanco and a new win by beating the Catalans by a huge 86–52.