In December, he finished fourth, competing in the senior ranks at the 2017 Four National Championships in Katowice, Poland.

He won his first senior national medal, silver, having finished second to his brother, Jiří Bělohradský.

[4] Making his senior international debut, Bělohradský finished 12th at the 2017 CS Minsk-Arena Ice Star in October.

In December, he placed third at the 2018 Four National Championships in Košice, Slovakia, having ranked sixth in the short program and first in the free skate.

Bělohradský appeared at two Junior Grand Prix events and then placed sixth in the senior ranks at the 2018 CS Tallinn Trophy.