We present a genome assembly from an individual male Hypomecis punctinalis (the Pale Oak Beauty; Arthropoda; Insecta; Lepidoptera; Geometridae). The genome sequence has a total length of 741.20 megabases. Most of the assembly is scaffolded into 30 chromosomal pseudomolecules, including the Z sex chromosome. The mitochondrial genome has also been assembled and is 15.64 kilobases in length. Gene annotation of this assembly on Ensembl identified 13,897 protein-coding genes.