Stage 8 of the 2023 Tour de Suisse was a flat stage that took place on .

The stage started in St. Gallen and finished in Abtwil, starting at with an expected finish at (average speed of 49 km/h).

The total distance of the stage was 26 km. The stage included 0 categorized climb(s) and 2 checkpoint(s), and had a total elevation gain of 398 m, and a total descent of -418 m.