Career
She plays for Heimdal Kvinnefotboll, near Trondheim. When Kattem was relegated to division-1 at the end of 2005 Forseth transferred to Trondheims-Ørn. After six seasons at Trondheims-Ørn, during which she played 126 matches and scored 22 goals, Forseth transferred back to Kattem at the start of 2012.
Forseth played one match for Norway in January 2006, a 3–1 defeat by China at the Four Nations Tournament.