Forsström made her international debut on September 14, 2013 at a Continental Cup in Lillehammer, Norway . In 17 starters she came in 14th and on the following day 15th. On December 6, 2013, she had her premiere in the World Cup in the same place . In the mixed team competition on Lysgårdsbakken , the Finnish quartet only came in eleventh place and thus missed the second round. In the individual competition the next day Forsström took 38th place and was the best Finn.
After two starts in the Continental Cup, she only got back into the World Cup in Sapporo and took 18th and 27th places in the jumps on the Miyanomori hill, collecting her first World Cup points.