Wessberg turned professional after graduating in June 2003 and joined the
Swedish Golf Tour, where she was Player of the Year after winning the
Ladies Finnish Open and the
Swedish Matchplay Championship. In 2004 she won the
Swedish PGA Championship and the tour championship, the
Telia Ladies Finale.
LET and Solheim Cup Wessberg joined the
Ladies European Tour (LET) in 2004. She was runner-up at the
Ladies Open of Portugal, three strokes behind
Cecilia Ekelundh, and T3 at the
Open de France Dames, to finish ninth on Order of Merit and close runner-up to
Minea Blomqvist for the
LET Rookie of the Year title. In 2005, Wessberg was runner-up at the
Open de España Femenino, before securing her first LET title at the 2006
Wales Ladies Championship of Europe at Machynys Peninsula G&CC. She defeated
Laura Davies by one stroke, winning with a birdie at the 72nd hole. In 2007, she was runner-up at the
Ladies English Open and claimed her second LET victory at the 2007
Vediorbis Open de France Dames in Arras, northern France, where she carded a final-round 65 in heavy rain to finish a shot ahead of
Trish Johnson. Wessberg was a captain's pick for the
2007 European
Solheim Cup team, where she defeated
Cristie Kerr in the singles and recorded a 75% points win rate.
LPGA Tour Wessberg joined the
LPGA Tour with conditional status in 2007 and played in 13 tournaments. She recorded three top-10s, including a T7 in the
2007 Women's British Open at
St Andrews, and finished the season ranked 65th in earnings. In 2008, she competed in 22 events with her best finishes being T8 at both the
LPGA Corning Classic and
Kapalua LPGA Classic. She finished 75th on the Money List.
Ladies European Tour Wessberg earned her third LET title at the 2009
UNIQA Ladies Golf Open in Austria, defeating England's
Laura Davies at the second sudden-death playoff hole at Golfclub Föhrenwald in Wiener Neustadt. After this win, she returned to play in Europe full time. In 2010, she was 23rd on the Money List and in 2011 she ended the season ranked 14th on the Money List, which was her third-best career season, after third place finishes at both the
UNIQA Ladies Golf Open and the
Raiffeisenbank Prague Golf Masters. In 2012, she recorded a T4 at the UNIQA Ladies Golf Open and T7 at the
World Ladies Championship in China. In 2013, her best results were T4s at the
UniCredit Ladies German Open and
Sanya Ladies Open in China, two strokes behind winners
Charley Hull and
Lee-Anne Pace, respectively. In 2015, Wessberg played only in five tournaments and took some time out due to the arrival of her first child. When she returned in 2016 she was runner-up at the
Ladies Scottish Open at Dundonald Links, and finished the season 13th on the Order of Merit. She also won the
Ladies Norwegian Open, an event on the
LET Access Series. Wessberg won a gold medal for Sweden in the
2018 European Golf Team Championships together with
Cajsa Persson, after they beat the French team in the final at Gleneagles. In 2022, Wessberg made a hole-in-one at the
Hero Women's Indian Open, to lead the tournament with a seven-under 65 after the opening round. She finished T12. ==Personal life==