A 48 year-old woman from the United States has died after becoming separated from her diving group in southern Tasmania.

The woman was diving off Piersons Point at Tinderbox, south of Hobart.

Members of her diving group noticed she was missing and raised the alarm about 1:00pm [AEDST] yesterday afternoon.

Police search and rescue officers brought the woman to shore at the Kingston Yacht Club.

Paramedics performed CPR on the woman there, and on the journey to Hobart, but she was dead on arrival at the Royal Hobart Hospital.

Police are now trying to contact the woman’s husband and other family members.