Police were called to the Crookhaven Heads Caravan Park before shortly 5am this morning.

The southerly change that swept up the South Coast about 3am brought strong winds to coastal areas.

At about 4.40am a wind gust blew down a large gum tree on the north western boundary of the caravan park inside the park grounds falling onto a tent where three young siblings were asleep.

The tree clipped another gum nearby and snapped off a large branch from that tree.This large branch hit a second tent containing two adults who were also sleeping.

Shoalhaven Police Inspector Paul Condon said one young female in the first tent was injured when she was pinned under the large branch by her shoulders and head.  

The parents of the child and a nurse camping nearby rushed to help.  

The victim was conscious and breathing and suffered possible soft tissue damage and bruising.  

She was conveyed to Shoalhaven Hospital where she is being monitored due to concern with head injuries.

Inspector Condon said it was amazing no one else was seriously injured.