A man assaulted on Matakana Island was flown to Tauranga Hospital with serious injuries last night.

The 52-year-old man was picked up by the Trustpower TECT rescue helicopter on its way back from 3.30pm call to help an 84-year-old Whiritoa woman with a medical condition needing urgent care.

St John ambulance staff treated the man on the island before he was flown for further assessment and treatment.