Police are searching for a missing 55-year-old woman who usually lives on a yacht anchored at Aotea/Great Barrier Island

Concerns were raised for Julie Butler this month, and days later it was confirmed her yacht Blazing Shadz wasn't at its usual spot in Kaiaraara Bay.

Police and Coastguard have asked friends, family and other harbour masters for sightings, including at Whangarei - but are now seeking the public's help.