The Coast Guard said Thursday small boats will enforce the zone around part of Kailua Bay through Jan. 5. The restrictions may be lifted before then.
Those entering the zone without permission may be fined up to $25,000 and imprisoned for up to 10 years. Yellow buoys mark the restricted area.
Obama and his family are expected to arrive Thursday. It will be Obama’s first visit since the inauguration to the state where he was born and spent most of his childhood.
The Obama family is due to stay at an oceanfront rental home in Kailua through early next month.