Hapuna Beach Hotel beach boys say around 11:00 a.m. Sunday, a 10 to 15 feet tiger shark was spotted by lifeguards.
Hapuna Beach and Mauna Kea Beach are closed at this time.
A helicopter also did aerial checks from above.
No injuries were reported.
Both beaches will remain closed for the rest of Sunday.
A 43-year-old woman was rushed to the hospital after an accident involving a truck at Pier 39.
An investigation is underway on Maui after a body was found in a ditch.
Mayor Kirk Caldwell will be hosting Honolulu's first Twitter town hall meeting on Monday.