POSTED: 07:38 a.m. HST, Aug 21, 2014
LAST UPDATED: 11:57 a.m. HST, Aug 21, 2014
Waves with faces of 6 to 9 feet prompted a high surf advisory for south shores Thursday, lasting until 6 p.m. Friday.
The National Weather Service said a storm in the South Pacific generated waves that began reaching all of the main Hawaiian islands Thursday.
Forecasters said the swell should peak overnight and decline to about 5 to 8 feet Friday.
Beach-goers can expect strong, breaking waves, shore break and rip currents that could make swimming difficult and dangerous.
People going to the beach should heed advice given by lifeguards and exercise caution, the weather service said.
Another storm should bring a reinforcement swell Saturday, keeping waves above average through Monday, though probably not at advisory levels.