HONOLULU (KHON2) -- A high surf advisory remains in effect for all south-facing shores through Monday.
The National Weather Service said wave heights are reaching 10 feet in some locations, and lifeguards have kept busy all week.
On Friday, there were several rescues as high surf overwhelmed many beachgoers.
Over at Sandy Beach, a video showed two kids playing near the shoreline when a wave came up and swept the girl off of her feet, quickly sending her toward the dangerous shorebreak.
"A guy was right there and tried to pull her up, and then the lifeguard was right there right away so good thing for our lifeguards, they save lives these guys," said Hanalei Ahn, whose local break is Sandy's and was recording a family member when the girl quickly got swept under.
"It happens all the time here, injuries, if you don't know this beach and you don't have experience start elsewhere," he added.
With summer in full swing, beaches are more crowded and wave heights could appear more mellow as Ocean Safety said it's imperative to keep your eyes on your kids.
"Just watch your kids, make sure they are in arms reach of you," said Lt. Tristan Fabro, Honolulu Ocean Safety. "Because it does happen quickly, like you saw in the video."
Surf heights were around 8 to 10 feet at Sandy's on Friday. The NWS said a reinforcing swell is expected to last through the work week.
Ocean Safety reminded folks that just because the advisory is for the south shore, doesn't mean the swell can't reach other parts of the island.
"Sandy's is notorious for the south swells," Lt. Fabro said. "The southwest direction the shore break will flare up even at half point we have surfers that go out, get injuries, people swimming in the shore break."
Around the same time Friday, Ocean Safety rescued a 52-year-old man unresponsive inside the lagoon at Magic Island. Officials said it's still unclear if it was due to a medical condition but Ocean Safety also assisted a 23-year-old and 11-year-old out of the water. All three were taken to the hospital.
Lifeguards advise people to go to guarded beaches, but they can't be everywhere, especially at off-the-beaten-path spots.
Earlier in the week, a local teen helped two Florida visitors at China Walls after throwing one of them a floating device.
Ocean Safety said it likely saved the man's life.