Wave faces today had dropped into the 10- to 15-foot range after two days where waves twice as large pummeled beaches, the National Weather Service said.

A high-surf advisory remained in effect for all northwest facing shores.

But three additional "swell trains" are expected to keep surf in the 10- to 15-foot range possibly until Tuesday, lead forecaster Roy Matsuda said today.

The monster surf yesterday closed Waimea Bay for a second day in a row and sent high waves over beachside roads in some areas.

Lifeguards stayed busy helping 11 people from the water yesterday, including a 27-year-old Texas visitor who was rescued unharmed off Makaha at 5:48 p.m.

Surf on the Leeward Coast was forecast at 5 to 9 feet today after reaching up to 14 feet last night.

South-shore surf remained at 1 to 2 feet, and waves on the east shore were estimated at 1 to 3 feet.

Conditions here are being generated by weather as far away as Japan, where Typhoon Heishan turned a corner last weekend and pushed 18-foot seas eastward, with resulting surf expected to reach Hawai'i late Friday or early Saturday.

Forecasters' models indicated the same storm would strengthen rapidly north of Hawai'i today, generating 40- to 50-knot winds at sea tomorrow as it races north-northeast to Alaska by late Friday.

Another storm off Hok kaido, Japan, may provide low surf on Sunday, forecasters said.